Conference Presentations by Vladimir A R K A D I E V I C H Sannikov
This technology relates to wind energy, where there is a problem: how to collect wind energy from... more This technology relates to wind energy, where there is a problem: how to collect wind energy from a large area and concentrate it in a turbine. New technology and devices that solve this problem are being declared. This technology differs from modern technology in that it has a rigorous mathematical basis, with the help of which devices that create the Venturi effect in an open air stream were first developed. The declared technology opens up a new direction in the development of wind energetic, as it shows how to control the movement of an open air stream. The wind is accelerated by a circular or elliptical cylinder with a movable outer surface. The required amount of air to achieve a given flow rate in front of the turbine is provided by a special artificial terrain in front of and behind the turbine. The characteristics of the cylinder and artificial terrain are calculated based on the theory of potential flow around the cylinder. Two types of devices for collecting and concentrating wind energy are declared: with and without the use of artificial screens. The claimed technology allows to eliminate the negative effect of the proximity of the earth's screen on the aerodynamics of the accelerating cylinder, which near the earth works the same as at high altitude.
Based on the works, the method and the MATLAB program are designed to calculate the non stationar... more Based on the works, the method and the MATLAB program are designed to calculate the non stationary aerodynamic derivatives of the Darrieus turbine rectangular working blades under conditions of harmonic changes in the kinematic parameters. The method allows you to analyze the characteristics of the turbine, when the rotor speed changes (transition to operating mode), as well as when adjusting of the blades angles during rotation. The method uses the modeling of aerodynamics of the blade by a system of a finite number of horseshoe vortices. The circulation of these vortices varies in time in accordance with the change in the kinematic parameters of the blade. The change in the circulation of these vortices causes the formation of a vortex sheet behind each horseshoe vortex. To determine the circulation of each horseshoe vortex, boundary conditions are established on the moving blade at control points (collocation points). As a result, we obtain a system of algebraic equations for the circulation of all horseshoe vortices.
The report proposes a new method for calculating the power of the Darrieus turbine, which has the... more The report proposes a new method for calculating the power of the Darrieus turbine, which has the following design innovations in comparison with the classical schemes:
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions [1].
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation [1].
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors [3, 4, 5].
The developed method is based on the theory of the aerodynamic profile and the wing, the law of conservation of momentum and the Bernoulli principle for the jet of air passing through the turbine (Blade Element Momentum Theory). The corresponding algorithms are implemented in the MATLAB environment within the single-jet single-disk model (single stream tube and single power disk model). To simulate the work of the output path with a diffuser and a lens, experimental results were used for testing lens diffusers in open flow and interceptors. In addition, the results of theoretical calculations of flat plates in a transverse flow were taken into account. Using the compiled program, a wide parametric study of the 4 - blade turbine was carried out. The results of calculations show that the power of the turbine can be increased by 2 ... 2.3 times in comparison with the classical scheme of the Darrieus turbine.
Based on the non stationary vortex theory , the method and the MATLAB program are designed to ca... more Based on the non stationary vortex theory , the method and the MATLAB program are designed to calculate the non stationary aerodynamic derivatives of the Darrieus turbine rectangular working blades under conditions of harmonic changes in the kinematic parameters. The method allows you to analyze the characteristics of the turbine, when the rotor speed changes (transition to operating mode), as well as when adjusting of the blades angles during rotation. The method uses the modeling of aerodynamics of the blade by a system of a finite number of horseshoe vortices. The circulation of these vortices varies in time in accordance with the change in the kinematic parameters of the blade. The change in the circulation of these vortices causes the formation of a vortex sheet behind each horseshoe vortex. To determine the circulation of each horseshoe vortex, boundary conditions are established on the moving blade at control points (collocation points). As a result, we obtain a system of algebraic equations for the circulation of all horseshoe vortices.
The report proposes a new method for calculating the power of the Darrieus turbine, which has the... more The report proposes a new method for calculating the power of the Darrieus turbine, which has the following design innovations in comparison with the classical schemes:
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
The report proposes a new method for calculating the power of the Darrieus turbine, which has the... more The report proposes a new method for calculating the power of the Darrieus turbine, which has the following design innovations in comparison with the classical schemes:
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
The report proposes a new method for calculating the power of the Darrieus turbine, which has the... more The report proposes a new method for calculating the power of the Darrieus turbine, which has the following design innovations in comparison with the classical schemes:
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
Papers by Vladimir A R K A D I E V I C H Sannikov
The report proposes a new method for calculating the power of a small-scale Darrieus VAWT H-type,... more The report proposes a new method for calculating the power of a small-scale Darrieus VAWT H-type, which has the following design innovations in comparison with the classical schemes:
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by flows of opposite directions. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions [1].
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation [1].
• The system for adjusting of blades angles during rotation realizes the modes of turbine self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors [8, 9 and 10].
• To increase the flow rate at the inlet to the turbine (wind speed), fans are installed.
The developed method is based on the theory of the aerodynamic profile and the wing, the law of conservation of momentum and the Bernoulli principle for the jet of air passing through the turbine (Blade Element Momentum Theory). The corresponding algorithms are implemented in the MATLAB environment within the single-jet single-disk model (single stream tube and single power disk model). To simulate the work of the output path with a diffuser and a lens, experimental results were used for testing lens diffusers in open flow [9, 10] and interceptors [7]. In addition, the results of theoretical calculations of flat plates in a transverse flow were taken into account. Using the compiled program, a wide parametric study of the 4 - blade turbine was carried out. The results of calculations show that the power of the turbine can be increased by 2 ... 3 times in comparison with the classical scheme of the Darrieus turbine
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Conference Presentations by Vladimir A R K A D I E V I C H Sannikov
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions [1].
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation [1].
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors [3, 4, 5].
The developed method is based on the theory of the aerodynamic profile and the wing, the law of conservation of momentum and the Bernoulli principle for the jet of air passing through the turbine (Blade Element Momentum Theory). The corresponding algorithms are implemented in the MATLAB environment within the single-jet single-disk model (single stream tube and single power disk model). To simulate the work of the output path with a diffuser and a lens, experimental results were used for testing lens diffusers in open flow and interceptors. In addition, the results of theoretical calculations of flat plates in a transverse flow were taken into account. Using the compiled program, a wide parametric study of the 4 - blade turbine was carried out. The results of calculations show that the power of the turbine can be increased by 2 ... 2.3 times in comparison with the classical scheme of the Darrieus turbine.
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
Papers by Vladimir A R K A D I E V I C H Sannikov
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by flows of opposite directions. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions [1].
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation [1].
• The system for adjusting of blades angles during rotation realizes the modes of turbine self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors [8, 9 and 10].
• To increase the flow rate at the inlet to the turbine (wind speed), fans are installed.
The developed method is based on the theory of the aerodynamic profile and the wing, the law of conservation of momentum and the Bernoulli principle for the jet of air passing through the turbine (Blade Element Momentum Theory). The corresponding algorithms are implemented in the MATLAB environment within the single-jet single-disk model (single stream tube and single power disk model). To simulate the work of the output path with a diffuser and a lens, experimental results were used for testing lens diffusers in open flow [9, 10] and interceptors [7]. In addition, the results of theoretical calculations of flat plates in a transverse flow were taken into account. Using the compiled program, a wide parametric study of the 4 - blade turbine was carried out. The results of calculations show that the power of the turbine can be increased by 2 ... 3 times in comparison with the classical scheme of the Darrieus turbine
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions [1].
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation [1].
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors [3, 4, 5].
The developed method is based on the theory of the aerodynamic profile and the wing, the law of conservation of momentum and the Bernoulli principle for the jet of air passing through the turbine (Blade Element Momentum Theory). The corresponding algorithms are implemented in the MATLAB environment within the single-jet single-disk model (single stream tube and single power disk model). To simulate the work of the output path with a diffuser and a lens, experimental results were used for testing lens diffusers in open flow and interceptors. In addition, the results of theoretical calculations of flat plates in a transverse flow were taken into account. Using the compiled program, a wide parametric study of the 4 - blade turbine was carried out. The results of calculations show that the power of the turbine can be increased by 2 ... 2.3 times in comparison with the classical scheme of the Darrieus turbine.
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by counter flows. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions.
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation.
• The system for adjusting the angles of the installation of blades during rotation realizes, on a mathematical model, the modes of self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors
• The 2-rotor turbine has a two-circuit air supply to the blades. In this design, each rotor is blown by flows of opposite directions. This ensures the motion of all the blades along the flow, so that the blades of each half of the rotor work under the same conditions [1].
• The turbine has a system for adjusting the angles of the blades during rotation. The laws of regulation are chosen so as to ensure maximum efficiency of the turbine operation [1].
• The system for adjusting of blades angles during rotation realizes the modes of turbine self-starting and output to the operating modes of a turbine using wind energy only.
• A mathematical model of the terrain at the entrance to the turbine has been developed to realize the confuser effect of increasing the wind speed.
• Design of the turbine output path according to the diffuser with flanged diffuser (diffuser with wind lens) scheme to increase air flow through the turbine by creating a zone of reduced pressure behind the interceptors [8, 9 and 10].
• To increase the flow rate at the inlet to the turbine (wind speed), fans are installed.
The developed method is based on the theory of the aerodynamic profile and the wing, the law of conservation of momentum and the Bernoulli principle for the jet of air passing through the turbine (Blade Element Momentum Theory). The corresponding algorithms are implemented in the MATLAB environment within the single-jet single-disk model (single stream tube and single power disk model). To simulate the work of the output path with a diffuser and a lens, experimental results were used for testing lens diffusers in open flow [9, 10] and interceptors [7]. In addition, the results of theoretical calculations of flat plates in a transverse flow were taken into account. Using the compiled program, a wide parametric study of the 4 - blade turbine was carried out. The results of calculations show that the power of the turbine can be increased by 2 ... 3 times in comparison with the classical scheme of the Darrieus turbine