Fluid Mechanics Thermodynamics of Turbomachine - S L. Dixon
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Abstract
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This book provides a comprehensive overview of the fluid mechanics and thermodynamics pertinent to turbomachines. It reflects advancements made in the field over the past two decades, focusing on both fundamental principles and innovative design methods, including the use of computational fluid dynamics. The text is geared towards engineers and is structured to facilitate understanding without heavy reliance on mathematical models, thus making it suitable for both undergraduate and postgraduate students in engineering.
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Fundamentals of Turbomachines Erick Dick
The purpose of this series is to focus on subjects in which fluid mechanics plays a fundamental role. As well as the more traditional applications of aeronautics, hydraulics, heat and mass transfer etc., books will be published dealing with topics which are currently in a state of rapid development, such as turbulence, suspensions and multiphase fluids, super and hypersonic flows and numerical modelling techniques. It is a widely held view that it is the interdisciplinary subjects that will receive intense scientific attention, bringing them to the forefront of technological advancement. Fluids have the ability to transport matter and its properties as well as transmit force, therefore fluid mechanics is a subject that is particulary open to cross fertilisation with other sciences and disciplines of engineering. The subject of fluid mechanics will be highly relevant in such domains as chemical, metallurgical, biological and ecological engineering. This series is particularly open to such new multidisciplinary domains. The median level of presentation is the first year graduate student. Some texts are monographs defining the current state of a field; others are accessible to final year undergraduates; but essentially the emphasis is on readability and clarity.
Computational Fluid Dynamics in Turbomachinery: A Review of State of the Art
Computational fluid dynamics (CFD) plays an essential role to analyze fluid flows and heat transfer situations by using numerical methods. Turbomachines involve internal and external fluid flow problems in compressors and turbines. CFD at present is one of the most important tools to design and analyze all types of turbomachinery. The main purpose of this paper is to review the state of the art work carried out in the field of turbomachinery using CFD. Literature review of research work pertaining to CFD analysis in turbines, compressors and centrifugal pumps are described. Various issues of CFD codes used in turbomachinery and its parallelization strategy adopted are highlighted. Furthermore, the prevailing merits and demerits of CFD in turbomachinery are provided. Open areas pertinent to CFD investigation in turbomachinery and CFD code parallelization are also described.
CFD Code – a Useful Tool for the Turbomachinery Designer
The presentation of CFX-TASCflow code possibilities for the turbomachinery design is the main aim of this study. In the first part of the work the compressor redesign process is presented. Next, CFX-TASCflow possibilities in predicting unstable operating conditions (surge) are shown. The one-stage, radial blower installed in the Institute of Turbomachinery TU of Lodz has been chosen owing to the available numerous experimental data. The pump calculations discussed in the third part concern a comparison of different turbulence models with the experimental results. In the last part devoted to the turbine redesign, the code usefulness is proved on the examples of the last stage design process.
Fundamentals of Turbomachines
Springer eBooks, 2015
The use of general descriptive names, registered names, trademarks, service marks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.
Turbomachinery of Gas Turbines in CFD
CFD Open Series, 2023
Fluid mechanics and thermodynamics are the fundamental sciences used for turbine aerodynamic design and analysis. Several types of fluid dynamic analysis are useful for this purpose. The concept through-flow analysis is widely used in axial-flow turbine performance analysis. This involves solving the governing equations for inviscid flow in the hub-to-shroud plane at stations located between blade rows. The flow is normally considered to be axisymmetric at these locations, but still three-dimensional because of the existence of a tangential velocity component. Empirical models are employed to account for the fluid turning and losses that occur when the flow passes through the blade rows. By contrast, hub-to-shroud through-flow analysis is not very useful for the performance analysis of radial-flow turbomachines such as radial-inflow turbines and centrifugal compressors. The inviscid flow governing equations do not adequately model the flow in the curved passages of radial turbomachines to be used as a basis for performance analysis. Instead, a simplified “pitch-line” or “mean-line” one-dimensional flow model is used, which ignores the hub-to-shroud variations. These also continue to be used for axial-flow turbine performance analysis. Computers are sufficiently powerful today that there is really no longer a need to simplify the problem that much for axial-flow turbomachinery. More fundamental internal flow analyses are often useful for the aerodynamic design of specific components, particularly blade rows. These include 2D flow analyses in either the blade-to-blade or hub to shroud (Through Flow) direction, and Quasi-3D flow analyses developed by combining those 2D analyses. Wall boundary layer analysis is often used to supplement these analyses with an evaluation of viscous effects.
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Advances in Fluid Dynamics of Turbomachinery
International Journal of Rotating Machinery
A way to explore the possibility of new kinds of turbomachinery
In this article we desire to explore the capability of conceiving new kinds of turbomachinery, and to estimate their performance and their application domain. We need to extend the classical Euler equation for turbomachinery for non relative stationary flow and non permanent fluid boundaries. To obtain reasonably tractable relations for exploratory purposes, we limit our study to incompressible non viscous flow. The simplifying chosen boundaries conditions lead to hydraulic turbomachinery type and we focus on turbines. It is possible to establish a chart of performance in the cases of limited effects of gravity on rotor flow and the domain of use is compared to classical hydraulic turbines. In other cases the model can be applied and leads to turbomachines which appear more as water wheels but it offers another way to apprehend and design them.
Computational Models for Turbomachinery Flows
1984
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CFD for Turbomachinery:Methods and Applications
2020
Turbomachinery CFD has been extensively used for decades and variety of tools have been developed for dealing with specific phenomena appearing in these machines. The tools enable significant computational savings, or provide simplified models for preliminary evaluation, which resulted in establishing CFD as a common, efficient R&D technique in industry. In this paper we present the methods for modeling complex flows inside various types of turbomachinery. A general overview of tools for turbomachinery simulations available in foam-extend is given, with the application demonstrated for both incompressible and compressible flow problems. Appropriate methods should be chosen depending on the physics and geometry involved: • steady-state or transient approach, • single blade passage or full annulus configuration, • type of rotor-stator interaction interface, • compressible or incompressible problem, • implicitly block–coupled or segregated pressure-velocity system, etc. All options wil...
Integration of Fluid Thermodynamic and Transport Properties in Conceptual Turbomachinery Design
Volume 6B: Turbomachinery, 2013
The interest in designing gas turbine cycles that use unconventional working fluids is increasing. To be able to design the turbomachinery for these cycles the design programs need to be modified. This paper describes how a streamline curvature compressor design program, a one-dimensional compressor design program and a cycle performance program are linked to a thermodynamic properties program. A case study is described where the streamline curvature program is used to design a three stage compressor that has air as a working fluid. The design is completed both using a semiperfect gas assumption and the new modification using a state of the art real gas data thermodynamic properties program. If not properly implemented real gas data retrieval may completely dominate calculation times. An algorithm targeting high numerical efficiency intended for through-flow multidimensional optimization is outlined. Various implementation recommendations associated with the integration of the real gas data program into the one-dimensional compressor design program and the cycle program are described.
Turbomachinery Design and Theory
Turbomachinery Design and Theory Rama S. R. Gorla Cleveland State University Cleveland, Ohio, U.S.A. Aijaz A. Khan N.E.D. University of Engineering and Technology Karachi, Pakistan
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