Papers by Dr. Keyur Desai
ABSTRACT A standing wave type thermoacoustic pressure wave generator for 300 Hz operating frequen... more ABSTRACT A standing wave type thermoacoustic pressure wave generator for 300 Hz operating frequency is designed and developed for helium as a working fluid. The device is designed as a half wave length resonator. A parallel plate type SS 304 stack is designed and fabricated. An electric heater is used for heat supply to the hot end heat exchanger while a water cooled heat exchanger is used to maintain the other end of the stack near ambient temperature. An acoustic amplifier is used to amplify the pressure ratio generated. Experiments are conducted to study the onset behavior of pressure wave generator in terms of temperature range. Observations are recorded using piezoelectric pressure transducer. The results are obtained with different charging pressure and heat inputs. A pressure ratio of around 1.1 to 1.15 has been obtained using Nitrogen as a working fluid. The onset of thermoacoustic oscillations are studied for different filling pressure and for a range of hot end temperature.
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Papers by Dr. Keyur Desai