Experimental Investigation of Streaming in a Thermoacoustic Engine

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Jebraeili, Pouya | 2017

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 49652 (45)
University: Sharif University of Technology
Department: Aerospace Engineering
Advisor(s): Ghorbanian, Kaveh
Abstract:
Streaming is a phenomenon that is driven by acoustic oscillations and leads to the reduction of efficiency in thermoacoustic engines. Acoustic streaming induced by acoustic oscillations is a steady mass-flux of second order and can cause heat leak that greatly reduces efficiency. There are two types of streaming in thermoacoustic engines; Gedeon streaming and Rayleigh streaming. Gedeon streaming exists within the porous media and Rayleigh streaming occurs in the thermal buffer tube. Thermal buffer tube separates the hot heat exchanger from secondary cold heat exchanger. In this thesis, experimental study of Gedeon streaming and Rayleigh streaming has been accomplished by temperature measurement along the regenerator and Thermal buffer tube. Results of the experiments have been analyzed and compared with the recent similar experiments. Results showed that reduction of mean pressure is unfavorable for suppressing the Gedeon streaming. However, this reduction of mean pressure is desirable for dealing with Rayleigh streaming
Keywords:
Thermoacoustic Engine ; Experimental Studies ; Streaming Algorithm ; Gedeon Streaming Phenomenon ; Rayleigh Streaming Phenomenon

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