Modares Mechanical Engineering

Modares Mechanical Engineering

Analysis of the Onset Process of Spontaneous Oscillations in a Standing Wave Thermoacoustic Engine, Using the Experimental Method and an Improved Numerical Solution Method

Document Type : Original Research

Authors
Alireza Moradi 1
fathollah ommi 2
Zoheir Saboohi 3
mohsen bahrami 4
1 PhD student of Tarbiatmodares university
2 professor of tarbiat modares university
3 assistant professor of aerospace research institute
4 PhD student of tharbiat modares university
Abstract
Thermoacoustic engine is an energy conversion device that uses the energy carrying capacity of sound waves to generate sound power from thermal energy. Although it is not difficult to build thermoacoustic engines due to having no moving parts, many researchers have always tried to reduce the temperature difference required to run thermoacoustic engines, so that these devices can be used in most industries. To investigate the onset conditions of the system, temperature changes in the stack section of a standing wave Thermoacoustic engine were investigated. Numerical analysis of temperature changes along the stack, was performed using the rotts thermoacoustic equations. The temperature was calculated instantaneously along the stack, and this process continued until the thermal equilibrium was established in the system. A standing wave with an open end was designed and built to validate the temperature curves obtained at different moments. This thermoacoustic engine was able to display the temperature instantaneously along the stack with parallel plates structure. The data obtained from the experimental tests and the temperature changes diagram resulting from the numerical solution method, showed a good agreement with each other for the onset process in the system.
Keywords
Thermoacoustic Engine
Standing Wave
stack
Onset Process
Numerical analysis

Subjects

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Modares Mechanical Engineering
Volume 21, Issue 11
September 2021
Pages 767-781