10-11-2014, 09:43 AM
Abstracts: Thermoacoustic engine is an effective technology which has a capability to harness the available heat energy in to acoustic work without any moving part in the system.The Main advantages of Thermoacoustic engine are constructional simplicity, reasonable efficiency and environmental friendly working gases. The direct conversion between thermal and mechanical energy without going through any electronic stage makes the mechanism simple. For the analysis of the thermo acoustic prime mover we have used computational fluid dynamics(CFD) based software. The 2D modelling has been done in GAMBIT and the analysis part is done in FLUENT. In this present work two working inert gases like Nitrogen and Helium are taken, keeping constant inside pressure as 20 bar and keeping cold end temperature constant at 300 k and then conducted analysis with variation in working hot end temperatures. In the temperature range of [850 - 1800 k] for Nitrogen we are getting the pressure ratio in the range of [2.29 - 1.17] while for Helium we are getting pressure ratio in the range of[1.20 - 1.14]. For the working of the crycooler the requirement of minimum pressure ratio is 1.15 so we are getting it in both helium and nitrogen. But the pressure variation is more consistent for helium as compared to nitrogen so we are using helium as working gas for cyrocoolers.