Study on Working Fluids Testing and Multiphase Flow Model Optimization in Thermoacoustic Engines

This study investigates the impact of different working fluids on the performance of non-phasechange thermoacoustic engines and compares the application of two multiphase flow models in phasechange thermoacoustic engines. Simulation results show that, at the same heating temperature, air and nitroge...

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Bibliographic Details
Published inE3S web of conferences Vol. 580; p. 1013
Main Authors Xie, Jiutian, Ren, Fan, Yang, Jiale
Format Journal Article Conference Proceeding
LanguageEnglish
Published Les Ulis EDP Sciences 01.01.2024
Subjects
Air temperature
Design optimization
Engines
Flow-density-speed relationships
Fluid flow
Helium
Multiphase flow
Oscillations
Phase change
Thermal conductivity
Thermoacoustics
Working fluids
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Summary:This study investigates the impact of different working fluids on the performance of non-phasechange thermoacoustic engines and compares the application of two multiphase flow models in phasechange thermoacoustic engines. Simulation results show that, at the same heating temperature, air and nitrogen can achieve thermoacoustic oscillations, while helium cannot. This is due to helium’s higher sound speed, lower density, and higher thermal conductivity et al. In the simulation of phase-change thermoacoustic engines, the Mixture model demonstrates higher predictive accuracy compared to the VOF model, as the VOF model emphasizes the effects of phase interfaces, while the Mixture model is better suited for macro-scale multiphase flow analysis and relatively uniform phase-change processes. The findings provide a theoretical basis for the optimization design of phase-change thermoacoustic engines.
Bibliography:ObjectType-Conference Proceeding-1
SourceType-Conference Papers & Proceedings-1
content type line 21
ISSN:2267-1242
2555-0403
2267-1242
DOI:10.1051/e3sconf/202458001013