Work

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

Year: 2024

Type: article

Abstract: \nThis 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.\n

Source: Springer Link (Chiba Institute of Technology)

DOI: 10.1051/e3sconf/202458001013/pdf

Authors: Jiutian Xie, Fan Ren, Jiale Yang

Institution: Chongqing University

Language: English

Topic: Advanced Thermodynamic Systems and Engines

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

Funders: Natural Science Foundation of Chongqing, Centre Scientifique et Technique du Bâtiment