摘要
热声交变流动是热声热机的工作基础,研究交变流动机理有助于人们认识热声热机的工作过程。鉴于前人的理论分析一般没有考虑浮力效应的影响,本文从流体热动力学的角度研究了浮力对流与热声交变流动的耦合规律。基于线性理论方法,给出了考虑浮力项和热对流Rayleigh数的热声线性理论模型,分析了浮力效应对平行交变流动的影响,发现热对流的存在明显影响交变流动速度分布及其"环形效应"。
Oscillating flow is the base research of thermoacoustic engine.Analyzing oscillating flow mechanism can help us understand the working process of thermoacoustic engine.Former theoretical analysis did not consider buoyancy effects.In present paper,the coupling mechanism of thermoacoustic oscillating flow and natural convection is analyzed theoretically.A thermoacoustic linear theory model considering buoyancy effect（Rayleigh number） is presented and evident effects of natural convection on the ＇velocity distribution＇ are found by using linear theory method.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第10期1749-1752,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50890182
No.11072249)
关键词
交变流动
环形效应
浮力效应
热声
线性理论
oscillating flow
annular effect
buoyancy effects
thermoacoustic
linear theory
