行波型热声发动机的设计及实验研究
发布时间：2018-10-26 17:34
【摘要】：热声发动机是一种将热能转换为声功的设备,具有环保、无运动部件等优点。行波型热声发动机的转换效率可达0.3,可以和传统的发动机相媲美。本文依据热声基本理论,利用声电比拟,结合现有的swift热声网络理论,对行波型热声发动机进行了集总参数法分析,建立了完整的行波型热声发动机的网络模型图。利用热声网络模型计算了回热器中的相位差和压力波腹处的压力幅值大小,并与DeltaEC计算进行了比较。分析了回热器孔隙度和谐振管长度对系统性能的影响,为热声发动机的设计提供了理论指导。在行波热声网络模型的基础上,利用DeltaEC软件设计了一台行波型热声发动机,并以氦气作为气体工作介质进行了实验研究。定量的研究了系统充气压力、加热功率对系统频率、振荡压力幅值和压比的影响,得到了在压力一定时,加热功率与频率、声功和压比的关系,以及在加热功率一定时,系统压力与频率、声功和压比的关系;提出了提高热声系统效率的途径,实现热声系统已最小的代价获得最大收益,使热声发动机向实用化迈进了一步。
[Abstract]:Thermoacoustic engine is a kind of equipment for converting heat energy into acoustic power, which has the advantages of environmental protection and no moving parts. The conversion efficiency of traveling wave thermoacoustic engine can reach 0.3, which can be compared with the traditional engine. Based on the basic theory of thermoacoustic, using acoustoelectric analogy and the existing swift thermoacoustic network theory, this paper analyzes the traveling wave thermoacoustic engine by lumped parameter method, and establishes a complete network model diagram of the traveling wave thermoacoustic engine. The phase difference in the regenerator and the pressure amplitude at the pressure wave belly are calculated by using the thermoacoustic network model and compared with the DeltaEC calculation. The influence of the porosity of the regenerator and the length of the resonant tube on the performance of the system is analyzed, which provides theoretical guidance for the design of the thermoacoustic engine. Based on the traveling wave thermoacoustic network model, a traveling wave thermoacoustic engine is designed by using DeltaEC software. The effects of gas pressure and heating power on system frequency, oscillatory pressure amplitude and pressure ratio are quantitatively studied. The relationship between heating power and frequency, acoustic power and pressure ratio is obtained when the heating power is constant, and when the heating power is constant, the relationship between heating power and frequency, acoustic power and pressure ratio is obtained. The relationship between system pressure and frequency, acoustic power and pressure ratio; A way to improve the efficiency of thermoacoustic system is put forward to realize the minimum cost of thermoacoustic system and obtain the maximum benefit, which makes the thermoacoustic engine a step forward in practical use.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK05
本文编号：2296469
[Abstract]:Thermoacoustic engine is a kind of equipment for converting heat energy into acoustic power, which has the advantages of environmental protection and no moving parts. The conversion efficiency of traveling wave thermoacoustic engine can reach 0.3, which can be compared with the traditional engine. Based on the basic theory of thermoacoustic, using acoustoelectric analogy and the existing swift thermoacoustic network theory, this paper analyzes the traveling wave thermoacoustic engine by lumped parameter method, and establishes a complete network model diagram of the traveling wave thermoacoustic engine. The phase difference in the regenerator and the pressure amplitude at the pressure wave belly are calculated by using the thermoacoustic network model and compared with the DeltaEC calculation. The influence of the porosity of the regenerator and the length of the resonant tube on the performance of the system is analyzed, which provides theoretical guidance for the design of the thermoacoustic engine. Based on the traveling wave thermoacoustic network model, a traveling wave thermoacoustic engine is designed by using DeltaEC software. The effects of gas pressure and heating power on system frequency, oscillatory pressure amplitude and pressure ratio are quantitatively studied. The relationship between heating power and frequency, acoustic power and pressure ratio is obtained when the heating power is constant, and when the heating power is constant, the relationship between heating power and frequency, acoustic power and pressure ratio is obtained. The relationship between system pressure and frequency, acoustic power and pressure ratio; A way to improve the efficiency of thermoacoustic system is put forward to realize the minimum cost of thermoacoustic system and obtain the maximum benefit, which makes the thermoacoustic engine a step forward in practical use.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TK05
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相关期刊论文 前4条
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