热声发动机起振过程系统温度时序特性

TIME SERIES CHARACTERISTIC OF THE THERMO-ACOUSTIC ENGINE'S TEMPERATURE DURING ON-SET PROCESS

针对热声发动机起振过程中复杂的温度变化,在自行研制的"驻波型热声发动机试验平台"上,开展了在不同的工质类型、充气压力等试验工况下,热声发动机起振过程的轴向温度分布规律和变化特征的试验研究。试验结果表明:对于氮气、氩气而言,其系统温度动态特性规律基本一致,且热声核温度梯度和热声板叠温度梯度存在较明显的差别;而对于氦气,其系统温度动态特性不同于前两类气体,且热声核的温度梯度和热声板叠温度梯度的差别十分微弱,可见,不同的工质类型将直接影响到发动机起振过程系统温度的动态变化特性。

The thermodynamic characteristics of the thermo-Acoustic system with the helium-argon mixtures as working fluid were investigated experimentally in the self-built test rig of Standing-Wave Thermo-acoustic Engine.The focus is on the exploration of the axial temperature distribution and dynamic characteristics of the thermo-acoustic system during the on-set process under different charg- ing pressure and working fluid.The experimental results reveal that the different working fluids affect the temperature dyn...