激波/各向同性湍流相互作用的研究进展

Progress of Researches on Shock-homogeneous Isotropic Turbulence Interaction

激波/湍流相互作用对于超声速飞行器力/热环境以及噪声特性具有显著影响,本文分别从理论、试验和数值模拟方面介绍了激波/各向同性湍流相互作用的相关研究。理论模型通过湍流模态分解以及线性近似分析了激波/各向同性湍流相互作用对于雷诺应力、涡量脉动以及湍流尺度的影响。试验研究验证了理论分析的部分重要结论,推进了激波/各向同性湍流相互作用的研究工作。数值模拟进一步针对湍流动力学脉动与热力学脉动在激波作用下的变化提供了机理解释。基于针对激波/各向同性湍流相互作用的理论、试验和数值模拟研究成果,部分学者针对湍流模型修正以及湍流噪声变化开展了研究,前者有效改善了湍流模型在模拟含激波/湍流相互作用流动的精度,后者则为激波作用下湍流噪声的变化提供了详细的解释。

Shock-turbulence interaction has a significant impact on the aerodynamic performance and noise characteristic of supersonic vehicles.This paper introduces the related researches of shock-homogeneous isotropic turbulence interaction from theory,experiment and numerical simulation.The theoretical researches analyzed the impact of shock-homogeneous isotropic turbulence interaction on Reynolds stress,vorticity fluctuation and turbulence scale through mode decomposition and linear approximation.Experimental studies verified some important conclusions of theoretical analysis,and promoted the research of shock-homogeneous isotropic turbulence interaction.Furthermore,numerical simulations provided rational explanations for the changes of turbulent dynamic and thermodynamic fluctuations under shock wave.Based on the theoretical,experimental and numerical simulation studies about shock-homogeneous isotropic turbulence interaction,some researches have been carried out to study the turbulence model correction and turbulence noise change under shockturbulence interaction.The former effectively improved the accuracy of turbulence model in simulating the flow of shockturbulence interaction,and the latter provided a detailed explanation for the changes in turbulent noise under shock wave.