融合TR-SPIV,PLIF,PSP技术的沙丘涡控下横向射流的旋涡动力学实验研究

横向射流广泛用于高超声速飞行器的高温热防护，燃气轮机/航空发动机核心热部件的冷却。为了解决横向射流在冷却时流动易分离问题，本项目受新月形沙丘流场特性的启发，选取横向射流的湍流旋涡为研究对象，融合高频响流场测量TR-SPIV技术，激光诱导荧光PLIF技术和快响应压敏漆Fast-PSP技术分别测量沙丘涡控下横向射流的非定常流场，空间浓度场以及壁面气膜覆盖，研究沙丘涡控下湍流旋涡的生成演化，射流的空间掺混以及壁面传热冷却这些物理过程之间的相互影响机制，重点阐述湍流旋涡与流体标量输运的内在联系。本项目将深刻揭示沙丘涡控的内在机理，为进一步优化涡控冷却方法，提升我国高速飞行器热防护和燃气轮机/航空发动机冷却性能提供科学依据和理论基础。

Jet in crossflow (JICF) is widely implemented in the thermal protection of supersonic aircraft and hot components cooling of gas turbine. To alleviate the flow separation in JICF during film cooling, we incorporate the unique flow and turbulent structures of Barchan dune with the JICF concept. Focusing on the turbulent nature of JICF, this project will combine the high-response TR-SPIV, PLIF and Fast-PSP techniques to explore the evolution of turbulent structure, dynamics of sand-dune induced vortex, and coherent structures effect on jet fluid scalar transport. With the emphasis on revealing the inherent correlations between turbulent structure and scalar transport, the objective of this project is to elucidate the underlying principle of sand-dune inspired JICF in both flow structure and transport, to further enhance the cooling capability of JICF, and to potentially proposed a turbulent model dealing with vortex control. The research results of this study will be highly valuable for the development of next-generation advanced thermal protection techniques for supersonic aircraft and engine cooling in the future.