PIV Studies of Supersonic, Compressible Mixing Layers

摘要 提案编号：CTS-9615585主要研究者：Mungal 这是一项将PIV测量技术应用于可压缩混合层研究的资助。 这项研究将提供新的见解可压缩混合。这项研究将侧重于自由流动的流体被夹带、获得或失去动量并变成湍流的机制。 波动速度、雷诺应力、应变率和膨胀将被直接测量。 通过对标量混合场和PIV矢量场同时成像，可以在两个瞬时场之间进行比较。 这将为可压缩湍流的性质提供新的信息。 还将研究激波结构和湍流之间的相互作用。 希望这项工作能为理论建模者提供指导。 超声速流动中可压缩混合层的研究无论从理论上还是应用上都具有重要意义。 该研究计划充分利用了设备齐全的实验室，为NSF的支持提供了重要的杠杆作用。

ABSTRACT Proposal Number: CTS-9615585 Principal Investigator: Mungal This is a grant to apply the PIV measurement technique to the study of compressible mixing layers. This study should give new insight compressible mixing. The study will focus on the mechanisms by which freestream fluids are entrained, gain or lose momentum and become turbulent. Fluctuating velocities, Reynolds stress, strain rates and dilatation will be measured directly. By simultaneously imaging the scalar mixing field with the PIV vector field, a comparison between the two instantaneous fields can be made. This will provide new information on the nature of compressible turbulence. Studies will also be made of the interaction between shock structures and turbulence. It is hoped that this work will provide guidance to theoretical modelers. The understanding of compressible mixing layers in supersonic flow is of great interest form both a fundamental and applications viewpoint. The research program fully utilizes a well equipped laboratory, providing significant leverage to the NSF support.