US-Federal Republic of Germany Cooperative Research: Advanced Experimental Techniques and Turbulence Models for Turbulent Separated Flows

该奖项支持教授罗杰L。辛普森和其他人 弗吉尼亚理工学院和州立大学的一个研究小组 (VPI)与弗兰兹教授合作进行工程研究 杜斯特和其他流体力学小组的成员在密歇根大学 埃尔兰根，德国的联邦共和国。 他们的目标 交流先进的实验技术， 湍流分离流，并开发改进的湍流模型， 基于它们的集体数据积累来分离流。 两 研究小组是研究分离的湍流结构的领导者。 流动和分离流的实验技术方面。 他们的经验和独特的设施是互补的。 VPI 主要研究非定常和三维外部分离 流动，并迅速发展了扫描激光风速仪， 灵敏的压力波动测量技术。 埃尔兰根 组集中在内部分离流，如在管道和 其他流动通道，是开发先进激光器的领导者 风速测量技术。 微型LDV的设计与发展 埃尔兰根将允许VPI集团建立和安装单位在动态 风洞模型 VPI压力波动技术将是 应用于埃尔兰根的内部分离流。 分离流是公认的限制因素 飞机和海上交通工具的性能、喷气发动机、管道流 系统和其他实用设备。 直到激光的发展 风速计，很少有基本的了解，分离的性质， 流动是可能的。 在过去的15年里，VPI和埃尔兰根 这些团体为基本的 了解湍流分离流。 更复杂的工作 这些团体将继续存在分离问题， 建议支持。

This award supports Professor Roger L. Simpson and others in his research group at Virginia Polytechnic Institute and State University (VPI) for collaboration in engineering research with Professor Franz Durst and others of the Fluid Mechanics Group at the University of Erlangen, Federal REpublic of Germany. The objectives of their collaboration are to exchange advanced experimental techniques for turbulent separated flows and to develop improved turbulence models for separated flows based on their collective accumulation of data. Both groups are leaders in research on the turbulent structure of separated flows and in aspects of experimental techniques for separated flow. Their experience and unique facilities are complementary. VPI concentrates on unsteady and three-dimensional external separated flows and has developed rapidly scanning laser anemometry and sensitive pressure fluctuation measuring techniques. The Erlangen group concentrates on internal separated flows, such as in ducts and other flow passages, and is a leader in developing advanced laser anemometry techniques. The micro-LDV designs and developments in Erlangen will allow the VPI group to build and mount units in dynamic wind tunnel models. VPI pressure fluctuation techniques will be applied to internal separated flows in Erlangen. Separated flow is well recognized as the limiting factor to the performance of aircraft and sea vehicles, jet engines, ducted flow systems, and other practical devices. Until the development of laser anemometry, little basic understanding of the nature of separated flow was possible. In the last fifteen years, the VPI and Erlangen groups have made a number of significant contributions to the basic understanding of turbulent separated flow. Work on more complicated separation problems will be continued by these groups under the proposed support.