U.S.-France Cooperative Research: Turbulence Modelling and Validation

美法合作研究：湍流建模和验证

基本信息

批准号：
9015984
负责人：
Budugur Lakshminarayana
金额：
$ 1.25万
依托单位：
Pennsylvania State Univ University Park
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1991
资助国家：
美国
起止时间：
1991-05-01 至 1996-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9015984&HistoricalAwards=false
关键词：
U.S.France Cooperative Research Turbulence

项目摘要

The award will support collaborative research between Dr. B. Lakshminarayana, Department of Aerospace Engineering, Pennsylvania State University, and Professor Francis Leboeuf, Fluid Mechanics and Acoustics Laboratory, Ecole Centrale de Lyon, France. The objective of this project is to develop and validate models for turbulence. The flow phenomena in turbines is extremely complex. It is three dimensional, turbulent and unsteady, with substantial influence of rotation, curvature and heat transfer effects. Attempts to predict this flow have not been successful due to inadequate turbulence models. The inability of the Navier- Stokes codes to capture the physical phenomena in turbines and pumps has hampered improvements in design and analytical procedures for the development of high performance turbo- machinery. The aim of this cooperative research effort is to develop turbulence models that incorporate the effects of rotation, curvature, compressibility, three dimensionality and heat transfer. The turbulence transport equation (based on density averaging) and velocity-density covariance transport equations will be modelled to derive algebraic stress transport and Algebraic heat flux equations respectively. These equations, coupled with the turbulent kinetic energy and the dissipation equations, and mean momentum equations, should provide accurate prediction of flow and heat transfer field in turbines and pumps. A validation experiment is also proposed to check the accuracy of modelling, including evaluation of various terms contributing to the turbulent stress and energy, and turbulent heat flux transport equations. This research will benefit from the extensive and complementary expertise of the US and French investigators in turbulence modeling of turbomachinery.

该奖项将支持B. Lakshminarayana博士，宾夕法尼亚州立大学航空航天工程系与法国Ecole Centrale de Lyon的Francis Leboeuf教授，Francis Leboeuf教授之间的合作研究。该项目的目的是开发和验证模型的湍流。涡轮机中的流动现象非常复杂。它是三维，湍流且不稳定的，具有旋转，曲率和传热效应的实质性影响。由于湍流模型不足，试图预测这种流程并未成功。 Navier-Stokes代码无法捕获涡轮机和泵中的物理现象，这阻碍了高性能涡轮机械开发的设计和分析程序的改进。这项合作研究工作的目的是开发湍流模型，以结合旋转，曲率，可压缩性，三维和传热的影响。湍流传输方程（基于密度平均）和速度密度协方差方程将分别建模，以分别得出代数应力传输和代数热通量方程。这些方程与湍流动能以及耗散方程以及平均动量方程式相结合，应准确地预测涡轮机和泵中的流动和传热场。还提出了一个验证实验来检查建模的准确性，包括评估有助于湍流应力和能量的各种术语，以及湍流通量传输方程。这项研究将受益于美国和法国调查人员在涡轮机械建模中的广泛和互补专业知识。