Small Grants for Exploratory Research: Optimum Design of Turbulent Flow Diffusers

在探索性研究小额赠款的资助下，将进行数值计算，以测试快速有效地获得优化流动的方案的有效性。测试对象将是二维扩散器中的湍流。优化的目标是在给定的进口条件和扩散器长度下获得最大压升。计算中将采用传统的工程湍流模型。随着优化方案的进行，优化配置将在连续验证中使用相同的模型进行测试。快速优化方法使某些性能参数(压力、阻力)最大化或最小化，而不需要进行耗时的反复试验，在各种工程流动系统中将具有很大的实用价值。

Funded by a Small Grant for Exploratory Research, a numerical calculation will be carried out to test the validity of a scheme for rapidly and efficiently obtaining optimized flows. The test case will be turbulent flow in a two-dimensional diffuser. The optimization is to attain the maximum pressure rise for given inlet conditions and diffuser length. A conventional engineering turbulence model will be incorporated into the calculation. The optimized configuration will be tested with the same model in a continuous validation as the optimization scheme proceeds. Fast optimization methods to maximize or minimize some performance parameter (pressure, drag), without recourse to time consuming trial and error, would be of great utility in a variety of engineering flow systems.