Engineering Initiation Award: Effects of Curvature, Pressure, Gradient, and Freestream Turbulence on Reynolds Analogy in Transitional Boundary Layer Flow

工程启动奖：曲率、压力、梯度和自由流湍流对过渡边界层流雷诺类比的影响

• 批准号: 8708843
• 负责人: Ting Wang
• 金额: $ 7万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-07-01 至 1990-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8708843&HistoricalAwards=false
• 关键词: Engineering; Initiation; Award; Effects; Curvature

As much as 50-80 percent of the surface of a typical blade of a gas turbine is covered by flow undergoing transition from the laminar regime to the turbulent regime. The insufficiency of current models for predicting heat transfer at the surface of gas turbine blades can be traced to the present inability to predict the onset of transition and to model the energy transport in a boundary layer undergoing transition. The proposed research will experimentally investigate the effect on transition of the following three parameters: (a) freestream turbulence intensity, (b) surface curvature, and (c) streamwise pressure gradient.

典型的燃气轮机叶片表面的50- 80%被层流向湍流过渡的气流所覆盖。目前预测燃气轮机叶片表面传热的模型的不足可以追溯到目前无法预测转变的开始和模拟正在发生转变的边界层中的能量输运。本研究将实验研究以下三个参数对转捩的影响：(a)自由流湍流强度，(b)表面曲率，(c)流向压力梯度。