GOALI: Surface Heat Transfer, Surface Skin Friction, and a Reynolds Analogy for Flows Over Surfaces with Real Component Roughness

GOALI：表面传热、表面蒙皮摩擦以及具有真实组件粗糙度的表面流动的雷诺类比

• 批准号: 0086011
• 负责人: Phillip Ligrani
• 金额: $ 15.6万
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-15 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0086011&HistoricalAwards=false
• 关键词: GOALI; Surface; Heat; Transfer; Skin

Proposal Number: 0086011GOALI: Surface Heat Transfer, Surface Skin Friction, and a Reynolds Analogy For Flows Over Surfaces With Real Component RoughnessPI: Phillip LigraniABSTRACTThis project focuses on fundamental research to relate friction and thermal effects of flow path surfaces to "real" detailed surface roughness from actual applications. These include the complex, spatially-varying roughness on internal turbine airfoil cooling passages, external turbine airfoil surfaces (as employed in gas turbine engines), and heat exchanger surfaces. Such roughness plays major roles in augmenting heat loading, pressure drop, drag, and aerodynamic losses.The "real" rough surfaces employed for testing are prepared using similar procedures and environments employed for actual operating engine components, and are provided by General Electric Corporate Research and Development Center, and General Electric Aircraft Engines. Experimental data are obtained in an internal channel flow, as well as on an external airfoil with the same Reynolds numbers, Mach numbers, pressure gradients, free-stream turbulence levels, passage flow rates, boundary layer development, and physical dimensions as those that exist in operating gas turbine engines. Two principal goals are: (i) the development of a rough surface Reynolds Analogy for flows over the rough surfaces encountered in the actual applications, and (ii) the development of new predictive models to account for roughness in boundary layer numerical prediction schemes. The results obtained as part of this study are also useful for the development of improved surface manufacturing techniques.

提案编号：0086011 目标：表面传热、表面蒙皮摩擦以及具有真实分量粗糙度的表面流动的雷诺类比 PI：Phillip Ligrani 摘要该项目重点关注基础研究，将流路表面的摩擦和热效应与实际应用中的“真实”详细表面粗糙度联系起来。 这些包括内部涡轮机翼型件冷却通道、外部涡轮机翼型件表面（如燃气涡轮发动机中使用的）和热交换器表面上复杂的、空间变化的粗糙度。 这种粗糙度在增加热负荷、压降、阻力和空气动力损失方面起着重要作用。用于测试的“真实”粗糙表面是使用与实际运行的发动机部件类似的程序和环境来准备的，并且由通用电气公司研究与开发中心和通用电气飞机发动机提供。 实验数据是在内部通道流以及外部翼型上获得的，其雷诺数、马赫数、压力梯度、自由流湍流水平、通道流速、边界层发展和物理尺寸与运行燃气涡轮发动机中存在的数据相同。 两个主要目标是：（i）开发实际应用中遇到的粗糙表面上的流动的粗糙表面雷诺类比，以及（ii）开发新的预测模型以解释边界层数值预测方案中的粗糙度。 作为本研究的一部分获得的结果对于改进表面制造技术的开发也很有用。