U.S-Egypt Cooperative Research: Effect of Longitudinal Vortices on Heat Transfer Enhancement

描述：该项目支持布朗大学工程学教授Joseph Liu博士和埃及科学家开罗大学机械工程教授Reda Mankabadi博士的合作。研究了纵向涡度系统下换热的各个方面。这包括当面对不同的前缘结构或边界层中的细粒湍流时，涡度系统的各种表现形式的影响。还将研究流体注入的影响以及由于大温度载荷效应而产生的可压缩性。在其他地方的独立实验工作中，应用程序针对流动和换热配置。使用的方法将包括分析和数值计算，包括频谱和有限差分格式。所提出的研究应该能够更好地理解由流向涡的出现而导致的换热强化，这在热(和材料)传递控制和强化中是必不可少的。在叶轮机械和热交换器的换热问题等应用中，它应该为新设备的设计提供改进。范围：该项目汇集了两位在透平机械分析领域具有长期经验和研究能力的科学家。该合作项目旨在改进热交换器的设计和制造，特别是用于发电站的热交换器，从而为两国减少损失和节约能源做出贡献。这项工作将涉及研究生的参与，并向本科生传播研究背景和成果。该项目符合国际方案司的目标。

Description: This project supports collaboration by Dr. Joseph Liu, Professor of Engineering at Brown University, and an Egyptian scientist: Dr. Reda Mankabadi, Professor of Mechanical Engineering at Cairo University. The research deals with the various facets of heat transfer under longitudinal vorticity systems. This includes the effect of various manifestations of vorticity systems when faced with different leading edge structures or fine-grained turbulence in the boundary layer. The effect of fluid injection as well as compressibility due to large temperature load effects will also be studied. Applications are directed at flow and heat transfer configurations in independent experimental efforts elsewhere. The methods used will include analyses and numerical computations including spectra and finite-difference schemes. The proposed research should provide a better understanding of heat transfer enhancement, resulting from the appearance of streamwise vortices, that is essential in the heat (and material) transfer control and augmentation. It should provide improvement in design of new devices in applications such as heat transfer problems in turbomachinery and heat exchangers. Scope: This project brings together two scientists with long experiences and capabilities in research in the field of turbomachinery analysis. The collaborative project seeks improvements in the design and manufacture of heat exchangers, particularly those used in power stations, and thus contribute to the loss reduction and energy savings in both countries. The work will involve participation of graduate students and dissemination of research background and results to undergraduate students. The project meets the objectives of the Division of International Programs.