U.S.-Egypt Cooperative Research: A Study of The Flow Structures Near a Stationary and an Oscillating Impingement Plate in a Semi-Confined Impinging Jet

描述：该奖项是为了支持密歇根州立大学(MSU)机械工程系Ahmed Naguib博士和埃及开罗国家研究中心(NRC)Abdel-Aziz Able-Fotoh博士的合作研究。他们计划对冲击振荡板的半受限射流的流动结构(涡流)特性进行实验研究，特别是冲击板上的气动载荷(平均和振荡表面压力)。这项研究的动机是撞击式喷气式飞机对两国农业和纺织业潜在应用的重要性。该项目将涉及在核子研究中心设计和建造一个喷气设施，开发撞击板，与麦克风阵列集成，用于测量密歇根州立大学的非稳定表面压力，培训埃及科学家使用麦克风阵列和密歇根州立大学的其他研究仪器，将所有仪器整合到实验仪器中，并进行测量。首先，与流速数据同时采集的表面压力的时空特征将被用于研究冲击板的无振荡流动。在项目的后期阶段，将对摆动板壳进行检查。初级科学家将在PI的监督下进行所有研究活动。智力价值：这项工作有望为流体力学研究做出科学贡献。特别是，这项研究的开创性之处在于包括了一组麦克风，用于解析撞击射流中空间和时间的壁压场。它还涉及冲击板的外部强迫振动。PI和埃及合作者拥有确保这一项目成功所需的专业知识，进行调查所需的实验室设备和设施可在密歇根州立大学和NRC获得，或将使用该项目的资金购买。广泛影响：拟议工作的潜在好处包括：1.培训美国和埃及初级科学家；2.帮助扩大NRC这一领域的研究基础设施；3.启动一所美国大学和一家主要埃及研究机构之间的国际研究伙伴关系；4.受益于两国纺织、钢铁和电子行业等广泛的工程应用。该项目得到了美国-埃及联合基金计划的支持，该计划为两国的科学家和工程师开展这些合作活动提供赠款。

0611984NaguibDescription: This award is to support a cooperative research by Dr. Ahmed Naguib, Department of Mechanical Engineering, Michigan State University (MSU), East Lansing, Michigan and Dr. Abdel-Aziz Abul-Fotoh, National Research Center (NRC), Cairo, Egypt. They plan to undertake an experimental investigation of the characteristics of the flow structures (vortices) in a semi-confined jet flow impinging on an oscillating plate, with particular focus on the aerodynamic loading (mean and oscillating surface pressure) on the impingement plate. The study is motivated by the significance of impinging jets for potential applications relevant to agriculture and textile industry in both countries. The project will involve the design and construction of a jet facility at NRC, development of the impingement plate, integrated with microphone arrays for measuring the unsteady surface pressure at MSU, training of the Egyptian scientists on the use of the microphone array and other research instrumentation at MSU, integration of all instrumentation into the experimental apparatus, and taking measurements. Initially, the spatio-temporal signature of the surface pressure acquired simultaneously with flow-velocity data will be used for investigating the flow without oscillation of the impingement plate. The oscillating-plate case will be examined during the latter part of the project. Junior scientists will conduct all research activities under the supervision of the PI's.Intellectual Merit: This work is expected to result in scientific contribution to fluid dynamics research. In particular, this study pioneers by including an array of microphones for resolving the wall-pressure field in space and time in an impinging jet. It also involves externally imposed oscillation of the impingement plate. The PI and the Egyptian collaborator possess the expertise necessary to ensure the success of this project, and the laboratory equipment and facilities required to conduct the investigation are either available at MSU and NRC or will be acquired using funding from this project.Broader Impact: The potential benefits of the proposed work include: 1. training of US and Egyptian junior scientists; 2. helping expand a research infrastructure in this field at NRC; 3. initiation of an international research partnership between a US university and a major Egyptian research organization; 4. benefiting a wide range of engineering applications including textile, steel and electronics industries in the two countries.This project is being supported under the US-Egypt Joint Fund Program, which provides grants to scientists and engineers in both countries to carry out these cooperative activities.