Investigation of Acoustic and Hydrodynamic Modes in a Two/three-dimensional Incompressible Cavity Flow Using Wall-microphone Arrays

使用壁式麦克风阵列研究二维/三维不可压缩空腔流中的声学和流体动力模式

基本信息

  • 批准号:
    0425374
  • 负责人:
  • 金额:
    $ 15万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Continuing Grant
  • 财政年份:
    2005
  • 资助国家:
    美国
  • 起止时间:
    2005-09-01 至 2009-08-31
  • 项目状态:
    已结题

项目摘要

PROPOSAL NO.: CTS-0425374PRINCIPAL INVESTIGATOR: AHMED NAGUIBINSTITUTION: MICHIGAN STATE UNIVERSITYThis grant supports a study of the wall-pressure and flow modes in a two- and three-dimensional low-Mach-number cavity flows. Self-sustained oscillations occur in a wide variety of practical configurations, including aircraft and naval vessels, openings in automobiles (e.g. sunroofs), and even in the field of hydraulics and civil engineering. A unique feature of the investigation is the resolution of both the frequency and wave number of the wall-pressure modes by employing large sensor arrays at strategically chosen locations. The array measurements will be coupled with simultaneous flow-field measurements using Particle Image Velocimetery (PIV) to obtain time-resolved estimation of the pseudo-instantaneous flow structure via multi-point wall-pressure-based stochastic estimation. Two key flow characteristics are emphasized in these experiments: (1) wave number-frequency spectra of the wall-pressure on the cavity bottom and associated dispersion relation (convection velocity versus frequency); (2) three-dimensionality of the flow structure in the vicinity of the impingement lip. The influence of various cavity geometrical parameters on these characteristics will be investigated during the first year. In the second year, effects of the separating boundary layer properties will be examined, while the third year will be dedicated to examining the significance of mean-flow three-dimensionality. The project capitalizes on several existing resources that have been enabled by a previously awarded NSF project. Execution of this project will result in the training of one Ph.D. student. The PI intends to involve an undergraduate student in the research, hopefully leading to her/his recruitment to graduate school. Moreover, existing programs at Michigan State University will be utilized to include a high-school student in the team during the summer, demonstrating to him/her the excitement of the process of research and discovery.
提案编号: CTS-0425374主要制造商:AHMED NAGUIB机构: 密歇根州立大学该基金支持对二维和三维低马赫数空腔流的壁面压力和流动模式的研究。 自持振荡发生在各种各样的实际配置中,包括飞机和海军船只、汽车中的开口(例如天窗),甚至在液压和土木工程领域。 一个独特的功能的调查是分辨率的频率和波数的壁压模式,采用大型传感器阵列在战略选择的位置。 阵列测量将与使用粒子图像测速仪(PIV)的同步流场测量相结合,以通过基于多点壁压的随机估计获得伪瞬时流结构的时间分辨估计。在这些实验中,强调了两个关键的流动特性:(1)在空腔底部的壁面压力的波数频谱和相关的色散关系(对流速度与频率);(2)在冲击唇附近的流动结构的三维。第一年将研究各种腔体几何参数对这些特性的影响。第二年将研究分离边界层特性的影响,而第三年将致力于研究平均流三维性的意义。 该项目利用了先前授予NSF项目的几个现有资源。 该项目的实施将培养一名博士。学生. PI打算让一名本科生参与研究,希望能将其招募到研究生院。此外,密歇根州立大学的现有项目将被用来在夏季期间将一名高中生纳入团队,向他/她展示研究和发现过程的兴奋。

项目成果

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Ahmed Naguib其他文献

Time-resolved visualization of an impinging jet subjected to bi-modal forcing
受到双模态强迫作用的撞击射流的时间分辨可视化
  • DOI:
    10.1007/s12650-023-00950-2
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    1.7
  • 作者:
    Basil Abdelmegied;Ahmed Naguib
  • 通讯作者:
    Ahmed Naguib
A chromosome-length assembly of the Hawaiian Monk seal (Neomonarchus schauinslandi) confirms genomic stability in the Pinnipeds and a prolonged history of “genetic purging”
夏威夷僧海豹(Neomonarchus schauinslandi)的染色体长度组装证实了鳍足类动物的基因组稳定性和“基因清除”的悠久历史
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    David W. Mohr;Stephen J. Gaughran;J. Paschall;Ahmed Naguib;Andy Wing Chun Pang;O. Dudchenko;Erez Lieberman Aiden;D. Church;A. F. Scott
  • 通讯作者:
    A. F. Scott
EVALUATION OF DIFFERENT CURING ENERGIES ON SOME PROPERTIES OF TWO RECENT RESINS COMPOSITE
不同固化能对两种新型树脂复合材料某些性能的评价
  • DOI:
    10.21608/ajdsm.2017.107822
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    3.4
  • 作者:
    Ahmed Naguib;M. Fayed;Saad El
  • 通讯作者:
    Saad El
Performance evaluation of an encrypted color image transmission over wireless network with different chaotic-based techniques
  • DOI:
    10.1007/s12596-023-01093-1
  • 发表时间:
    2023-01-06
  • 期刊:
  • 影响因子:
    2.500
  • 作者:
    Ahmed Naguib;Walid El‑Shafai;Mona Shokair
  • 通讯作者:
    Mona Shokair

Ahmed Naguib的其他文献

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{{ truncateString('Ahmed Naguib', 18)}}的其他基金

Novel flow control strategies for heat transfer enhancement in a minimal array of impinging jets
用于在最小冲击射流阵列中增强传热的新型流量控制策略
  • 批准号:
    1603720
  • 财政年份:
    2016
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
Collaborative Research: IDR-Model-based Feedback Control of Transient Growth in a Laminar Boundary Layer: Bridging the Gap between CFD and Experiments
合作研究:基于 IDR 模型的层流边界层瞬态生长反馈控制:弥合 CFD 与实验之间的差距
  • 批准号:
    0932546
  • 财政年份:
    2009
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
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
美国-埃及合作研究:半封闭冲击射流中静止和振荡冲击板附近的流动结构研究
  • 批准号:
    0611984
  • 财政年份:
    2007
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
US-Egypt Cooperative Research: Experimental and Computational Investigation of Wall-Pressure Fluctuation in Shear Layers with Strong and Weak Feedback Effects
美埃合作研究:强反馈效应和弱反馈效应剪切层壁压脉动的实验和计算研究
  • 批准号:
    0242991
  • 财政年份:
    2003
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant
Characterization of the Flow Structure and its Spatio-Temporal Surface-Stress Signature in Excited Separating/Reattaching Three-Dimensional Boundary layers
激发分离/再附着三维边界层中流动结构及其时空表面应力特征的表征
  • 批准号:
    0116907
  • 财政年份:
    2001
  • 资助金额:
    $ 15万
  • 项目类别:
    Continuing Grant
Special Foreign Currency Award (22,160 Egyptian Pounds) For Study of Metabolic Reactions in Fungi.
真菌代谢反应研究特别外币奖(22,160 埃及镑)。
  • 批准号:
    7415375
  • 财政年份:
    1975
  • 资助金额:
    $ 15万
  • 项目类别:
    Standard Grant

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