Investigation of the Propagation Mechanism of Pressure Fluctuations in Turbulent Flow.
NEW YORK UNIV WESTBURY AEROSPACE AND ENERGETICS LAB
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A wind tunnel facility M 0.6 to 0.8 with extremely low noise levels has been designed, constructed, and tested at the New York University Aerospace and Energetics Laboratory. The facility is to be used for the purpose of investigating the propagation mechanism of pressure fluctuations in turbulent boundary layers. The facility was designed as an induction tunnel in order to minimize the influence of the downstream region of the wind tunnel on the flow field in the test section. This report presents a description of the facility and the flow quality obtained, and a discussion of the instrumentation and experimental procedures being used. The results obtained from the analysis of several measurements are also presented. This includes spectra of the velocity, wall-pressure and wall-shear fluctuations and the results of a digital processing scheme which conditionally samples the fluctuations to obtain a description of turbulent bursts in the boundary layer.
- Fluid Mechanics