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An Experimental Device for Generating High Frequency Perturbations in Supersonic Wind TunnelsThis paper describes the analytical study of a device that has been proposed as a mechanism for generating gust-like perturbations in supersonic wind tunnels. The device is envisioned as a means to experimentally validate dynamic models and control systems designed for high-speed inlets. The proposed gust generator is composed of two flat trapezoidal plates that modify the properties of the flow ingested by the inlet. One plate may be oscillated to generate small perturbations in the flow. The other plate is held stationary to maintain a constant angle-of-attack. Using an idealized approach, design equations and performance maps for the new device were developed from the compressible flow relations. A two-dimensional CFD code was used to confirm the correctness of these results. The idealized approach was then used to design and evaluate a new gust generator for a 3.05-meter by 3.05-meter (10-foot by 10-foot) supersonic wind tunnel.
Document ID
19970009349
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Melcher, Kevin J. (NASA Lewis Research Center Cleveland, OH United States)
Ibrahim, Mounir B. (Cleveland State Univ. Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1996
Subject Category
Research And Support Facilities (Air)
Report/Patent Number
E-10578
NAS 1.15:107385
NASA-TM-107385
Meeting Information
Meeting: International Congress on Fluid Dynamics and Propulsion
Location: Cairo
Country: Egypt
Start Date: December 29, 1996
End Date: December 31, 1996
Sponsors: American Society of Mechanical Engineers, Cairo Univ.
Accession Number
97N14838
Funding Number(s)
PROJECT: RTOP 537-05-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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