Helmholtz Resonance of Pitot Pressure Measurements in Impulsive Hypersonic Test Facilities

McGilvray, M., Jacobs, P.A., Morgan, R.G., Gollan, R.J. and Jacobs, C.M. (2009) Helmholtz Resonance of Pitot Pressure Measurements in Impulsive Hypersonic Test Facilities. AIAA Journal, 47 10: 2430-2439. doi:10.2514/1.42543


Author McGilvray, M.
Jacobs, P.A.
Morgan, R.G.
Gollan, R.J.
Jacobs, C.M.
Title Helmholtz Resonance of Pitot Pressure Measurements in Impulsive Hypersonic Test Facilities
Journal name AIAA Journal   Check publisher's open access policy
ISSN 0001-1452
Publication date 2009-10
Year available 2009
Sub-type Article (original research)
DOI 10.2514/1.42543
Volume 47
Issue 10
Start page 2430
End page 2439
Total pages 10
Editor Friedmann, Peretz P
Baden-Campbell, Michael
Place of publication United States
Publisher American Institute of Aeronautics and Astronautics, Inc.
Collection year 2010
Language eng
Subject C1
880399 Aerospace Transport not elsewhere classified
090107 Hypersonic Propulsion and Hypersonic Aerodynamics
Abstract Experimental pitot pressure measurements in impulse facilities have typically had large-scale harmonic fluctuations associated with them. A combined experimental and numerical approach is used to investigate if a Helmholtz resonance is created from the shrouding that protects the pressure sensor from particle impact, rather than from disturbances being present in the freestream. To verify this experimentally, hydraulic oil was used to change the sound speed in the cavity. Numerical calculations of the pitot probe were used to show that both the steady and the expected transient inflow cause a Helmholtz resonance of similar period. However, a 5% isothermal level of freestream noise was required to match the experimental fluctuation levels. Viscous effects were also shown to be significant during the initial transient response of the pressure measurement. A new pilot probe design was successfully tested and shown to be able to reduce the magnitude and period of the fluctuations.
Keyword FORWARD-FACING CAVITY
flow
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
 
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Created: Fri, 09 Apr 2010, 09:09:28 EST by Rose Clements on behalf of School of Mechanical and Mining Engineering