Magiawala, K. and Wat, J. and Awad, E. and Culick, F. E. C. and Kubota, T. (1980) Measurements of interactions between acoustic fields and nonuniform mean flow. NASA Reports, NTRS: 2005-10-10. NASA . http://resolver.caltech.edu/CaltechAUTHORS:20101208-114247352
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Two problems crucial to the stability of longitudinal acoustic waves in solid rocket motors are examined experimentally. The first is the dissipation of energy associated with an average flow inward at the lateral boundary. Measurements reported here, though subject to considerable experimental error, show that the actual losses are much larger than predicted by the approximate one dimensional analysis. The second problem is the attenuation of waves accompanying reflection by the nonuniform flow in a choked exhaust nozzle. Empahsis in this work has been on technique, to provide data relatively easily and inexpensively. It appears that good results can be obtained in a routine manner using small supersonic wind tunnel operated as an open cycle. At least for Mach numbers up to 0.04 at the nozzle entrance, difficulties with signal/noise are satisfactorily overcome with a tracking filter.
|Item Type:||Report or Paper (Technical Report)|
|Additional Information:||Unclassified; No Copyright; Unlimited; Publicly available. NASA Center: NASA (non Center Specific). Publication Year: 1980. Added to NTRS: 2005-10-10. Work supported by the Air Force Rocket Propulsion Laboratory. In NASA. Langley Research Center The 17th JANNAF Combust. Meeting, Vol. 1 p 321-336 (SEE N81-16253 07-28). No digital version available. Reference in Nasa Technical Reports Server (NTRS)|
|Group:||Guggenheim Jet Propulsion Center|
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|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||14 Dec 2010 23:02|
|Last Modified:||26 Dec 2012 12:44|
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