@proceedings {donald2012acoustic,    
	title = {Acoustic characterization of sub-scale rocket nozzles},
	journal = {50th AIAA Aerospace Sciences Meeting and Exposition},
	year = {2012},
	publisher = {AIAA Paper 2012-0544},
	address = {Nashville, Tennessee USA}, 
	abstract = {<p>During launch, space vehicles are subject to violent vibro-acoustic loads caused by the intense sound pressure levels and transient side-loads produced during rocket engine ignition. A recent study conducted at The University of Texas at Austin has focused on characterizing the internal flow and acoustic signature of a thrust-optimized parabolic (TOP) and a truncated ideal contour (TIC) nozzle test article in order to develop a detailed understanding of the mechanisms responsible for producing main engine ignition noise. The studies are conducted for both transient and fixed nozzle pressure ratio (NPR) conditions. The former provides a more realistic representation of the full scale environment, while the latter allows for a statistical characterization of the various sources of main engine ignition (MEI) noise. Time-frequency analysis is performed on transient startup data.</p>},
	author = {Donald, B. W. and Baars, W. J. and Tinney, C. E. and Ruf, J. H.},
	doi = {10.2514/6.2012-544}
}

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