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Public reporting brden for this coec iOnof information IS timated to average i hour er rsonse. including 'he time for rlewng intructlon. %eartg II data source gathering anid maintaining the data n ddn € letn and reviewig,f 101 €olion Of Information Send comments reg arding this burden es~timate or any other &S e Of I his collec'tion Of information,(More)
Large-eddy simulations of imperfectly expanded jet flows from a convergent-divergent nozzle with a heated (600K) and a cold jet conditions have been carried out. Mach wave radiation is present outside the jet core and the heated jet shows a much larger density shear-layer spreading than the cold jet. The potential core length is shortened, but the(More)
A jet exhausting over a plate at different distances away from the nozzle was investigated to simulate jets exhausting over airframe surfaces and the jet-ground interaction during take-off and landing operations. A supersonic rectangular nozzle of 2:1 aspect ratio and 1.5 design Mach number was tested with and without the plate. Far-field acoustics from the(More)
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