Aeroacoustics of High-Speed Jet Impingement

CASCADE Technologies is proposing to use CharLES, its in-house unstructured large eddy simulation technology (LES), to simulate the flow and noise emitted from supersonic impinging jets. This problem is relevant to noise of combat aircrafts designed for Short Takeoff and Vertical landing (STOVL) as well as interaction of propulsive jets with Jet Blast Deflectors (JBD) on an aircraft carrier deck. To demonstrate the prediction capabilities of CharLES, a supersonic jet issuing from nozzle and impinging on a ground plane will be considered in Phase I; LES results will be validated against the experimental measurements of the STOVL supersonic facility at the Florida State University. In addition, a proof of concept LES of JBD interacting with a propulsive high-speed jet will be carried out in Phase I. In the option phase, we will study a heated jet as well as the effect of nozzle distance from the ground. Phase II will focus on further development and demonstration of LES and acoustic prediction tools for impinging jet aeroacoustics with realistic geometry such as twin nozzles, part of airframe, ground plane and jet blast deflector. During this Phase, CASCADE will collaborate with GE on modeling propulsive jet-JBD interaction flow and aeroacoustics.