국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	DYNAMIC INLET DISTORTION PREDICTION WITH A COMBINED COMPUTATIONAL FLUID DYNAMICS AND DISTORTION SYNTHESIS APPROACH
저자	W. P. Norby, J. A. Ladd and A. J. Yuhas
Keyword	Computational fluid dynamics; Distortion synthesis; F/A-18 airplane; Inlet; Inlet distortion
URL	http://www.dfrc.nasa.gov/DTRS/1996/PDF/H-2129.pdf
보고서번호	NASA-CR-198053
발행년도	1996
출처	NASA Dryden Flight Research Center
ABSTRACT	A procedure has been developed for predicting peak dynamic inlet distortion. This procedure combines Computational Fluid Dynamics (CFD) and distortion synthesis analysis to obtain a prediction of peak dynamic distortion intensity and the associated instantaneous total pressure pattern. A prediction of the steady state total pressure pattern at the Aerodynamic Interface Plane is first obtained using an appropriate CFD flow solver. A corresponding inlet turbulence pattern is obtained from the CFD solution via a correlation linking root mean square (RMS) inlet turbulence to a formulation of several CFD parameters representative of flow turbulence intensity. This correlation was derived using flight data obtained from the NASA High Alpha Research Vehicle flight test program and several CFD solutions at conditions matching the flight test data. A distortion synthesis analysis is then performed on the predicted steady state total pressure and RMS turbulence patterns to yield a predicted value of dynamic distortion intensity and the associated instantaneous total pressure pattern.