국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Task 7-Endwall Treatment Inlet Flow Distortion Analysis Final Report
저자	E.J. Hall, D.A. Topp, N.J. Heidegger, G.S. McNulty, K.F. Weber,
Keyword	Fluid dynamics stall
URL	http://gltrs.grc.nasa.gov/reports/1996/CR-195468.pdf
보고서번호	NASA CR-195468
발행년도	1996
출처	NASA Glenn Research Center
ABSTRACT	The overall objective of this study was to develop a 3-D numerical analysis for compressor casing treatment flowfields, and to perform a series of detailed numerical predictions to assess the effectiveness of various endwall treatments for enhancing the efficiency and stall margin of modern high speed fan rotors. Particular attention was given to examining the effectiveness of endwall treatments to counter the undesirable effects of inflow distortion. Calculations were performed using three different gridding techniques based on the type of casing treatment being tested and the level of complexity desired in the analysis. In each case, the casing treatment itself is modeled as a discrete object in the overall analysis, and the flow through the casing treatment is determined as part of the solution. A series of calculations were performed for both treated and untreated modern fan rotors both with and without inflow distortion. The effectivenss of the various treatments were quantified, and several physical mechanisms by which the effectiveness of endwall treatments is achieved are discussed. This report represents the cumulative efforts of Tasks 6 and 7 under NASA Contract NAS3-25270.