국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Effect of Sweep on Cavity Flow Fields at Subsonic and Transonic Speeds
저자	Tracy, Maureen B.;; Plentovich, Elizabeth B.;; Hemsch, Michael J.;; Wilcox, Floyd J.
Keyword	CAVITIES;; CAVITY FLOW;; FLOW DISTRIBUTION;; FREE FLOW;; HIGH SPEED;; LEADING EDGE SWEEP;; LEADING EDGES;; MACH NUMBER;; PRESSURE DISTRIBUTION;; STATIC PRESSURE;; SWEEP ANGLE;; TRAILING EDGES;; TRANSONIC SPEED;; WALLS
URL	http://hdl.handle.net/2060/20120009443
보고서번호	NASA/TM-2012-217577
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	An experimental investigation was conducted in the NASA Langley 7 x 10-Foot High Speed Tunnel (HST) to study the effect of leading- and trailing-edge sweep on cavity flow fields for a range of cavity length-to-height (l/h) ratios. The free-stream Mach number was varied from 0.2 to 0.8. The cavity had a depth of 0.5 inches, a width of 2.5 inches, and a maximum length of 12.0 inches. The leading- and trailing-edge sweep was adjusted using block inserts to achieve leading edge sweep angles of 65 deg, 55 deg, 45 deg, 35 deg, and 0 deg. The fore and aft cavity walls were always parallel. The aft wall of the cavity was remotely positioned to achieve a range of length-to-depth ratios. Fluctuating- and static-pressure data were obtained on the floor of the cavity. The fluctuating pressure data were used to determine whether or not resonance occurred in the cavity rather than to provide a characterization of the fluctuating pressure field. Qualitative surface flow visualization was obtained using a technique in which colored water was introduced into the model through static-pressure orifices. A complete tabulation of the mean static-pressure data for the swept leading edge cavities is included.