국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Tip Vortex and Wake Characteristics of a Counterrotating Open Rotor
저자	VanZante, Dale E.;; Wernet, Mark P.
Keyword	ACOUSTICS;; FLOW CHARACTERISTICS;; NOISE GENERATORS;; ROTOR AERODYNAMICS;; TURBULENCE;; VELOCITY DISTRIBUTION;; VELOCITY MEASUREMENT;; VORTICES;; WAKES
URL	http://hdl.handle.net/2060/20120016637
보고서번호	NASA/TM-2012-217713
발행년도	2012
출처	NTRS (NASA Technical Report Server)
ABSTRACT	One of the primary noise sources for Open Rotor systems is the interaction of the forward rotor tip vortex and blade wake with the aft rotor. NASA has collaborated with General Electric on the testing of a new generation of low noise, counterrotating Open Rotor systems. Three-dimensional particle image velocimetry measurements were acquired in the intra-rotor gap of the Historical Baseline blade set. The velocity measurements are of sufficient resolution to characterize the tip vortex size and trajectory as well as the rotor wake decay and turbulence character. The tip clearance vortex trajectory is compared to results from previously developed models. Forward rotor wake velocity profiles are shown. Results are presented in a form as to assist numerical modeling of Open Rotor system aerodynamics and acoustics.