국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Thrust Stand Characterization of the NASA Evolutionary Xenon Thruster (NEXT)
저자	Diamant, Kevin D.;; Pollard, James E.;; Crofton, Mark W.;; Patterson, Michael J.;; Soulas, George C.
Keyword	CHARGED PARTICLES;; CURRENT DENSITY;; ION BEAMS;; ION ENGINES;; PENDULUMS;; PLUMES;; THRUST;; THRUST MEASUREMENT
URL	http://hdl.handle.net/2060/20100042402
보고서번호	NASA/TM-2010-216895
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Direct thrust measurements have been made on the NASA Evolutionary Xenon Thruster (NEXT) ion engine using a standard pendulum style thrust stand constructed specifically for this application. Values have been obtained for the full 40-level throttle table, as well as for a few off-nominal operating conditions. Measurements differ from the nominal NASA throttle table 10 (TT10) values by 3.1 percent at most, while at 30 throttle levels (TLs) the difference is less than 2.0 percent. When measurements are compared to TT10 values that have been corrected using ion beam current density and charge state data obtained at The Aerospace Corporation, they differ by 1.2 percent at most, and by 1.0 percent or less at 37 TLs. Thrust correction factors calculated from direct thrust measurements and from The Aerospace Corporation s plume data agree to within measurement error for all but one TL. Thrust due to cold flow and "discharge only" operation has been measured, and analytical expressions are presented which accurately predict thrust based on thermal thrust generation mechanisms.