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기술보고서

기술보고서 게시판 내용
타이틀	SELECTED PERFORMANCE MEASUREMENTS OF THE F-15 ACTIVE AXISYMMETRIC THRUST-VECTORING NOZZLE
저자	John S. Orme and Robert L. Sims
Keyword	Axisymmetric nozzle; Direct thrust measurement; F-15 ACTIVE; Flight tests; Nozzle aerodynamic loads; Nozzle drag; Nozzle flow field; Nozzle performance; Thrust efficiency; Thrust measurement; Thrust vectoring
URL	http://www.dfrc.nasa.gov/DTRS/1999/PDF/H-2339.pdf
보고서번호	H-2339
발행년도	1999
출처	NASA Dryden Flight Research Center
ABSTRACT	Flight tests recently completed at the NASA Dryden Flight Research Center evaluated performance of a hydromechanically vectored axisymmetric nozzle onboard the F-15 ACTIVE. A flight-test technique whereby strain gages installed onto engine mounts provided for the direct measurement of thrust and vector forces has proven to be extremely valuable. Flow turning and thrust efficiency, as well as nozzle static pressure distributions were measured and analyzed. This report presents results from testing at an altitude of 30,000 ft and a speed of Mach 0.9. Flow turning and thrust efficiency were found to be significantly different than predicted, and moreover, varied substantially with power setting and pitch vector angle. Results of an in-flight comparison of the direct thrust measurement technique and an engine simulation fell within the expected uncertainty bands. Overall nozzle performance at this flight condition demonstrated the F100-PW-229 thrust-vectoring nozzles to be highly capable and efficient.