국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	RJTF Mach 8 Testing of a Scramjet Engine Model of a Contraction Ratio of 8.3 with a Strut
저자	Takeshi Kanda, Kenji Kudo, Muneo Izumikawa, Noboru Sakuranaka, Fumiei Ono, Shigeru Satoh
Keyword	scramjet, strut
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001442t.pdf?id=NALTR0001442T
보고서번호	NAL TR-1442T
발행년도	2002.5
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	In order to improve combustion performance in a hydrogen-fueled scramjet research engine model for the Mach 8 flight condition, a thick strut was attached and the contraction ratio was increased to 8.3. According to the result of the gas-sampling at the exit of the model, a combustion efficiency of 90% was attained for the fuel flow rate f = 0.8. Normal fuel injection into the low-velocity region on the top wall, in which the recovery temperature was high, was found to be effective for ignition. The high pressure in the combustor caused by the thick strut was also found to be effective for combustion. The thrust increase from the no-fueled condition was 420 N for f =1.2. The relatively low thrust level was caused by the Rayleigh heating loss and the base drag of the strut. Small amounts of fuel injection upstream of the step changed the combustion condition significantly, however controlled engine operation was difficult to achieve. Parallel fuel injection resulted in very poor combustion for this engine model.