국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	Effect of Sides-spillage from Airframe on Scramjet Engine Performance
저자	Kouichiro TANI, Takeshi KANDA, Kenji KUDO, Daisuke AKIHISA
Keyword	scramjet; inlet; spillage; aerospace plane; thrust; payload
URL	http://send.nal.go.jp/send/jpn/dlpdf.php3/naltr0001409t.pdf?id=NALTR0001409T
보고서번호	NAL TR-1409T
발행년도	2000.06
출처	NAL (National Aerospace Laboratory of Japan)
ABSTRACT	Pre-compression by the windward surface of the aerospace plane is necessary for scramjet operation. However, this pre-compression causes spillage from the high-pressure windward surface toward the sides of the plane. In order to examine the effects of this side-spillage, the performance of a scramjet engine was evaluated using a 1-D flow model, and payload to the low earth orbit estimated using an aerospace plane flight simulation. Prior to the simulation, tests with scramjet inlet models were conducted in a Mach 4 wind tunnel to identify the primary features of the side-spillage to assist in the simulation. The models were inclined from the flow direction to simulate the skewed flow near the side of the plane during side-spillage, and the experiments proved that the aerodynamic performance of the inlet was not affected by the inclination for the entrance Mach number given to the models. However, the mass capture ratio decreased due to reduction in the density of airflow as a result of the expansion. In the numerical estimate, side-spillage was modeled not to reduce the performance of the inlet, but to reduce mass flow to the inlet. The resulting decrease in airflow delivered to the engine due to spillage reduced thrust by 15%, while the corresponding payload decreased around 60%. Side fences were effective in preventing spillage.