CAJ | 학술논문

采用逆向开槽技术，对三维内乘波式高超声速进气道的低马赫数起动和抗反压能力进行研究，提出了逆向直泄流槽和逆向倒角泄流槽两种方案。数值研究结果表明：逆向泄流槽在三维内乘波式进气道自起动和抗反压过程中起到气动开关作用。进气道不起动或反压过高时，泄流槽处于开启状态；进气道起动后，泄流槽接近气动关闭状态，对进气道总体性能影响较小。两种逆向泄流槽都拓宽了三维内乘波式进气道的低马赫数起动范围，提高了进气道的抗反压能力。其中，逆向倒角泄流槽比逆向直泄流槽具有更宽的低马赫数起动范围和更强的抗反压能力。
채용역향개조기술，대삼유내승파식고초성속진기도적저마혁수기동화항반압능력진행연구，제출료역향직설류조화역향도각설류조량충방안。수치연구결과표명：역향설류조재삼유내승파식진기도자기동화항반압과정중기도기동개관작용。진기도불기동혹반압과고시，설류조처우개계상태；진기도기동후，설류조접근기동관폐상태，대진기도총체성능영향교소。량충역향설류조도탁관료삼유내승파식진기도적저마혁수기동범위，제고료진기도적항반압능력。기중，역향도각설류조비역향직설류조구유경관적저마혁수기동범위화경강적항반압능력。
Two bleed-slot patterns were applied to the internal waverider-derived hypersonic inlet. Both of them consisted of two parallel slots and reverse to the incoming flow direction. The geometric shapes of the two slot patterns were similar except for the curved chamfer on the slot surface near the inlet wall. Numeri-cal simulations were carried out to examine the influence of bleeding systems on the inlet performance. The results show that reverse bleed slots behave independently on the inlet flow status. When the inlet is un-started or the back-pressure is too high, the bleeding slots are fully opened to receive more spillage. On the other hand, the slots are aerodynamically self-adapted to be closed once the inlet is started, which re-sults in a little effect on the inlet performance. Both straight and chamfered reverse bleed slots can lower the starting Mach number, and increase the back-pressure resistance of the internal waverider-derived hyper-sonic inlet. In particular, the chamfered slots have a better performance than the straight one regarding the capability of back-pressure resistance.