Numerical study on boundary layer suction at throat of a CARET inlet
-
摘要: 以一种CARET(后掠双斜切双压缩面)进气道为研究对象,设计喉道附面层抽吸槽以控制流动分离。采用CFD数值计算软件对进气道在设计点工况下(马赫数为2.0)下内、外流场进行计算,以总压恢复系数和进气道出口总压畸变为评价指标分析不同抽吸方案的效果。结果表明:喉道附面层抽吸能够稳定结尾正激波,削弱激波/附面层干扰,抑制流动分离,显著改善流场,提高总压恢复系数,减小出口畸变;喉道段抽吸槽位置靠前能够明显降低出口畸变;随着抽吸量的增大,附面层抽吸对进气道内特性性能提升的贡献越来越小。Abstract: To control the flow separation of a CARET inlet, the boundary layer suction slots at the throat of the inlet were designed. The commercial CFD software Fluent was used to simulate the flow field at the design point (Mach number of 2.0). Total pressure recovery and distortion at exit of inlet were used to evaluate the effectiveness of different devices. Simulation results indicated that boundary layer suction in throat can fix the normal shock in the throat and form a stable flow field. It can weaken the shockwave/ boundary layer interaction, suppress flow separation, remarkably increase the total pressure recovery and reduce the total pressure distortion at exit surface of inlet. The front placing slots at the throat section can decrease the distortion of exit surface obviously compared with a rear position. As the suction mass flow increased, the inlet performance firstly became better, and then leveled off.
-
[1] 朱宇,李天.CARET 进气道研究综述[J].飞机设计,2003(1):1-6.ZHU Yu,LI Tian.Overview of CARET inlet researches[J].Aircraft Design,2003(1):1-6.(in Chinese) [2] NONWEILER T.Delta wings of shapes amenable to exact shock-wave theory[J].Journal of the Royal Aeronautical Society,1963,67(625):39-40. [3] FLOWER J W.Configurations for high supersonic speeds derived from simple shock-waves and expansions[J].Journal of the Royal Aeronautical Society,1963,67(629):287-290. [4] 何志强,郭荣伟.双斜切双压缩面进气道进口波系结构的数值研究[J].航空学报,1999,20(4):339-342.HE Zhiqiang,GUO Rongwei.Numerical investigation of shock waves at the entrance of dual-swept/dual-ramp inlet[J].Acta Aeronautica et Astronautica Sinica,1999,20(4):339-342.(in Chinese) [5] 钟易成,余少志.尖脊(CARET)进气道地面气动特性试验研究[J].推进技术,2000,21(5):12-15.ZHONG Yicheng,YU Shaozhi.Experimental investigation on gas-dynamic performance of CARET inlet under takeoff condition[J].Journal of Propulsion Technology,2000,21(5):12-15.(in Chinese) [6] 钟易成,余少志,陈晓.涡破碎片控制尖脊进气道总压畸变的试验研究[J].推进技术,2005,26(1):34-37.ZHONG Yicheng,YU Shaozhi,CHEN Xiao.Experimental investigation on caret inlets total pressure distortion controlled by vortex break fence[J].Journal of Propulsion Technology,2005,26(1):34-37.(in Chinese) [7] 钟易成,余少志,陈晓.带尖脊进气口的大 S 弯扩压器流动特性研究[J].航空动力学报,1996,11(4):385-388.ZHONG Yicheng,YU Shaozhi,CHEN Xiao.Experimental investigation on performance of a large S-shaped diffuser with CARET inlet[J].Journal of Aerospace Power,1996,11(4):385-388.(in Chinese) [8] 钟易成,余少志,陈晓.低速来流大攻角侧滑角状态下尖脊进气道气动特性试验研究[J].航空动力学报,2001,16(1):23-27.ZHONG Yicheng,YU Shaozhi,CHEN Xiao.Experimental investigation on gas-dynamic performance of caret inlet inder condition of large attack angles and yaw angles[J].Journal of Aerospace Power,2001,16(1):23-27.(in Chinese) [9] 谭慧俊,郭荣伟.一种双斜切双压缩面进气道性能的数值模拟[J].空气动力学学报,2001,19(3):338-343.TAN Huijun,GUO Rongwei.Numerical simulation of a dual-swept/dual-ramp inlet under ground running[J].Acta Aerodynamica Sinica,2001,19(3):338-343.(in Chinese) [10] 朱宇,李椿萱,李天.后掠压缩斜板进气道进口流场数值研究[J].航空动力学报,2003,18(1):8-14.ZHU Yu,LI Chunxuan,LI Tian.Numerical investigation of inlet with swept compress ramp[J].Journal of Aerospace Power,2003,18(1):8-14.(in Chinese) [11] 朱宇,李椿萱,李天.一种 CARET 进气道超音速特性试验研究[J].航空动力学报,2003,18(2):279-282.ZHU Yu,LI Chunxuan,LI Tian.Experimental studies of a caret inlet at supersonic speed[J].Journal of Aerospace Power,2003,18(2):279-282.(in Chinese) [12] 朱宇,李椿萱,李天.CARET 进气道亚音速气动特性研究[J].北京航空航天大学学报,2003,29(6):512-515.ZHU Yu,LI Chunxuan,LI Tian.Studies of a caret inlet at subsonic speeds[J].Journal of Beijing University of Aeronautics and Astronautics,2003,29(6):512-515.(in Chinese) [13] HALL G R,HURWITZ W M,TIEBENS G S,et al.Development of the F/A-18E/F Air Induction System[R].AIAA 93-2152,1993. [14] 严红明,钟兢军,韩吉昂,等.超声速进气道喉部附面层抽吸[J].推进技术,2009,30(2):175-181.YAN Hongming,ZHONG Jingjun,HAN Jiang,et al.Research on boundary-layer suction in the throat of supersonic inlet[J].Journal of Propulsion Technology,2009,30(2):175-181.(in Chinese) [15] 张华军,郭荣伟,谢旅荣.TBCC 进气道变几何泄流腔研究[J].航空动力学报,2012,27(12):2714-2723.ZHANG Huajun,GUO Rongwei,XIE Lürong.Study of variable geometry bleed cavity of TBCC inlet[J].Journal of Aerospace Power,2012,27(12):2714-2723.(in Chinese) [16] RYU K J,LIM S,SONG D J.A computational study of the effect of angles of attack on a double-cone type supersonic inlet with a bleeding system[J].Computers and Fluids,2011,50(1):72-80. [17] 朱宇.CARET进气道流动机理与设计方法研究[D].北京:北京航空航天大学,2002.ZHU Yu.Studies of flow mechanisms and design methodology for CARET inlets[D].Beijing:Beijing University of Aeronautics and Astronautics,2002.(in Chinese) [18] SAUNDERS J,KEITH J T.Results from computational analysis of a mixed compression supersonic inlet[R].Sacramento,California:the 27th Joint Propulsion Conference,1991.
点击查看大图
计量
- 文章访问数: 524
- HTML浏览量: 2
- PDF量: 484
- 被引次数: 0