高负荷单级风扇的高空高速特性研究  

Study of high-altitude and high-speed performance of a highly loaded single stage fan

作　　者：李少伟[1] 王如根[1] 

机构地区：[1]空军工程大学航空航天工程学院,陕西西安710038

出　　处：《合肥工业大学学报（自然科学版）》2013年第9期1038-1041,共4页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(50906100)

摘　　要：为适应飞机对高超音速的要求及高超音速飞行器的发展,文章利用NUMECA三维数值仿真软件,对某型高负荷单级风扇进行地面和高空20km、Ma为4的2种工况性能评估和流场分析。结果表明:从地面标准条件升至高空高速条件后,风扇流量衰减37%,峰值压比下降36%,峰值效率增大6.25%;风扇进口来流衰减为亚音速流,导致通过激波增压的超音速叶栅对来流的加功增压能力急剧下降,进而引起整级风扇性能的下降。According to high-Mach requirements of aircraft and the development of high-Mach aerial ve- hicle, a highly loaded single stage fan on 0 kin-0 Mach and 20 kin-4 Mach operating conditions were simulated using three-dimensional numerical simulation software NUMECA. The results show that from the standard condition to high-altitude and high-speed condition, the mass flow of fan decreased by 37 %, the peak pressure radio decreased by 36%, and the peak efficiency increased by 6.25 %. Be- sides, the mass flow of fan inlet becomes subsonic, which results in the boosting ability of supersonic cascade rapidly decreasing and the performance of the whole fan reducing.

关 键 词：高超音速 高负荷风扇 数值仿真 增压原理 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]