Effect of Leading Edge Little Blade on Performance of Highly Loaded Compressor Cascades
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摘要: 针对压气机叶栅角区流动易分离的特点,提出一种在叶栅前缘安装小叶片来抑制角区分离的新型流动控制方法。在利用叶栅试验数据确认数值模拟的可靠性后,对不同攻角下安装小叶片前后叶栅的流场特性进行了数值研究。结果表明:在-6°到9°攻角范围内小叶片改善了扩压叶栅的气动性能,使得总压损失减小,静压升增大。小叶片能使叶栅角区前缘分离点后移,角区分离线后的反流区面积减小,改善了角区流动;更多的流体汇聚到中间叶高,增强叶中部载荷,提高了叶栅的扩压能力。Abstract: Because of the flow separation of the corner region of compressor cascade, a little blade installed in leading edge of cascades was proposed to control the separation of corner region. After confirming the reliability of numerical simulation method with experimental data, numerical simulations were carried out to explore the effects of little blade on the performance of cascade. The results show that the aerodynamic performance at the attack angle range of -6° and 9° is improved by the use of little blade. It also decreases the total pressure loss, arises the static pressure ratio. Furthermore, little blade makes leading edge separation point of cascades corner move back, the area of the reverse flow is decreased and corner flow is improved. More fluid converges to middle of cascade, which improves the diffusion capacity of the cascade.
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Key words:
- compressor cascades /
- little blade /
- flow control /
- flow separation
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[1] 陈矛章.风扇/压气机技术发展和对今后工作的建议[J].航空动力学报,2002,17(1):1-15 Chen M Z. Development of fan/compressor techniques and suggestions on further researches[J]. Journal of Aerospace Power, 2002,17(1):1-15(in Chinese) [2] 张燕峰.高载荷压气机端壁流动及其控制策略研究[D].西安:西北工业大学,2010 Zhang Y F. Investigation of endwall flow behavior and its control strategies in highly loaded compressor[D]. Xi'an:Northwestern Polytechnical University, 2010(in Chinese) [3] 陈懋章,刘宝杰.风扇/压气机气动设计技术发展趋势-用于大型客机的大涵道比涡扇发动机[J].航空动力学报,2008,23(6):961-975 Chen M Z, Liu B J. Fan/compressor aero design trend and challenge on the development of high bypass ratio turbofan[J]. Journal of Aerospace Power, 2008,23(6):961-975(in Chinese) [4] Wisler D C. Loss reduction in axial-flow compressors through low-speed model testing[J]. Journal of Engineering for Gas Turbines and Power, 1985,107(2):354-363 [5] Behlke R F. The development of a second generation of controlled diffusion airfoils for multistage compressors[J]. Journal of Turbomachinery, 1991,108(1):32-40 [6] Kang S. Investigation on the three-dimensional flow within a compressor cascade with and without tip clearance[D]. Brussel:Vrije University Brussel, 1993 [7] Wennerstrom A J, Frost G R. Design of a rotor incorporating splitter vanes for a high pressure ratio supersonic axial compressor stage[R]. USA:United States Air Force Systems Command, 1974 [8] 严明,陈懋章.大小叶片轴流压气机转子流动特性分析[J].推进技术,2002,23(4):280-282 Yan M, Chen M Z. Flow performance analysis in an axial compressor rotor with splitter[J]. Journal of Propulsion Technology, 2002,23(4):280-282(in Chinese) [9] 王洪伟,蒋浩康,陈懋章.大小叶片压气机平面叶栅试验研究[J].工程热物理学报,2006,27(S1):113-116 Wang H W, Jiang H K, Chen M Z. Experimental investigation of splitter compressors in a planar cascade[J]. Journal of Engineering Thermophysics, 2006,27(S1):113-116(in Chinese) [10] 赛庆毅,朱源嘉,杨爱玲,等.大小叶片扩压叶栅气动性能与流动结构实验研究[J].动力工程学报,2013,33(11):847-852 Sai Q Y, Zhu Y J, Yang A L, et al. Experimental study on aerodynamic performance and flow structure of a diffuser cascade with splitter blades[J]. Journal of Chinese Society of Power Engineering, 2013,33(11):847-852(in Chinese) [11] 杨小贺,单鹏.大小叶片轴流级反问题设计及数值模拟[J].航空学报,2011,32(10):1786-1795 Yang X H, Shan P. Inverse design of splittered axial compressor and numerical simulation[J]. Acta Aeronautica et Astronautica Sinica, 2011,32(10):1786-1795(in Chinese) [12] Hoeger M, Baier R D, Fischer S, et al. High turning compressor tandem cascade for high subsonic flows, Part 1:aerodynamic design[C]//47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. San Diego, California:AIAA, 2011 [13] Müller L, Kožulovic' D, Wulff D, et al. High turning compressor tandem cascade for high subsonic flows-part 2:numerical and experimental investigations[C]//47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit. San Diego, California:AIAA, 2011 [14] 魏巍,刘波,曹志远,等.高负荷小型压气机大弯角串列静子特性[J].航空动力学报,2013,28(5):1066-1073 Wei W, Liu B, Cao Z Y, et al. Characteristics of high-turning tandem stator in highly loaded small compressor[J]. Journal of Aerospace Power, 2013,28(5):1066-1073(in Chinese) [15] 刘志刚,梁俊,凌代军,等.串列叶栅流场特性的试验与数值模拟[J].热能动力工程,2013,28(5):449-454 Liu Z G, Liang J, Ling D J, et al. Experimental and numerical study of the flow field characteristics of a tandem cascade[J]. Journal of Engineering for Thermal Energy and Power, 2013,28(5):449-454(in Chinese)
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