可调高压导叶对1+1/2对转涡轮性能影响的数值研究
Effects of high-pressure guide vane adjustment on 1+1/2 counter-rotating turbine
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摘要: 对1+1/2对转涡轮高压导叶转动不同角度后不同落压比时的涡轮性能进行了数值计算和分析,获得了不同导叶开度和不同落压比对涡轮性能影响的关系曲线.结果表明,高压导叶转角的变化可以有效地调节1 1/2对转涡轮的流量;当导叶打开时,随着落压比的变化涡轮效率存在一个峰值,当导叶关闭时,涡轮效率随落压比的减小持续降低,并且降低的幅度更加明显;当涡轮压比较低时,导叶开大时的涡轮效率略高于导叶未动时的效率,并且随着落压比的进一步降低,差异更加明显,这与文献中常规涡轮导叶调整后涡轮效率均会降低明显不同;在保证效率和功量的前提下,高压导叶开大对于1 1/2对转涡轮高低压级出功比保持在合理范围内是有利的.Abstract: A detailed numerical simulation was carried out to investigate the 1+1/2 counter-rotating turbine performance with different openings of high-pressure guide vane and turbine expansion ratios.By analyzing the results,the variable high-pressure vane could effectively control the massflow of 1 1/2 counter-rotating turbine; when the high-pressure guide vane was opened,there was a peak turbine efficiency with the change of the expansion ratio,when the high-pressure guide vane was closed,the efficiency decreased steadily with the reduced expansion ratio,and the efficiency reduced more quickly than that when the high-pressure guide vane was opened; in the case of the lower expansion ratio,the efficiency improved with the increase of the opening of the high-pressure guide vane,and the improvement was more obvious with the decrease of expansion ratio,which is significantly different from the efficiency of conventional turbine that generally decreases in the variable guide vane; the results show that the opened high-pressure guide vane is favorable for the specific work ratio(SWR) of high-pressure turbine to that of low-pressure turbine remained within reasonable limits.
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[1] Sotsenko Y V.Thermogasdynamic effects of the engine turbines with the countra-rotating rotors[R].ASME Paper 90-GT-63,1990. [2] Ponomariov B A,Sotsenko Y V.Using contra-rotating rotors for decreasing sizes and component number in small GTE[R].ASME Paper 92-GT-414,1992. [3] Haldeman C W,Dunn M G,Abhari R S.Experimental and computational investigation of the time-average and time-resolved pressure loading on a vaneless counter-rotating turbines[R].ASME Paper 2000-GT-0445,2000. [4] 蔡睿贤.对转涡轮基本分析[J].航空学报,1992,13(1):57-63. CAI Ruixian.Basic analysis of counter-rotating turbine[J].Acta Aeronautica et Astronautica Sinica,1992,13(1):57-63.(in Chinese) [5] 季路成,钟文涛,徐建中.关于1+1/2对转涡轮的基 本分析和初步设计[J].工程热物理学报,2001,22(2):167-170. JI Lucheng,ZHONG Wentao,XU Jianzhong.Primary analysis and design of a vaneless counter-rotating turbine[J].Journal of Engineering Thermophysics,2001,22(2):167-170.(in Chinese) [6] 季路成,黄海波,徐建中,等.1 1/2对转涡轮应用中的关键技术问题[J].工程热物理学报,2003,24(1):35-38. JI Lucheng,HUANG Haibo,XU Jianzhong,et al.The key techniques in utilizing vaneless counter-rotating turbine[J].Journal of Engineering Thermophysics,2003,24(1):35-38.(in Chinese) [7] 季路成,肖翔,陈江.1 1/2对转涡轮设计及控制方法探索[J].工程热物理学报,2004,25(3):405-407. JI Lucheng,XIAO Xiang,CHEN Jiang.Numerical investigations about the vaneless counter-rotating turbine for the cold-air test[J].Journal of Engineering Thermophysics,2004,25(3):405-407.(in Chinese) [8] 张惠.1 1/2对转涡轮流动特性分析及其气膜冷却流动机理研究[D].北京:中国科学院研究生院(工程热物理研究所),2008. ZHANG Hui.Investigation on flow characteristics and film-cooling mechanism in a 1 1/2 counter-rotating turbine[D].Beijing:Graduate University of Chinese Academy of Sciences (Institute of Engineering Thermophysics),2008.(in Chinese) [9] 赵庆军,王会 社,赵晓路,等.涡轮转速对无导叶对转涡轮流动特性的影响[J].工程热物理学报,2007,28(6):925-928. ZHAO Qingjun,WANG Huishe,ZHAO Xiaolu,et al.Influence of rotor speeds on flow characteristics in a vaneless counter-rotating turbine[J].Journal of Engineering Thermophysics,2007,28(6):925-928.(in Chinese) [10] 王会 社,张永军,赵庆军,等.背压对缩放型流道涡轮动叶激波结构的影响[J].工程热物理学报,2009,30(8):1299-1302. WANG Huishe,ZHANG Yongjun,ZHAO Qingjun,et al.Numerical simulation of shock systems in converging-diverging nozzle rotor turbine stage with different outlet static pressure[J].Journal of Engineering Thermophysics,2009,30(8):1299-1302.(in Chinese) [11] 邱超,宋华芬.变几何涡轮的损失研究[J].燃气轮机技术,2007,20(01):39-42. QIU Chao,SONG Huafen.Loss research of variable geometry turbine[J].Gas Turbine Technology,2007,20(1):39-42.(in Chinese) [12] Yue G Q,Yin S Q,Zheng Q,et al.Numerical simulation of flowfields of variable geometry turbine with spherical endwalls or nonuniform clearance[R].ASME Paper 2009-GT-59737,2009. [13] 胡松岩.变几何涡轮及其设计特点[J].航空发动机,1996(3):21-26. HU Songyan.Variable geometry turbine and design characteristics[J].Aeroengine,1996(3):21-26.(in Chinese) [14] QIU Chao,SONG Huafen,WANG Yonghong,et al.Performance estimation of variable geometry turbines[J].Proceedings of the Institution of Mechanical Engineers Part A:Journal of Power and Energy,2009,223(A4):441-449. [15] Cells C,Pinto P D R,Barbosa R S,et al.Modeling of variable inlet guide vanes affects on a one shaft industrial gas turbine used in a combined cycle application[R].ASME Paper 2008-GT-50076,2008.
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