Qualitative analysis and application validation of compound bowing design in turbine cascade with large turning angle
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摘要: 通过定性推导分析了复合弯曲对叶栅吸力面静压分布与端部周向迁移流体折转过程的影响,明确了复合弯曲对大转角高负荷平面涡轮叶栅流场的影响机制,并结合已有仿真结果进行了初步验证。复合弯曲是在反弯叶片吸力面端部进行局部正弯,令叶片压力面反弯、吸力面端部正弯结合叶身反弯的造型方式。研究表明,复合弯曲设计通过改变吸力面低能流体的展向迁移趋势与周向迁移流体的折转趋势抑制了叶栅二次流的发展。一方面,复合弯曲设计调节了叶展中部与叶栅端部附近吸力面逆压梯度与展向静压梯度分布,抑制了吸力面低能流体向脱落涡与壁角涡高损失区的迁移与堆积;另一方面,复合弯曲设计影响了周向迁移流体折转过程,抑制了周向迁移流体向叶栅端部的折转及其折转过程中与吸力面附近流体的掺混。因此,复合弯曲设计能够在常规反弯基础上进一步改善叶栅流场。Abstract: The influence of the compound bowing design was discussed based on theoretical analysis and verified by numerical simulations based on a highly-loaded linear turbine cascade with a large turning angle. The compound bowing design applied local positive bowing design near the endwall region on the suction surface of a negative bowed blade, so the blade presented negative bowed pressure surface and compound bowed suction surface. Generally, the study showed that the compound bowed suction surface could improve the flow field by adjusting the static pressure distribution on suction surface and the deflection of the cross flow. In detail, the negative bowed suction surface could suppress the development of the boundary layer and the shedding vortex near the mid-span, while the positive bowed suction surface could suppress the development of the boundary layer and the Corner Vortex near the endwall. Moreover, the positive bowed suction surface near the endwall could further suppress the passage vortex and the corner vortex by adjusting the deflection of the cross flow and reducing the interaction between the cross flow and boundary layer near the suction surface. As a result, it showed that the compound bowed cascade could lead to a loss coefficient reduction about 65.5% better than the negative bowed one in this study.
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[1] 刘大响,金捷.21世纪世界航空动力技术发展趋势与展望[J].中国工程科学,2004,6(9):1-8. LIU Daxiang,JIN Jie.The development trends and prospect of world aeropropulsion technology in the 21st century[J].Engineering Science,2004,6(9):1-8.(in Chinese) [2] 刘大响.航空发动机技术的发展和建议[J].中国工程科学,1999,1(2):24-28. LIU Daxiang.The development and proposals of aeroengine technology[J].Engineering Science,1999,1(2):24-28.(in Chinese) [3] 张磊.超高负荷跨音速涡轮气动设计理论及其非定常流动特性研究[D]:北京:中国科学院,2011. ZHANG Lei.Investigation of serodynamic design method and unsteady flow characteristics of ultra-highly loaded turbine[D].Beijing:Chinese Academy of Sciences,2011.(in Chinese) [4] 任加万,谭永华.冲压发动机燃烧室热防护技术[J].火箭推进,2006,32(4):38-42. REN Jiawan,TAN Yonghua.Thermal protection techniques of ramjet combustor[J].Journal of Rocket Propulsion,2006,32(4):38-42.(in Chinese) [5] 张浩,李录平,唐学智,等.重型燃气轮机涡轮叶片冷却技术研究进展[J].燃气轮机技术,2017,30(2):1-7. ZHANG Hao,LI Luping,TANG Xuezhi,et al.Review of heavy-duty gas turbine blade cooling technology[J].Gas Turbine Technology,2017,30(2):1-7.(in Chinese) [6] 陈仲光,张志舒,李德旺,等.F119发动机总体性能特点分析与评估[J].航空科学技术,2013(3):39-42. CHEN Zhongguang,ZHANG Zhishu,LI Dewang,et al.Analysis and evaluation of F119 engine overall performance[J].Aeronautical Science and Technology,2013(3):39-42.(in Chinese) [7] 刘大响.一代新材料,一代新型发动机:航空发动机的发展趋势及其对材料的需求[J].材料工程,2017,45(10):1-5. LIU Daxiang.One generation of new material,one generation of new type engine:development trend of aero-engine and its requirements for materials[J].Journal of Materials Engineering,2017,45(10):1-5.(in Chinese) [8] 张磊,雒伟伟,徐静静,等.超高负荷跨音速涡轮的设计与性能分析研究[J].工程热物理学报,2011,32(10):1651-1654. ZHANG Lei,LUO Weiwei,XU Jingjing,et al.The design and performance analysis of a highly-loaded turbine[J].Journal of Engineering Thermophysics,2011,32(10):1651-1654.(in Chinese) [9] DENTON J D.The 1993 IGTI scholar lecture:loss mechanisms in turbomachines[J].Journal of Turbomachinery,1993,115(4):621-656. [10] COULL J D.Endwall loss in turbine cascades[J].Journal of Turbomachinery,2017,139(8):081004. [11] 张晓辉,陈绍文,李燕飞.基于弯曲叶片的燃气涡轮导叶数值研究[J].推进技术,2016,37(3):443-448. ZHANG Xiaohui,CHEN Shaowen,LI Yanfei.Numerical investigation for curved guide vane in gas turbine[J].Journal of Propulsion Technology,2016,37(3):443-448.(in Chinese) [12] 刘鹏飞,高杰,牛夕莹,等.大子午扩张变几何涡轮可调叶片端区设计优化[J].航空动力学报,2017,32(3):558-567. LIU Pengfei,GAO Jie,NIU Xiying,et al.Design and optimization of end zone of large meridional expansion adjustable blades on variable geometry turbine[J].Journal of Aerospace Power,2017,32(3):558-567.(in Chinese) [13] 黄镜玮,孟福生,宋义康,等.基于压力场分布的大子午扩张涡轮非轴对称端壁造型方法[J].航空动力学报,2020,35(5):160-174. HUANG Jingwei,MENG Fusheng,SONG Yikang,et al.Non-axisymmetric endwall modeling for large meridional expansion turbines based on pressure field distribution[J].Journal of Aerospace Power,2020,35(5):160-174.(in Chinese) [14] SONG Liming,GUO Zhendong,LI Jun,et al.Optimization and knowledge discovery of a three-dimensional parameterized vane with nonaxisymmetric endwall[J].Journal of Propulsion and Power,2018,34(1):234-246. [15] 魏佐君,乔渭阳,赵磊,等.基于水滴型带状前缘的涡轮端区损失控制数值研究[J].航空动力学报,2015,30(2):473-482. WEI Zuojun,QIAO Weiyang,ZHAO Lei,et al.Numerical investigation of endwall losses control in turbine by leading edge fillet based on teardrop curves[J].Journal of Aerospace Power,2015,30(2):473-482.(in Chinese) [16] RUBECHINI F,GIOVANNINI M,ARNONE A,et al.Reducing secondary flow losses in low-pressure turbines with blade fences:Part Ⅰ design in an engine-like environment[R].ASME Paper GT2019-91280,2019. [17] GIOVANNINI M,RUBECHINI F,AMATO G,et al.Reducing secondary flow losses in low-pressure turbines with blade fences:Part Ⅱ experimental validation on linear cascades[R].ASME Paper GT2019-91284,2019. [18] WANG Zhongqi,LAI ShengKai,XU Wenyuan.Aerodynamic calculation of turbine stator cascades with curvilinear leaned blades and some experimental results[R].Bangalore,India:ISABE,1981. [19] 王仲奇,苏杰先,钟兢军.弯扭叶片栅内减少能量损失机理研究的新进展[J].工程热物理学报,1994,15(2):147-152. WANG Zhongqi,SU Jiexian,ZHONG Jinjun.New investigation of the curved and twisted blade in reducing energy loss[J].Journal of Engineering Thermophysics,1994,15(2):147-152.(in Chinese) [20] 韩万金,吕红卫,芦文才,等.高负荷叶片弯曲对壁面流动的影响[J].航空动力学报,1995,10(2):175-178. HAN Wanjin,LV Weihong,LU Wencai et al.The influence of bowing design on the wall flow in highly-loaded cascade[J].Journal of Aerospace Power,1995,10(2):175-178.(in Chinese) [21] TAN Chunqing,ZHANG Hualiang,CHEN Haisheng,et al.Flow fields and losses downstream of an ultra-highly loaded turbine cascade with bowed blades[J].Journal of Power and Energy,2011,225(1):131-140. [22] 安柏涛,韩万金,王仲奇.弯叶片降低损失机理的实验研究[J].热能动力工程,2000,15(5):498-501. AN Baitao,HAN Wanjin,WANG Zhongqi.Experimental study of the mechanism of energy loss reduction for curved blades[J].Journal of Engineering for Thermal Energy and Power,2000,15(5):498-501.(in Chinese) [23] 顾忠华,冯国泰,王松涛,等.涡轮动叶采用弯叶片的数值模拟及流场结构分析[J].工程热物理学报,2001,22(5):572-574. GU Zhonghua,FENG Guotai,WANG Songtao,et al.Analysis of bowed rotor in gas turbine with numerical simulation[J].Journal of Engineering Thermophysics,2001,22(5):572-574.(in Chinese) [24] 谭春青,张华良,陈海生,等.弯叶片对大转角平面涡轮叶栅气动性能影响的实验研究[J].燃气涡轮试验与研究,2009,22(1):8-12. TAN Chunqing,ZHANG Hualiang,CHEN Haisheng,et al.Experimental investigation of the aerodynamic performance of bowed blades in high-turning linear turbine cascades[J].Gas Turbine Experiment and Research,2009,22(1):8-12.(in Chinese) [25] TAN Chunqing,ZHANG Hualiang,CHEN Haisheng,et al.Blade bowing effect on aerodynamic performance of a highly loaded turbine cascade[J].Journal of Propulsion and Power,2010,26(3):604-608. [26] 谭春青,张华良,董学智,等.在高负荷涡轮叶栅中应用弯叶片控制流动分离的实验研究[J].工程热物理学报,2009,30(9):1467-1471. TAN Chunqing,ZHANG Hualiang,DONG Xuezhi,et al.A numerical investigation of application of bowed blade to control flow separation on highly loaded turbine cascades[J].Journal of Engineering Thermophysics,2009,30(9):1467-1471.(in Chinese) [27] XUE Xingxu,WANG Songtao,LUO Lei,et al.The compound bowing design in a highly loaded linear cascade with large turning angle[J].Journal of Aerospace Engineering,2020,234(16):2323-2336. [28] 王仲奇,郑严.叶轮机械弯扭叶片的研究现状及发展趋势[J].中国工程科学,2000,2(6):40-48. WNAG Zhongqi,ZHENG Yan.Research status and development of the bowed-twisted blade for turbomachines[J].Strategic Study of CAE,2000,2(6):40-48.(in Chinese) [29] 罗磊.小流量涡轴发动机涡轮气动及冷却技术研究[D]:哈尔滨:哈尔滨工业大学,2012. LUO Lei.The research of turbine aerodynamic and cooling technology in a small flow turboshaft engine[D]:Harbin:Harbin Institute of Technology,2012.(in Chinese) [30] CHESTER N L,WELLS M A,PRODANOVIC V.Effect of inclination angle and flow rate on the heat transfer during bottom jet cooling of a steel plate[J].Journal of Heat Transfer,2012,134(12):122201.1-122201.9.
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