不同叶高水平的透平叶片气动特性分析  

Research on the aerodynamic characteristics of turbine blades with different heights

作　　者：杨长柱 范立云[1] 张瀚文[1] 陈硕 陈阳 钟主海[2] YANG Changzhu;FAN Liyun;ZHANG Hanwen;CHEN Shuo;CHEN Yang;ZHONG Zhuhai(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China;Dongfang Steam Turbine Co.,Ltd.,China Eastern Electric Group Co.Ltd.,Deyang 618000,China)

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [2]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《哈尔滨工程大学学报》2024年第8期1552-1558,共7页Journal of Harbin Engineering University

基　　金：国家科技重大专项项目(2017-V-0005-0055).

摘　　要：为了能够通过CFD手段优化透平叶片气动性能,本文使用雷诺平均方法针对工程上应用的66、44以及22 mm共3种典型叶高水平的透平模型进行了数值模拟,并将计算结果同实验测量结果进行了对比。同时,使用大涡模拟数值方法对22 mm叶高的模型进行非定常计算,得到了与实验结果吻合更好的等熵效率、质量流量等流场宏观参数,在三维流场上透平叶片的叶根与叶顶处的流动更为复杂。研究结果表明:雷诺平均方法可以对66和44 mm叶高的透平模型进行较准确的评估,对于22 mm叶高的透平,只有大涡模拟方法才能够清晰地捕捉到端壁区域紊乱的流动细节。叶片端部区域损失较大,雷诺平均方法处理得到的短叶片端壁区域丢失了流动的脉动细节,导致无法进行准确计算其端壁区域的流动。To optimize the aerodynamic performance of turbine blades by CFD method,using the Reynolds-averaged Navier-Stokes method,numerical simulations were conducted for three typical turbine models with blade heights of 66,44,and 22 mm,which are commonly encountered in engineering applications.The computational results were compared with experimental measurements.Additionally,through a numerical simulation method-large eddy simulation,unsteady calculations were performed for the 22 mm blade height model,and the results agreed well with experimental data in terms of isentropic efficiency,mass flow rate,and other macroscopic flow parameters.In the three-dimensional flow field,the flow at the root and tip of the turbine blades exhibited more complexity.The research findings indicate that the Reynolds-averaged Navier-Stokes method can provide reasonably accurate assessments for turbine models with blade heights of 66 and 44 mm.However,for the 22 mm blade height turbine,only the large eddy simulation method could effectively capture the turbulent flow details near the end-wall region.Significant losses were observed in the blade tip region,where the Reynolds-averaged Navier-Stokes method did not accurately capture the pulsating flow details,and thus,the flow near the end-wall region of short blades could not be accurately computed.

关 键 词：旋转机械 透平叶片 不同叶片高度 大涡模拟 雷诺时均纳维斯托克斯方法 计算流体力学 叶片损失 

分 类 号：TK14[动力工程及工程热物理—热能工程]