涡轮叶片型线结构对叶栅流场的影响研究  

Research on the Effect of Turbine Blade Profile Line Structure on Cascade Flow Field

作　　者：谭春飞[1] 张升峰[1] 张仁龙[2] 于丽维[1] 

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室 [2]中国石油化工股份有限公司石油工程技术研究院

出　　处：《石油机械》2012年第12期6-9,共4页China Petroleum Machinery

基　　金：国家科技重大专项"复杂结构井优化设计与控制关键技术"(2011ZX05009-005)

摘　　要：涡轮叶片型线影响涡轮液流压降变化和速度变化的平稳程度,从而影响涡轮水力能量转化效率。分析了涡轮叶片的结构参数,据此绘制出五圆弧叶型及三次多项式叶型涡轮的叶片型线,在此基础上,利用Fluent软件对常用的五圆弧叶型和三次多项式叶型的涡轮叶栅流场压力、速度变化进行了模拟分析。分析结果表明,三次多项式叶型涡轮的液流压降变化和速度变化比五圆弧叶型涡轮更平稳,因此前者的水力损失比后者更小,水力效率更高。建议涡轮钻具叶片型线设计时尽量采用三次多项式。The turbine blade profile line influences the pressure drop change of turbine liquid flow and smooth- ness of velocity change, and then affects the conversion efficiency of turbine hydraulic energy. The structural param- eters of turbine blade were analyzed, based on which the five-circarc profile and the blade profile of cubic polyno- mial profile turbine were drawn. On the basis of adopting the Solidworks software to draw the turbine blade profile, the Fluent software was used to simulate and analyze the flow field pressure and velocity change of turbine cascade of commonly used five-cirearc profile and cubic polynomial profile. The analysis shows that the change of flow pres- sure drop and velocity of cubic polynomial profile turbine is smoother than that of five-circarc profile turbine. Therefore, the hydraulic loss of the former is less than that of the latter and the hydraulic efficiency of the former is higher. It is suggested that the cubic polynomial profile of turbodrill should be adopted if possible.

关 键 词：涡轮钻具 叶片 型线设计 三次多项式 五圆弧 FLUENT 数值模拟 

分 类 号：TE921[石油与天然气工程—石油机械设备]