具有前掠叶片的低压涡轮叶栅流动稳定性研究  

Study on the Flow Stability in Suction Surface of LP Turbine Guide Cascade With Swept-forward Blade

作　　者：化广宇[1] 张宏涛[1] 顾忠华[2] 

机构地区：[1]哈尔滨汽轮机厂有限责任公司,哈尔滨150046 [2]哈尔滨工业大学,哈尔滨150001

出　　处：《汽轮机技术》2012年第3期198-200,共3页Turbine Technology

摘　　要：在具有前掠叶片的涡轮低压导向叶栅的风洞实验中,测量了静压系数在不同叶高沿叶型的分布。根据静压分布的测量值,通过求解Falkner-Skan方程,获得不同来流马赫数下叶片边界层内沿流向的速度、压力、密度等参数。然后,将以上结果作为边界层的平均流动值,结合数值离散化的正交曲线坐标系线性抛物化稳定性方程(PSE),对边界层流动的稳定性进行特征值分析。计算结果表明,所选用的实验叶栅由于应用了前掠叶片,加载均匀,边界层流动相对稳定。In the wind tunnel tests of LP turbine guide cascade with swept-forward blade, this paper experimentally measured static pressure coefficient distribution along the blade at different blade height. By solving Falkner-Skan equation with measurements of. static pressure distribution, this paper obtained the parameters under the different incoming flow mach number along the boundary-layer of the blade, such as velocity, pressure, density, and so on. Then, taking the above results as the average values of the boundary-layer flow, and to combine orthogonal curvilinear coordinates linear parabolic stability equation （PSE） of numerical discretization, this paper carried out eigenvalue analysis to the stability of the boundary-layer flow. The results showed that load distributed more uniform and boundary-layer flow became relatively steady due to applying swept-forward blade in this cascade test.

关 键 词：涡轮低压导向叶栅 前掠叶片 风洞实验 PSE方法 边界层稳定性 

分 类 号：TK263.3[动力工程及工程热物理—动力机械及工程]