计及动叶顶部间隙影响的烟气涡轮数值模拟  

A Numerical Simulation Consideration an Exhaust Gas Turbine Stage Cascade with Tip Clearance

作　　者：王为清[1] 周国义[2] 唐积才[1] 

机构地区：[1]海军工程大学研究生院,武汉430033 [2]海军工程大学船舶与动力学院,武汉430033

出　　处：《热力透平》2009年第3期179-183,共5页Thermal Turbine

摘　　要：本文以某船用增压锅炉涡轮增压机组中的烟气涡轮级为研究对象,采用全三维数值模拟技术和"混合平面"方法传递级间参数,利用标准k-ε双方程湍流模型和耦合隐式求解器,在考虑动叶顶部间隙情况下,通过求解三维定常雷诺平均Navier-Stokes方程来模拟烟气涡轮级叶栅三维湍流流动。文中分析了该型烟气涡轮级动叶顶部间隙流动的表现形式,并给出了叶栅出口参数的变化规律,分析结果对于该型烟气涡轮叶栅的气动优化设计具有一定的参考价值。By way of solving a 3D viscous and compressible Reynolds Navier-Stokes equation at the conditions of considering the tip clearance,a numerical simulation on the 3D turbulent flow was carried out in the exhaust gas turbine Stage Cascade for Supercharged Marine Boiler.The simulation had been accomplished through the adoption of a full 3D numerical simulation technique and ＂mixed plane＂ method for the transfer of interstage parameters and by using a k-εdual-equation turbulent flow model and Coupled Implicit Solver. The formation and development of tip clearance flow and the influences of the turbine performances were investigated, and a law was presented, which governed the variation of some parameters at the outlet of the turbine stage cascade along the blade height direction. The results can provide guidelines for aerodynamic optimization design of the exhaust gas turbine Stage Cascade.

关 键 词：增压锅炉 烟气涡轮 叶顶间隙流 数值模拟 

分 类 号：TK14[动力工程及工程热物理—热能工程]