Numerical Simulation of the Flow Through the Rotor of a Radial Inflow Turbine
Numerical Simulation of the Flow Through the Rotor of a Radial Inflow Turbine
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DOI：
10.1115/97-gt-090
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发表时间：
1997-06
期刊：
影响因子：
--
通讯作者：
V. Amedick;H. Simon
中科院分区：
文献类型：
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作者：
V. Amedick;H. Simon
采用块结构网格模拟跨音速湍流流动的Navier-Stokes方程求解器对径流式涡轮导向叶片进行了优化设计。该程序已推广到汽轮机旋转部件的流动计算，并用于模拟径流式涡轮机转子的湍流流动，给出了三种计算结果（无叶顶间隙的粘性流和无叶顶间隙的粘性流，以及有叶顶间隙的粘性流）。在设计条件下，在转子入口处存在一个大的冲角的流场进行了研究。忽略非定常影响，无粘和粘性模拟结果的比较表明粘性力的影响很大。在叶片和壁面附近存在较强的二次流流型。特别注意分析了通过机匣和叶片之间的差距的流动。通过差距的质量流率的测定表明，在叶片开始处（叶片长度的6.1%），质量从叶片的吸力侧向压力侧输送。此后，通过差距的质量流改变其方向。
An existing Navier-Stokes solver to simulate the turbulent transonic flow using block-structured grids has been used to optimize the guide vanes of radial inflow turbines. The code has been extended to calculate the flow in the rotating parts of turbomachines and is now used to simulate the turbulent flow through the rotor of a radial inflow turbine.The results of three calculations are presented (inviscid and viscous flow without tip clearance, viscous flow with tip clearance). The flowfield is investigated at design conditions where a large incidence angle exists at the entrance of the rotor. Unsteady effects are neglected.The comparison of the results of the inviscid and viscous simulations shows the strong influence of the viscous forces. Strong secondary flow patterns are found in the vicinity of the blades and the walls. Special attention has been paid to the analysis of the flow through the gap between the casing and the blades. The determination of the mass flow rate through the gap shows that mass is transported from the suction towards the pressure side of the blade at the beginning of the blade (6.1% of the blade length). Thereafter, the mass flow through the gap changes its direction.Copyright © 1997 by ASME