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Calculation of the Energy Loss for Tip Leakage Flow in Turbines

机译:涡轮叶尖泄漏流的能量损失计算

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A commercial N-S solver has been employed for simulation and investigation of the unsteady flow field inside the tip clearance of a turbine rotor. The main objective of this paper is to introduce a new method of energy loss calculation for the flow field in tip clearance region of a turbine rotor blade. This method can be easily used in all kinds of flow fields. Regions of high viscous effects have been found to be located near the shroud rather than the blade tip. It is shown that the time-averaged loss of energy in tip leakage flow is dissimilar for different rotor blades. This result is a helpful hint that can be taken by blade designers to design non-uniform rotor blades with different geometric and aerodynamic loads to minimize the energy loss.
机译:商用N-S求解器已被用于模拟和研究涡轮转子尖端间隙内的非恒定流场。本文的主要目的是介绍一种计算涡轮转子叶片顶部间隙区域内流场能量损失的新方法。该方法可轻松用于各种流场。已经发现高粘性效应的区域位于罩附近而不是叶片尖端。结果表明,对于不同的转子叶片,叶尖泄漏流中能量的时间平均损失是不同的。该结果是一个有用的提示,叶片设计者可以借此来设计具有不同几何和空气动力学负载的不均匀转子叶片,以最大程度地减少能量损失。

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