中国舰船研究2018，Vol.13Issue(1)：85-92,8.DOI:10.3969/j.issn.1673-3185.2018.01.013
基于重叠网格方法的水轮机非定常水动力数值仿真
Numerical simulation for hydrodynamic performance of marine current turbine based on overset grid
刘垚 1蔡卫军 1王明洲1
作者信息
- 1. 西安精密机械研究所,陕西西安710077
- 折叠
摘要
Abstract
[Objectives]In order to study the unsteady hydrodynamic performance of turbines under changing current conditions,[Method]this paper uses the Dynamic Fluid Body Interaction(DFBI) method based on an overset grid to simulate the unsteady hydrodynamic performance of turbines under different flow conditions.[Results]The results show that the DFBI method based on an overset grid can realize the monitoring of such transient parameters as speed,torque and flow field in the three stages of starting,acceleration and stabilization of the turbine during start-up. The power coefficient of the turbine has a peak value near the design flow rate of 1.2 m/s. Under dynamic conditions,the average energy efficiency of the turbine is about 0.181,which is about 33% lower than the designed flow rate of 1.2 m/s. [Conclusions]The numerical simulation method used in this paper can monitor the hydrodynamic performance of passively rotating turbines under real current conditions,and changes in the characteristic parameters of the turbine flow field and power output under passive rotation conditions,which can play an important role in guiding actual engineering design.关键词
海流能水轮机/被动旋转/非定常模拟/重叠网格/DFBIKey words
marine current turbine/passively rotating/unsteady simulation/overset grid/Dynamic Fluid Body Interaction(DFBI)分类
交通工程引用本文复制引用
刘垚,蔡卫军,王明洲..基于重叠网格方法的水轮机非定常水动力数值仿真[J].中国舰船研究,2018,13(1):85-92,8.
