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. DOI: 10.3969/j.issn.1673-3185.2018.01.013
引用本文: 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. DOI: 10.3969/j.issn.1673-3185.2018.01.013
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LIU Yao, CAI Weijun, WANG Mingzhou. Numerical simulation for hydrodynamic performance of marine current turbine based on overset grid[J]. Chinese Journal of Ship Research, 2018, 13(1): 85-92. DOI: 10.3969/j.issn.1673-3185.2018.01.013
Citation: LIU Yao, CAI Weijun, WANG Mingzhou. Numerical simulation for hydrodynamic performance of marine current turbine based on overset grid[J]. Chinese Journal of Ship Research, 2018, 13(1): 85-92. DOI: 10.3969/j.issn.1673-3185.2018.01.013
shu

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

    摘要
  • 摘要:
      目的  为了研究海流环境条件下水轮机的非定常水动力性能，
      方法  采用基于重叠网格的动态流体固态相互作用（DFBI）方法，对水轮机在不同来流条件下的非定常水动力性能进行仿真分析。
      结果  研究结果表明：采用基于重叠网格的DFBI方法可以实现在启动过程的起步、加速和稳定3个阶段对水轮机转速、力矩和流场等瞬态参数进行监测；水轮机获能系数Cp在设计流速1.2 m/s附近出现峰值0.24，在流速动态变化条件下，水轮机的平均获能系数约为0.181，与设计流速为1.2 m/s时的获能系数相比下降了约33%。
      结论  采用的基于重叠网格的DFBI数值仿真方法能够对实际海流情况下的水轮机被动旋转水动力特性进行监测，对实际工程设计具有较好的参考价值。

     

    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.

     

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