微小型水平轴风力发电机的流固耦合分析

Fluid-Structure Interaction Analysis on Micro Horizontal Axis Wind Turbine

基于ANSYS CFX流体求解器和Workbench结构求解器,采用整体求解一致性网格方法和k-ε湍流模型,分别对单向和双向流固耦合条件下微小型水平轴风力发电机的结构特性进行了对比分析,并重点对机组的双向流固耦合分析进行了研究.首先,通过对微小型水平轴风力发电机进行动力学分析,确认所建立模型的准确性;其次,通过对流场域中旋转域及网格数目之间网格收敛性的相关分析,确认了流场域网格数目收敛性的拟合关系曲线,以及最优的网格数目实例;最后,分别对单向和双向流固耦合进行对比分析,确认了机组双向流固耦合分析结果的可信度.

Based on the ANSYS CFX solver and structural solver in Workbench,the monolithic approach conforming mesh methods and the k-ε turbulence model are adopted in the study. Then one-way and two-way fluid-structure interaction（ FSI） analyses are performed for the micro horizontal axis wind turbine（ HAWT）,and the main point is on the two-way FSI analysis. Firstly,the built model is proved to be available through a comprehensive dynamic analysis on the HAWT. Then,by analyzing the rotational domain and the grid convergence,the relationship between the inner flow field domain（ rotational domain） and the number of grids（ number of cells,elements） is verified,and the optimal case is confirmed and used to conduct the study. Finally,by comparing the results of the one-way and two-way FSI analysis,the two-way FSI analyses shows on HAWT is proved more accurate and credible.