CHEN Cheng\|cheng1,2, CHENG Chen\|guang1, WU Gen\|yong1,2, YING You1,2,3

(1. Zhejiang Windey Co., Ltd., Hangzhou 310012, China；

2. State Key Laboratory of Wind Power System,Hangzhou 310012, China；

3. College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China)

 

Abstract: Aiming at the problem of unsatisfactory air flowed and high temperature of local part inside the wind turbine nacelle, the numerical simulation technique was investigated. After the analysis of heat source and flow characteristics, the simplified 3 dimensional model was established.And then, a method was presented to process the numerical simulation, which based on the computational fluid dynamic and thermodynamics. The cooling performance of different models was evaluated by CFD software.The result indicates that the original model has defective which causes poor cooling performance at high\|temperature zone; the optimization model gives new flow distribution, it causes the increase of air flux and velocity at the core zone, the overall temperature of nacelle decreases as well.

Key words: wind power generation; nacelle thermal design; numerical simulation; air flow; temperature filed