Aerodynamic loads calculation and analysis for large scale wind turbine based on combining BEM modified theory with dynamic stall model |
| |
Authors: | JC Dai YP Hu DS Liu X Long |
| |
Affiliation: | 1. College of Mechanical and Electrical Engineering, Central South University, Changsha, People’s Republic of China;2. School of Electromechanical Engineering, Hunan University of Science and Technology, Xiangtan, People’s Republic of China;3. Hara XEMC Windpower Co., Ltd., Xiangtan, People’s Republic of China |
| |
Abstract: | The aerodynamic loads for MW scale horizontal-axis wind turbines are calculated and analyzed in the established coordinate systems which are used to describe the wind turbine. In this paper, the blade element momentum (BEM) theory is employed and some corrections, such as Prandtl and Buhl models, are carried out. Based on the B-L semi-empirical dynamic stall (DS) model, a new modified DS model for NACA63-4xx airfoil is adopted. Then, by combing BEM modified theory with DS model, a set of calculation method of aerodynamic loads for large scale wind turbines is proposed, in which some influence factors such as wind shear, tower, tower and blade vibration are considered. The research results show that the presented dynamic stall model is good enough for engineering purpose; the aerodynamic loads are influenced by many factors such as tower shadow, wind shear, dynamic stall, tower and blade vibration, etc, with different degree; the single blade endures periodical changing loads but the variations of the rotor shaft power caused by the total aerodynamic torque in edgewise direction are very small. The presented study approach of aerodynamic loads calculation and analysis is of the university, and helpful for thorough research of loads reduction on large scale wind turbines. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|