A study on aerodynamic characteristics and visualization of flow field of lift-drag combined starter. (April 2019)

• Record Type: Journal Article
• Authors: Feng, Fang; Li, Yan; Bai, Yuedi; Tong, Guoqiang; Dong, Xiaoyu
• Is Part Of: Advances in mechanical engineering. Volume 11:Number 4(2019)
• Publication Date: 2019-04
• Subjects: Vertical axis wind turbine -- lift-drag combined starter -- aerodynamic characteristics -- flow measurement -- numerical simulation; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/1687814019846233
• Languages: English
• ISSNs: 1687-8132

Abstract

This study refers to the modification of the aerodynamic characteristics of the starter for the lift-type vertical axis wind turbine, the structure of the traditional drag starter was improved, and the lift-drag combined starter model was proposed. Based on the CFD numerical simulation and the particle image velocimetry visualization test, the aerodynamic characteristics of the lift-drag combined starter model and the drag starter model are studied, and the reasons for the regular variation of the flow field are explained. The results show that the lift-drag combined starter has obvious advantages over the traditional drag starter in both static start-up characteristics and dynamic output characteristics. The average static torque coefficient of the lift-drag combined starter is increased by 8% compared to that of the drag starter after one revolution. The increasing percentage of the maximum dynamic moment coefficient of the lift-drag combined starter is 89% compared to the drag starter, and the decreasing percentage of the minimum is only 30%.