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所属单位：航空学院

发表刊物：JOURNAL OF BIONIC ENGINEERING

关键字：semi-activated flapping foil gusty flow power extraction performance

摘要：A numerical investigation on the power extraction performance of a semi-activated flapping foil in gusty flow is conducted by using the commercial software FLUENT. The foil is forced to pitch around the axis at one-third chord and heave in the vertical direction due to the period lift force. Different from previous work with uniform flow, an unsteady flow with cosinusoidal velocity profile is considered in this work. At a Reynolds number of 1100, the influences of the mechanical parameters (spring constant and damping coefficient), the amplitude and frequency of the pitching motion, the amplitude of the gust fluctuation and the phase difference between the pitching motion and the gusty flow on the power extraction performance are systematically investigated. Compared with the case of uniform flow, the capability energy harvesting of the system is enhanced by the introduction of the gusty flow. For a given pitching amplitude and frequency, the power extraction efficiency increases with the gust fluctuation amplitude. Moreover, with an optimal phase difference between pitch and gust (phi = 180), the efficiency can be further enhanced due to the generation of high lift force.

论文类型：期刊论文

学科门类：工学

ISSN号：1672-6529

是否译文：否

发表时间：2017-01-01

合写作者：詹佳普,许冰,吴晶

通讯作者：吴杰