Investigation of Flow Field Characteristics of Gust Generator

摘要

In this paper, the gust environment generated by the different motion states of the gust generator is numerically simulated and verified by tests in a low-speed wind tunnel. The effects of various motion parameters on the gust amplitude of the gust generator were analyzed for vanes deflection degree of 5°～15°, deflection frequency of 1 Hz~4 Hz, and inlet velocity of 15~25 m/s; and the gust generator flow field under different working conditions was measured using a two-dimensional hot-wire anemometer. The results show that: the gust amplitude at the same monitoring point has a linear relationship with the increase of vanes deflection degree from 5° to 12°; the deflection frequency also has a facilitating effect on the gust amplitude; the inlet velocity has the greatest effect on the increase of the gust amplitude; the wind tunnel wall has a suppressing effect on the gust amplitude. The conclusions of the study have some reference value for the gust response tests in a wind tunnel.