Investigation on higher performance of computer controlled multiple fan wind tunnel

通过对每个风机的单独控制，开发了一种主动风洞--多风扇风洞，成功地模拟了风速和风向变化引起的非定常风流。建立了一种研究浸没在这种气流中的棱柱模型表面压力的非定常效应的方法。此外，为了再现龙卷风类风流引起的极端非平稳现象，基于日本气象厅的龙卷风/下击暴流数据库，形成了几种典型的棱柱模型非平稳效应检验模式。

By individually controlling each fan, an active type wind tunnel, a multiple-fan wind tunnel, is developed to successfully simulate non-stationary wind flows due to wind speed and direction changes. A procedure to investigate non-stationary effects on surface pressures on prism cylinder models immersed in such wind flow is established. Further, in order to reproduce the extremely non-stationary phenomenon induced by tornado-like wind flow based on tornado/downburst database of Japan Meteorology Agency is applied to form several typical patterns for the examination of non-stationary effects on prism cylinder models.