旋翼桨-涡干扰噪声问题是直升机气动声学领域的一个研究热点和难点。
The research on the rotor blade-vortex interaction (BVI) noise is a very important aspect and a very challenging subject in the rotorcraft aeroacoustics field.
基于桨叶二阶升力线理论和旋翼自由尾迹模型,本文在第三章建立了一个适合于直升机旋翼尾迹结构及桨-涡干扰气动特性分析的方法和模型。
In Chapter 3, based upon the blade second-order lifting-line model and rotor free-wake model, an analytical method is developed for predicting the rotor wake structure and BVI airload.
介绍LUGB系列涡街流量计的工作原理,使用过程中干扰现象及排除方法。
The article introduces the principle of LUGB series flowmeter, failure in use and repair method.
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