穿越烟气流的飞机颠簸评估方法对比分析

Comparative Analysis on Turbulence Assessment Methods for Aircraft Passing Through Smoke

为了分析飞机穿越烟气流时颠簸情况评估指标的差异,对目前国际上通用的耗散系数和过载增量进行了研究比较,利用计算流体力学方法,在不同工况下应用两种评估指标评价了飞机穿越烟气流场时的颠簸状况。结果表明:由于两种颠簸评估方法的立足点、数据指标均存在一定差异,对严重颠簸区域进行评估时,建议选用过载增量法;而对于颠簸整体范围进行评估时,选用耗散系数法更为安全。研究结果为评估飞机穿越烟气流时颠簸情况的选用提供了参考。

In order to analyze the differences in the evaluation indexes of turbulence in the smoke flow,the dissipation coefficient and overload increment which are commonly used in the world are studied and compared.The results show that there are some differences in the foothold and data indexes of the two turbulence assessment methods.When evaluating the whole range of turbulence,the dissipation coefficient method is safer.The results provide a reference for the selection of methods to evaluate the turbulence of aircraft passing through smoke.