弹道学报2016，Vol.28Issue(2)：42-46,5.
基于非定常 CFD 的俯仰动导数计算方法
Calculation Method of Pitching Dynamic Derivatives Based on Unsteady CFD Technology
摘要
Abstract
Based on solving N-S equations , the numerical prediction method of pitching dynamic derivatives was studied .The effects of transient time-step, inner iterations , forced sinusoidal motion amplitude and reduced frequency on the calculation result of pitching dynamic derivatives were analyzed . Prediction of dynamic derivatives was conducted for the standard model of dynamic derivatives .The result shows that the transient time-step and reduced frequency are the most important factor affecting dynamic derivatives prediction .The general principle of choosing transient time-step and reduced frequency was presented .The calculation method of pitching dynamic derivatives based on unsteady CFD has high accuracy ,and the result accords with the experiment data .The method has practical value .关键词
俯仰动导数/时间步长/内迭代次数/强迫运动振幅/减缩频率Key words
pitching dynamic derivative/time step/inner iteration/forced sinusoidal motion amplitude/reduced frequency分类
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伍彬,陆韵,周志超,傅建明..基于非定常 CFD 的俯仰动导数计算方法[J].弹道学报,2016,28(2):42-46,5.
