计算超音速非定常气动力的一种新方法及其应用

本文提出了一种计算超音速非定常气动力的新方法,它将超音速非定常的活塞理论和定常的锥形流理论结合起来,使得被活塞理论所忽略的翼面上各点间的相互影响用锥形流理论来近似计入。文中运用该方法对十个不同平面形状的机翼进行了二十九种状态的颤振计算,并和风洞颤振实验结果作了比较。比较的结果是令人满意的。特别是和用活塞理论所做的颤振分析相比,计算精度有了明显提高。这表明本方法用于超音速颤振分析是确实可行的,它具有方法简洁,计算精度高,计算时间少,程序编制容易的优点。

A NEW METHOD FOR CALCULATING SUPERSONIC UNSTEADY AERODYNAMIC FORCES AND ITS APPLICATION

A new method is proposed for calculating supersonic unsteady aerodynamic forces in this paper.It combines the piston theory for unsteady flow with the conical flow theory for steady flow.Its essential feature lies in that the interaction of points on a wing neglected in the piston theory is approximated by conical flow theory.This method was applied to flutter calculations of 29 cases for wings with 10 different types of plan forms.The results have been compared with flutter test data obtained in wind tunnels in satisfactory agreement.The accuracy of flutter analysis improved by this method is much higher than that obtained by the piston theory.It is shown that this method is feasible and reliable for supersonic flutter analysis.It provides the advantages of briefer algorithms,higher numerical accuracy,less computing time and easier programming.