改进格网型中的跨音速分析和设计计算

TRANSONIC ANALYSIS AND DESIGN USING AN IMPROVED GRID

1.引言 近年来采用不同的主控方程计算跨音速绕流的方法有了不断的发展和改进,越来越多的算例表明了计算流体力学的迅速发展,其中解全速势方程的跨音速计算方法也有了很大进展,并已为国外航空工业界广泛地应用于设计和分析计算中。其中有限体积方法提高了处理复杂外形的能力,若采用多重网格技术则可改进计算效率。但是为了发展一种普遍适用和可靠的格网系统以耦合有限体积算法仍有许多工作要做。

CO grid is generated by using an algebraic method. In this grid transonic full potential equation is solved by finite volumn method. The calculated results agree well with experimental data, while the computation time is reduced by a factor of 1/3~1/4 of one required in CH grid. Transonic analysis and design using this improved grid can be made not only for large aspect ratio wings, but also for small aspect ratio wings without any difficulties.