机翼和叶栅非定常流的Kutta条件

Kutta Condition in Unsteady Flow Around Airfoils and Cascades

本文在现有的实验研究和数值计算的基础上，对经典Ｋｕｔｔａ条件在非定常流动中的适用性作了进一步的探讨，并对文献［１，２］中提出的一种新的Ｋｕｔｔａ条件──Ｇｉｅｓｉｎｇ－Ｍａｓｋｅｌｌ（Ｇ－Ｍ）模型进行了分析与比较。本文给出了二维振荡机翼和叶栅绕流的变域变分有限元解法中Ｋｕｔｔａ条件的处理方法。本文旨在为机翼和叶栅非定常绕流的数值计算提供更合理可靠的尾缘边界条件。

Based on the existed exprimental and numerical studies of unsteady flow around oscillating airfoiis ahd cascades,the validity of the classical Kutta condition in unsteady flow is discussed.A new unsteady Kutta condition,Giesing-Maskell mode1, is analysed and colnpared with the classical ones, which indicates that the G-M model is essentially equiva- lent to the nonloading condition at the trailing edge of airfoils or blades.The handling of the Unsteady Kutta condition in the variant domain variational FE calculation of 2-D flow around oscillating airfoils is introduced briefly in the present paper.The purpose of this paper is to offer a more reason- able Kutta condition for unsteady flow around airfoils and cascades.