摘要
本文建立了适用于纯物质流体轴流式S_2流面正命题的变分原理族及其对偶变分原理族。证明了其中的两条狭义变分原理在均转子焓均熵条件下在亚声速区内分别为极大值原理和极小值原理。在变分原理的构造中,采用吉布斯关系作为约束,从而使这些变分原理适用于纯物质流体。
A family of variational principles( VPs) and its dual family of VPs for direct problem on S2-streamsheet are established in this paper. A minimum principle and a maximum principles have been proved respectively for subsonic homorothalpic and homoentropic flow. In establishing these Vps, Gibbs relation is employed as a restraint equation so that these VPs are suitable for pure substance flow.
出处
《空气动力学学报》
CSCD
北大核心
1991年第2期280-284,共5页
Acta Aerodynamica Sinica
关键词
变分原理
对偶变分原理
正命题
variational principles, dual variational principles, direct problem pure substance.
