本文采用全位势方程，在超音速区采用虚拟气体假设，给出了跨音速无激波翼型设计的一种方法。
In this paper, a method for the transonic shock-free airfoil design, based on the full potential equation, using "fictitious gas" assumption, is presented.
根据下三角系统的结构特点，将系统每个微分方程中的高阶状态用作虚拟控制进行设计，通过循环设计最终得到系统控制所需要的控制策略。
Owing to the character of structure of lower-triangular system, the high-rank state of each differential equation is used as virtual control, then the control law is constructed by recursive design.
构建了适合EEDM方程应用的虚拟热力系统，确定了各类辅助汽水成分在EEDM方程中的通用表达规则。
Therefore, the paper constructs the virtual thermal system, which is adapted to EEDM equation, and proposes the universal expression rules of each auxiliary steam-water component.
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