Was sind,, Axiome: eigentlich Behauptungen. Wenn es gelingt, aus einer beschrankten Anzahl solcher Axiome\ einen in sich abgeschlosse- nen Bereich des Denkens zu schaffen( in der Philosophie und in etwas erzwungener Form auch in der Informatik als Onthologie-die Lehre des,,Seins\ bezeichnet). Dann kann man in diesem Bereich im Rahmen der Axiome ,spazieren denken\ Ein Beispiel hierfur ist die analytische

Chapter 1 Aerodynamics: Some Introductory Thoughts The term \aerodynamics\is generally used for problems arising from flight and other topics involving the flow of air. Ludwig Prandtl, 1949 Aerodynamics: The dynamics of gases, especially of atmospheric interactions with moving objects. The American Heritage Dictionary of English Language, 1969

Chapter 2 Aerodynamics: Some Fundamental Principles and Equations There is so great a difference between a fluid and a collection of solid particles that the laws of pressure and of equilibrium of fluids are very different from the laws of the pressure and equilibrium of solids Jean Le Rond d' Alembert, 1768

Chapter 3 Fundamentals of Inviscid, incompressible Flow Theoretical fluid dynamics, being a difficult subject, is for convenience, commonly divided into two branches, one treating frictionless or perfect fluids, the other treating of viscous or imperfect fluids. The frictionles fluid has no existence in nature, but is hypothesized by mathematicians in order to facilitate the investigation of important laws and principles that may be approximately true of viscous or natural fluids

Chapter 4 Incompressible Flow Over Airfoils Of the many problems now engaging attention, the following are considered of immediate importance and will be considered by the committee as rapidly as funds can be secured for the purpose... The evolution of the more efficient

5.1 Introduction The properties of airfoils are the same as the properties of a wing with infinite span. However, all real airplanes have wings of finite span. In the present chapter, we will apply our knowledge of airfoil properties to the analysis for finite wings. As we have mentioned in the previous chapter, the analysis for the aerodynamics of wings is separated in two steps.now, we are going on the second-step in Prandtl's philosophy of wing theory

11. 4 PRANDTL-GLAUERT COMPRESSIBILITY CORRECTION The methods that approximately take into account of the effects of compressibility by correct the Incompressible flow results Is called compressible corrections

This chapter mainly deal with the properties of two-dimensional airfoils at mach number above 0.3 but below 1, where the compressibil ity must be considered

特别要注意:膨胀过程是一个等熵过程。 要解决的问题是:已知上游马赫数M及其它流动特性(区域1), 求通过偏转角θ膨胀后的下游(区域2)的特

如上图所示的斜激波在真实情况下有时会碰到固壁或与其它激 波、膨胀波相交,进而发生相互作用,这种现象称为激波的干 扰与反射。本节的目的就是要定性地讨论激波的干扰问题