PART I FUNDAMENTAL PRINCIPLES (基本原理)
PART I FUNDAMENTAL PRINCIPLES （基本原理） In part I, we cover some of the basic principles that apply to aerodynamics in general. These are the pillars on which all of aerodynamics is based
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 udwig Prandtl, 1949 Aerodynamics: The dynamics of gases, especially of atmospheric interactions with moving objects The American Heritage Dictionary of English Language, 1969
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
1. 1 Importance of Aerodynamics Historical Examples o Sea battle between English fleet and Spanish fleet, English channel, 8-8-1588 (英国与西班牙海战,英吉利海峡) o First flight of Wright brothers, 12-27-1903 (怀特兄弟首次飞行) o Minimizing of aerodynamic heating of ICBMS (洲际弹道导弹气动热降低问题)
1.1 Importance of Aerodynamics: Historical Examples Sea battle between English fleet and Spanish fleet, English channel,8-8-1588 (英国与西班牙海战，英吉利海峡） First flight of Wright brothers,12-27-1903 (怀特兄弟首次飞行） Minimizing of aerodynamic heating of ICBMs (洲际弹道导弹气动热降低问题）
o Impetus to the study of fluidmechnics (流体力学研究的推动力) 1. Newtons sine-square law 2. Experiments carried out by D'Alembert 3. Euler's description of the flow model
Impetus to the study of fluidmechnics （流体力学研究的推动力） 1. Newton’s sine-square law 2. Experiments carried out by D’Alembert 3. Euler’s description of the flow model
1. Newtons sine-square law a)Newton considered a fluid flow as a uniform rectilinear stream of particles, much like a cloud of pellets from a shotgun blast Rectilinear stream of discrete particles Upon impacting the body, the particles give up the mentum normal travel downstream along the surface
1. Newton’s sine-square law a) Newton considered a fluid flow as a uniform, rectilinear stream of particles, much like a cloud of pellets from a shotgun blast