In this paper, the two approximate hypotheses in boundary layer theory p/y=0,2u/x2=0, are reinvestigated and analyzed, while a new approximate hypothesis, p/y =μ2v/y2, is suggested to establish a new expanded boundar...In this paper, the two approximate hypotheses in boundary layer theory p/y=0,2u/x2=0, are reinvestigated and analyzed, while a new approximate hypothesis, p/y =μ2v/y2, is suggested to establish a new expanded boundary layer equation. Its formula of equilibrium of force coincides basically with that of Navier-Stokes equations on the boundary while the applicable range of the boundary layer expansion equation can be extended to the leading edge region. Theoretical analysis and discussion are presented.展开更多
文摘In this paper, the two approximate hypotheses in boundary layer theory p/y=0,2u/x2=0, are reinvestigated and analyzed, while a new approximate hypothesis, p/y =μ2v/y2, is suggested to establish a new expanded boundary layer equation. Its formula of equilibrium of force coincides basically with that of Navier-Stokes equations on the boundary while the applicable range of the boundary layer expansion equation can be extended to the leading edge region. Theoretical analysis and discussion are presented.
