Hypersonic laminar boundary layer theory
File(s)
Author(s)
Georgeff, M.P.
Type
Thesis
Abstract
Methods of predicting the major characteristics of viscous-inviscid interactions at supersonic and hypersonic speeds are examined, particular emphasis being placed on the integral method of Klineberg. The method of Klineberg is extended to allow the study of viscous interaction phenomena over a continuous range of wall cooling ratio. By suitably normalizing the required profile quantities the dependence on Wall cooling ratio is removed, thus considerably simplifying the method and allowing flows with variable wall cooling ratio to be studied. An extensive theoretical evaluation of the method is made, thus establishing the validity of the integral approach. It is further shown that the properties associated with the stability of the governing differential equations are mathematical properties of the analytic model and should not be associated with any physical characteristics of the boundary layer. Comparisons show that the method of Klineberg provides a good description of the major features of viscous interaction phenomena and is superior to other existing methods. The general agreement with experiment is good for a wide class of body shapes in both supersonic and hypersonic flow.
A parametric study is carried out, thus isolating the significant parameters of viscous-inviscid interactions. A further extension of the method to include three dimensional boundary layers with zero transverse pressure gradient is also developed, and applications to general three dimensional flows arc indicated. Normal pressure gradient effects arc discussed, and methods of allowing for nose bluntness are described.
A parametric study is carried out, thus isolating the significant parameters of viscous-inviscid interactions. A further extension of the method to include three dimensional boundary layers with zero transverse pressure gradient is also developed, and applications to general three dimensional flows arc indicated. Normal pressure gradient effects arc discussed, and methods of allowing for nose bluntness are described.
Version
Open Access
Date Issued
1972
Date Acceptance
1972
Copyright Statement
Attribution-Non Commercial-No Derivatives 4.0 International Licence (CC BY-NC-ND)