Start Date
4-1968 8:00 AM
Description
This paper describes two computer programs which have been combined to obtain inviscid perfect and real gas flow fields around axisymmetric blunt nosed vehicles at zero angle of attack, at supersonic or hypersonic flight velocities (Reference 1). A blunt body computer program which calculates the subsonic portion of the flow field, and a method of characteristics computer program which determines the supersonic portion of the flow field, were integrated into a combined efficient single automatic computer program. The blunt body program1 s output automatically supplies the method of characteristics program with the necessary input it requires. The two programs were made mutually compatible and were physically linked together. The linking of the two programs is described.
A drag calculation subroutine is described which was developed to integrate the pressure distribution on the body, in order to determine the total drag and drag coefficient of the body. A geometry subroutine was also developed to extend and improve the body geometry capability so as to include arbitrary aerodynamic body shapes.
A Method of Predicting the Gas Properties Surrounding Aerospace Vehicles in Hypersonic Flight
This paper describes two computer programs which have been combined to obtain inviscid perfect and real gas flow fields around axisymmetric blunt nosed vehicles at zero angle of attack, at supersonic or hypersonic flight velocities (Reference 1). A blunt body computer program which calculates the subsonic portion of the flow field, and a method of characteristics computer program which determines the supersonic portion of the flow field, were integrated into a combined efficient single automatic computer program. The blunt body program1 s output automatically supplies the method of characteristics program with the necessary input it requires. The two programs were made mutually compatible and were physically linked together. The linking of the two programs is described.
A drag calculation subroutine is described which was developed to integrate the pressure distribution on the body, in order to determine the total drag and drag coefficient of the body. A geometry subroutine was also developed to extend and improve the body geometry capability so as to include arbitrary aerodynamic body shapes.
Comments
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