SHOCK CURVATURE AND GRADIENTS AT THE TIP OF POINTED AXISYMMETRIC BODIES IN NONEQUILIBRIUM FLOW
Abstract
The shock curvature and flow variable gradients at the tip of a pointed body caused by nonequilibrium effects are considered. Coordinates introduced by Chester are used since they offer a convenient way of treating the boundary conditions. The desired functions are obtained by solving numerically a system of linear ordinary differential equations. These equations have a singularity; the nature of the singularity is found analytically, and its numerical treatment is discussed. The specific nonequilibrium effect considered is vibrational relaxation in a pure diatomic gas. Representative results are given for flow of N2 over a cone for a comprehensive range of Mach numbers and cone angles. There is a point analagous to the Crocco point. These results compare favorably with those obtained by South and Newman using an approximate method. Another check is made by comparison with characteristic calculations extrapolated to the origin.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1966
- Accession Number
- AD0812070
Entities
People
- Nathan Gerber
- Raymond Sedney
Organizations
- Ballistic Research Laboratory