AXISYMMETRIC INTERACTION OF A BLAST WAVE WITH THE SHOCK LAYER OF A HIGH-SPEED BLUNT BODY.
Abstract
A finite-difference method is developed for treating the interactions of a blast wave and the shock layer in the nose region of a high-speed blunt body. The body may be of any blunt shape which can be represented by a connected series of straight-line segments. The investigation is restricted to head-on axisymmetric interactions in the blunted nose region. The numerical procedure is based upon an acoustic modification of the finite-difference method of Godunov, and employs a floating Eulerian mesh which is attached to the bow shock and to the body. The mesh is periodically realigned to follow, in a Lagrangian fashion, the primary contact surface resulting from the blast-wave bow-shock interaction. Comparisons with steady-state solutions show an accuracy of better than 5 percent, and comparisons with some preliminary experimental data suggest an agreement of better than 25 percent for interaction calculations. It is concluded that the numerical code could be extended to more downstream regions of the body, and for greater usefulness should include real-gas effects. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1966
- Accession Number
- AD0803587
Entities
People
- William Mcnamara
Organizations
- Massachusetts Institute of Technology