Accession Number:

AD0735318

Title:

Ion and Electron Distributions in the Boundary Layer of Hypersonic Vehicles for Chemical Non-Equilibrium Flow. Part 1. Aerodynamics and Numerical Results

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS ADELPHI MD

Personal Author(s):

• Pollin, Irvin

Report Date:

1971-11-01

Pagination or Media Count:

31.0

Abstract:

Flows over non-ablating hypersonic vehicles are considered when all electrons are produced by aerodynamic heating in the boundary layer. Detailed calculations of the ion and electron distributions are presented for a vehicle with a conical nose and a semivertex angle of 10 deg, for Mach numbers 8 and 10 at sea level. Except for a small region at the nose, the boundary layer is turbulent. Diffusion of electrons with respect to the ions and neutrals is considered and ambipolar diffusion is found to occur across most of the boundary layer only at large ionelectron densities.

Descriptors:

• *HYPERSONIC FLIGHT
• DIFFUSION
• ELECTRON DENSITY
• FLOW FIELDS
• GAS IONIZATION
• PLASMA SHEATHS
• STATISTICAL DISTRIBUTIONS
• TURBULENT BOUNDARY LAYER

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE