Navier-Stokes Computations for a Reacting, M864 Base Bleed Projectile.
Abstract
The M864 projectile is an extended range design which includes both a dome base cavity and a base burn capability. The extended range is accomplished through the injection of hot, fuel-rich gas which burns in the initially low-pressure base region. The present analysis utilizes a Navier-Stokes computational technique which includes finite rate chemistry to model the reacting base flow region for the M864. Calculations have been performed for the full projectile configuration, including the base region for a Mach number range of 0.8 < M S 3.0. The reacting gas was modeled as a mixture of H2 and CO. Calculations show a significant increase in base pressure with the injection of both H2 and CO due to the more distributed nature of the base combustion and the higher wake region temperatures. Computations were obtained at Mach = 3.0 for conditions of no bleed, nonreacting hot gas injection, and H2 and CO injection. Results are presented in the form of temperature contours and velocity vectors in the near-wake region for this case. Comparisons of the computed drag coefficient, CD0, are made with trajectory model predictions based on actual range firings of the M864.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1995
- Accession Number
- ADA301817
Entities
People
- Charles J. Nietubicz
- Howard J. Gibeling
Organizations
- United States Army Research Laboratory