Experimental Determination of Bore Evacuator Hole Flow Coefficients, Tube to Cannister.
Abstract
The flow-rate of the propellant gases from the gun tube through the bore evacuator holes controls the cannister charging process and determines the maximum pressure available for tube evacuation. In an attempt to model this complex flow in simple mathematical terms the holes are often treated as orifices. Formulations of this type introduce dimensionless orifice coefficients which are intended to embody the collective effect of the details of the actual flow. The determination of these coefficients is the central issue in the modeling. They are expected to vary with changes in the hole configuration, fluid properties and gross measures of the fluid motion. There have been a few attempts to predict these coefficients analytically, and even fewer to determine them experimentally. The results presented here are a modest attempt to extend the empirical database and verify previous mathematical predictions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1993
- Accession Number
- ADP009060
Entities
People
- H. J. Sneck
Organizations
- United States Army Armament Research, Development and Engineering Center