Accession Number : ADA255594


Title :   An Inverse Analysis of Electrothermal-Chemical (ETC) Gun Experimental Data


Descriptive Note : Final rept. May 1990-Jan 1991


Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD


Personal Author(s) : Wren, Gloria P ; Oberle, William F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a255594.pdf


Report Date : Sep 1992


Pagination or Media Count : 82


Abstract : An inverse analysis is presented as one method of assessing ballistic control exhibited in electrothermal-chemical (ETC) experimental gun firings. The analysis attempts to determine the decomposition or gas generation rate necessary to satisfy an energy balance equation as gleaned from available experimental data. The apparent functional relationship between the electrical energy input and working fluid mass consumed is examined. As applied in this report, the inverse analysis of ETC gun firing data is essentially an energy balance between projectile kinetic energy, gas kinetic energy, and gas internal energy. Lagrange assumptions are made for the pressure gradient and gas velocity. Thermochemistry is assumed to be variable depending on the plasma energy to working fluid mass ratio. A sample database consisting of 20-mm and 30-mm gun firings is examined.


Descriptors :   *THERMOCHEMISTRY , *GUNS , *INTERIOR BALLISTICS , PRESSURE GRADIENTS , DATA BASES , INPUT , CONTROL , RATIOS , EXPERIMENTAL DATA , KINETIC ENERGY , BALANCE , GRADIENTS , BALLISTICS , DECOMPOSITION , EQUATIONS , KINETICS , FLUIDS , ELECTRIC POWER , PRESSURE , CHEMICALS , MASS , PROJECTILES , ENERGY , RATES , INTERNAL


Subject Categories : Ammunition and Explosives


Distribution Statement : APPROVED FOR PUBLIC RELEASE