Abstract: The hydrogen-oxygen combustion single-zone model of a combustion light gas gun is given based on the 19-step detailed chemical reaction mechanism of burning hydrogen-oxygen. The combustion process of hydrogen-oxygen mixed gas in projectile is simulated by this model. The numerical simulation results are in good agreement with the test results in Ref.［1］, and reflect the thermodynamic process of hydrogen-oxygen combustion in a combustion light gas gun. On this basis, the combustion processes of hydrogen-oxygen gases with different conditional parameters are also calculated. The influences of initial temperature, initial pressure, diluents composition and its ratio on the interior ballistic performance of combustion light gas gun and the changes of each chemical composition in hydrogen-oxygen combustion process are analyzed. The results show that initial temperature, initial pressure, diluents composition and its ratio significantly affect the interior ballistic performance of combustion light gas gun.

Key words: ordnance science and technology, combustion light gas gun, hydrogen-oxygen combustion characteristic, single-zone model, detailed chemical kinetics