Experiment And Numerical Computation On Combustion And Propulsion Of Bulk-Loaded Liquid Propellent

Based on the engineering background of bulk-loaded liquid propellant gun,experimental and theoretical studies on combustion and propulsion ofbulk-loaded energetic liquid have been conducted. The object is to explorecontrolling methods on the combustion process of bulk-loaded liquidpropellant. The main points are stated as following.Firstly, the small caliber combustion and propulsion device ofbulk-loaded liquid propellant is designed, also with 5 stepped-wall andcolumn chamber of different dimensions. The propellant used in theseexperiments is OTTO-â…¡. The effect of stepped-wall chamber and porous mediaon instabilities occurs during the combustion process of bulk-loaded liquidpropellant has been discussed. The results show that the combustioninstabilities can be controlled better by using stepped-wall chamber, andthe reproduction of combustion process can be achieved.Secondly, according to the studies of the interior ballistic models ofbulk-loaded liquid propellant gun presented by foreign scientists, a newzero-dimensional interior ballistic model has been developed. This modeldivides the combustion process into several phases, and is based on theexperiment results. The numerical simulation is well matched with theexperimental data. Also it can be used to instruct the design of the interiorballistic of bulk-loaded liquid propellant gun.Thirdly, a two-dimensional, axisymmetric, multiphase flow model has beendeveloped. Numerical simulation has been conducted using FLUENT software.By analyzing the distribution of density, temperature, pressure and velocityin the combustion chamber, the main characteristics of combustion andpropulsion of bulk-loaded liquid propellant can be found.