Research on the simulation method of external Ballistic flight speed of fuze

To solve the problem of getting different blowing speed of turbine motor after assembling turbine motor blower of fuze, do the analysis of free jet theory, and deduce the axis velocity formula on the basis of predecessor' research results. According to the theory of fluid mechanics, do the free jet simulation experiment of the round nozzle of constant diameter in the air, and get the data of the axis velocity. Compare the chart between the simulation results and the theoretical formula, in the condition of a lot of difference, according to the presumption of form from the theory of jet velocity, with simulation data as sample, using MATLAB as the tool, fitting out of the axis velocity distribution formula, provide theory basis for testing the turbo air motor speed regulation the simulation results and the theoretical formula, in accord with degree of poor situation, according to the theory of jet velocity equations are the axis of the presumption of form, with simulation data as sample, using MATLAB as the tool, fitting out of the axis velocity distribution formula, for the adjusting the blowing speed of turbine motor in the test.