Abstract
This study entails the analysis of the working performance of solid rocket motors (SRM), featuring the essential element of internal ballistic analysis. Therefore, the internal flow field under the condition of burning surface regression needs to be calculated. The boundary of the internal flow field of the SRM moves with the combustion of the propellant; therefore, it is necessary to accurately track the mobile interface to provide boundary conditions for the flow field calculation. The coupling of the level set method and the volume fraction method is utilized to track the burning surface, and the porous media model is used to divide the fluid and solid calculation domains. The interface between the two calculation domains is used to characterize the burning surface, and then, the area of the burning surface is obtained by solving the area of the interface. The calculation and analysis are carried out for SRM with tubular charge and star charge. The results verify that the calculation model can accurately calculate the transient internal flow field of SRM under the condition of burning surface regression.
Highlights
Solid rocket motors (SRM) are widely used as power plants on missiles and spacecraft because of their superior performance
The results calculated by the zero-dimensional interior ballistic method and the CLSVOF method are compared to verify the accuracy of the CLSVOF method
(3) The pressure under each combustion layer is calculated by the formula pc, i = ðρpc∗a1Si/AtÞ1/ð1−bÞ, where c∗ is the characteristic velocity of charge and At denotes nozzle throat area
Summary
Solid rocket motors (SRM) are widely used as power plants on missiles and spacecraft because of their superior performance. International Journal of Aerospace Engineering algorithm to simulate the movement of the interface This method realizes the coupling calculation with the flow field, but the dynamic interface needs to be explicitly defined in the calculation process. A new interface tracking coupling method was proposed in recent years, which is called the CLSVOF method [15,16,17] This approach overcomes the shortcomings of the VOF method in that it is difficult to accurately calculate the normal and curvature of the interface and solves the problem that LS is not a conservative method, i.e., addresses the loss of physical quantities in the calculation process.
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