Analysis of Shock-Wave Loads on a Missile, Launcher and Container During Launches

Abstract

This article presents the results of numerical simulations using software complex ANSYS
FLUENT shock-wave loads on the missile, launch container and silo launcher during the
opening of the container under missile space when the missile leaves the bottom edge of the
launch container. On the basis of test calculations was chosen combination schemes, allowing
obtaining fast enough stable convergent solution. In the article issued recommendations to
build grid model, choosing a method of rebuilding the grid, setting the physical model of gas,
including turbulence models, the choice of sampling scheme in space. To reduce the timeconsuming and computing resources used two-dimensional hexahedral mesh, symmetrical
about the axis of the missile, built tools grid generator ANSYS ICEM CFD. Using this type of
grid, allowed to build it in accordance with the spread of the shock front. The article notes
that various approaches to solving problems with moving boundaries, namely, the use of dynamic and sliding grids. The law of motion is determined by a special custom function Motion
UDF / Profile. This function is written in the language C++ and compiled into a binary file. Calculations of shock-wave on the given research algorithm revealed a number of features
in the launch container loading associated with the propagation of vacuum-compression
waves in channels launcher. An assessment of the influence parameters of combustion products powder pressure accumulator on the distribution and magnitude of shock waves in channels launcher and missiles in the vicinity not only qualitatively but also quantitatively.