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The purpose of this research is to develop the capability to investigate the intermediate ballistics of a cannon mounted with a muzzle brake. The flowfield to the concern of the intermediate ballistic is extremely complex. Many important issues are strongly related to this portion of the ballistic, e.g. the strength of the blast wave, the blast noise, the design of the recoil mechanism. Traditionally, these issues are investigated experimentally through the firing test. However, this kind of experiments are usually difficult, expensive and, sometimes, dangerous. That motivate the current project. Through the using of the computer simulation techniques (the Computational Fluid Dynamics), we could analyze the flowfield within the intermediate ballistic portion in advance of a real cannon is fabricated, a lot of trial and error process can be saved.
Hence, in this thesis, a numerical code with TVD upwind method for solving the Euler or Navier-Stokes equations has been developed to simulate this complex problem. In spatial discretization, the least artificial viscous Roe''s solver with high order kappa MUSCL interpolation is used. In temporal discretization, second order explicit Hancock method is employed for time integration.
Those methods couple with dynamic grid generation successfully simulate. Comparison the numerical results with experiment data, it assures that this code can be used as an effective design tool for this kind of problems. In this study, a computer code is established for the computation of this unsteady flowfield with the moving projectile. The code shall be validated wherever the experiment data are available. With the results of this project, the effects of different muzzle brake designs can be further investigated.
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