Muzzle Of Numerical Simulation Study

Muzzle brake is an important muzzle device which can decrease the recoil force and recoil length. However, it can also increase the overpressure of blast wave in the direction of the gunners. In this dissertation muzzle brake was studied with numerical simulation of CFD method, the content of the dissertation includes the analyzing of the muzzle brake performance, single objective optimization of muzzle brake and the analyzing of the muzzle brakes performance when their have the same efficiency, the study of the difference between the 2D ax symmetric model with 3D model.The unsteady and inviscid and Euler equations were applied to set up the model of the muzzle that without muzzle device flow field. And then set up the model of the muzzle that with no pill and no initial flow field. The domain of the flow was meshed with unstructured grids and the equations were solved by a finite volume method. The distribution of the overpressure was obtained. The method combining with flow field simulation includes the steady flow simulation and the unsteady flow simulation. The force of muzzle brake was obtained, the follows, we can calculate the efficiency.First, the single objective optimization of muzzle brake which have an influence on the efficiency of muzzle brake. Second, the analyzing of the muzzle brakes performance when their have the same efficiency, the most important objective is the overpressure. Third, to study the aperture whether has the effect of decreasing the overpressure. At last, the study of the difference between the 2D ax symmetric model with 3D model.The conclusions and methods of this paper can be used for the structure design of the muzzle brake, and make a good foundation for the following research.