Численное моделирование течения в полости струйно-струйной жидкостной форсунки

There is a mismatch between the measured and desired specifications of regime parameters after testing two-component fuel injector. In our opinion, this inconsistency is due to the deviation of the geometric characteristics of the nominal values occurring in the injector manufacturing process, on the one hand, and the geometric parameters of flow area and sensor equipment location on the testing setup, on the other hand. In this paper a numerical simulation of the flow in two-component fuel injector is performed using Fluent module of the ANSYS v.13.0.0 software. The flow parameters are determined in the process of solving the three-dimensional hydrodynamic problem. Realizable k-e turbulence model and scalable wall functions in the wall region is used to give reducing computation time. Second order upwind scheme is used for the basic equations discretization. SIMPLE algorithm is used to perform solution of the linear discrete equation system. The dependences of excess full pressure on oxidizer side and fuel side from the injector geometric characteristics (such as roughness, the angle between the streams of oxidant and fuel, the curvature radius of joints and diameter of holes for fuel lines) are given. The results can be used in the development of a new manufacturing process technology and refining rejected injectors.