Numerical Simulation Of Two-Phase Flow In A Nozzle

Recently two-phase flow in a nozzle is widely used in many fields, such as industry, aerospace and so on. Many researchers at home and abroad have devoted themselves to the study of it. This paper has simulated two-phase flow in a small expansion ratio nozzle.Euler-Lagrange model is used to solve the two-phase flow. How to generate grid, discrete equations and couple two phases are introduced in detail. Based on the above, the gas equation set is solved by PORK algorithm and the particle equation set is solved by Time Marching method. Two-way couple is employed to realize the couple between two phases. The results show the flow feature of two phases near the axis behind the nozzle throat when particles with different sizes and different loading ratio move in a small expansion ratio nozzle. The possibility of dispersed shock wave, its influencing factors, its scale region and its influence to the gas flow behind the nozzle throat are analyzed. To prove the rationality of numerical methods and the accuracy of the solutions adopted in this paper, the classical examples in well-known literature are calculated. By comparison to their results, it shows good consistency. This paper lays a solid foundation to calculate the scale region and influencing zone of dispersed shock wave in different nozzles in the future.