Effects of swirling flow on characteristics of water ramjet engine

A swirling-style propellant water ramjet model was established on the basis of a particular model of column-style propellant water ramjet. The effect of swirling flow on the flow and reaction characteristics in the water ramjet was simulated by Fluent software. Turbulent flow simulation was performed using the standard k-ε two equation functions, and combustion reaction was calculated by finite-rate/eddy-dissipation model. The functions were solved by implicit coupling calculation method based on the density. Results show that, adding swirling vanes and increasing the swirling angle can improve the maximum temperature, the average temperature, the outlet velocity and the specific impulse, which proves that adding swirling vanes make drastic improvements of flow and combustion reaction in the water ramjet engine, and the greater swirling angle means the better results.