Parametric study on the performance of mist jet engine

To predict the performance of mist jet engine, the gas-droplet nozzle flows were calculated with two-fluid model. The thrust and propulsion efficiency were obtained using the calculation results and boundary conditions. The influence of initial pressure p_i, gas mass flow rate m_Ġ, water mass flow rate m_L̇, half nozzle converging angle θ, droplet diameter D and ship velocity u_s to the thrust and efficiency were investigated. Results indicate that the thrust increases with increasing initial pressure and gas mass flow rate, but the efficiency decreases. The thrust and efficiency increase with increasing water mass flow rate, decreasing droplet diameter and half nozzle converging angle. With increasing ship velocity, the thrust decreases, but the efficiency increases. The results are useful for further investigation on the mist jet propulsion system.