Modeling of Ventilation Characteristics Formed by Jet in Cross Flow

It is important to accurately model and analyze the ventilation characteristics formed by jet in cross flow (JICF) of liquid around a plate. Through 3D numerical simulations (using FLUENT), design of experiment (DOE) and regression, a mathematical model is constructed to accurately describe the process of formation of ventilated cavity by gas jet in cross flow of the liquid phase. Multiphase flow and turbulence models are established to reflect the formation and development of the ventilated cavity, and a reasonable simulation plan is established by means of design of experiment, and a regression model is obtained through nonlinear regression. A reasonable simulation plan is established to model the different factors impact on the size of the ventilation cavity and to comprehensively reflect its effect. Ventilation characteristics formed by JICF are then compared with experimental results. The results of various comparative analyses show that the 3D simulation method presented in this paper can more accurately reflect the ventilated cavity formation and, with this, evaluate the ventilation characteristics and make the design reasonably with the mathematical model obtained through design of experiment nonlinear regression. It is of great significance in many applications, including pump jet propeller design, by optimizing the design to meet the given design conditions with reasonable variations of parameters.