Boundary element modeling of 2-D and 3-D atomization processes

Liquid jets from two F-1 liquid rocket engine injector designs have been simulated numerically by using boundary element methods. The model is used to study the effects of gas velocity and gas/liquid density ratio upon the liquid column which is subjected to a transverse mode of oscillation. Results indicate that the conditions with higher gas/liquid density ratio of higher gas velocity will promote the instability.; A three dimensional boundary element model for solving the Laplace equation has been developed. The model utilizes linear triangular elements in which the dependent variables, velocity potential and its normal derivative, vary linearly on the triangular elements. The closed forms of integrations have been derived. The validation will be made by comparing the numerical results to the analytical solutions for a sphere with the specified velocity potential on the surface. The final validation will involve the comparison of the results for the temporal instability analysis to an infinite liquid jet which is subjected to a 3-D disturbance.