Dynamic Response of Rocket Swirl Injectors, Part II: Nonlinear Dynamic Response

Abstract

of a classic swirl (simplex) injector. The abrupt convergence resonance model (ACRM) describes the magnitude of injector mass flow response assuming a radial step contraction, while the conical convergence resonance model (CCRM) treats the contraction from the vortex chamber to the nozzle using an arbitrary number of small radial steps. In this second part of the study, numerical calculations are performed to assess nonlinear dynamic response and to compare results with ACRM and CCRM predictions. The vehicle for these computations is a boundary element method (BEM) that preserves surface shapes with high accuracy.