Case Study on Oxidizer-Only Flow Through a Modified Bi-Swirl Injector

Abstract

An experimental simulation study was conducted to analyze oxidizer-only injection through a modified bi-swirl injector. This report aims to present the simulation process and findings in an accessible manner, while retaining the necessary technical detail. The oxidizer used for this study is liquid oxygen (LOX), and the simulation explores various flow conditions by varying inlet mass flow rates and outlet velocities. The objective is to evaluate the flow characteristics and potential backflow behavior, which are critical for optimizing the injector design and ensuring effective oxidizer delivery. The case study utilizes ANSYS Discovery for detailed computational fluid dynamics (CFD) simulations. Results include velocity profiles, pressure distributions, and flow gradients, all derived through a systematic ANSYS problem formulation workflow. These insights support the evaluation and potential modification of the bi-swirl injector to enhance its performance under single-propellant (oxidizer-only) injection conditions.