Simulating a Supercritical Hydrogen-Oxygen Rocket Combustor With CONVERGE скачать в хорошем качестве

Simulating a Supercritical Hydrogen-Oxygen Rocket Combustor With CONVERGE

The BKD research combustor is a sub-scale model of a multi-element rocket engine designed by the German Aerospace Center. Conducting CFD simulations of the BKD combustor allows engineers to study how different factors (e.g., injector design and propellant properties) influence flame stability, combustion efficiency, and flow characteristics. In this simulation, we used CONVERGE’s SAGE detailed chemistry solver and large eddy simulation (LES) turbulence modeling to simulate the BKD combustor with hydrogen fuel and liquid oxygen as the oxidizer. CONVERGE’s temperature-based Adaptive Mesh Refinement automatically adjusts the grid throughout the simulation to efficiently capture the combustion dynamics. The first view in the video (0:06) shows the BKD combustor geometry with a realistic rendering of the flame. At 0:14, we show a horizontal slice at the midplane colored by velocity magnitude. The horizontal slice transitions at 0:21 to show mass fraction of oxygen. In the next view (0:28), the horizontal slice displays temperature, and vertical slices colored by temperature at four axial positions are shown at the top of the screen. At 0:41, the horizontal slice transitions to show pressure, and a graph of the pressure at the center of the chamber varying over the axial distance is shown at the top. Convergent Science's CONVERGE is an innovative computational fluid dynamics (CFD) software that eliminates the grid generation bottleneck from the simulation process through autonomous meshing.