Detached eddy simulations of side-loads in an overexpanded nozzle flow

11th International Conference on "Mesh methods for boundary-value problems and applications"

Luchikhina, E.A.^1 ; Tonkov, L.E.^1

Institute of Mechanics Ural Branch of the Russian Academy of Sciences, ul. T. Baramzinoy 34, Izhevsk

426067, Russia^1

关键词: Accurate prediction;    Delayed-detached eddy simulation;    Detached eddy simulations;    Finite volume approximation;    Flow properties;    Pressure-based;    Separated flows;    Wall pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/158/1/012064/pdf
DOI  :  10.1088/1757-899X/158/1/012064

来源: IOP

【 摘 要 】

In this paper, we numerically examine the separated flow in an overexpanded nozzle developed during the starting phase of a rocket engine featuring the side-load effect. We use detached eddy simulation and compare our results with the existing experimental data. The calculations are based on finite volume approximation of the Navier-Stokes equations for perfect gas and pressure-based formulation with PISO coupling. The main flow properties (wall pressure levels, shock waves pattern, side load locus) are rather well reproduced. We suggest using a delayed detached eddy simulation for more accurate predictions of the flow separation.