MULTIPHASE THREE-COMPONENT NOZZLE FLOW (MODEL VALIDATION)

Protection of a spacecraft from the dispersed phase produced in operation of control thrusters is an important problem of space technology. Possible sources of the dispersed phase in thrusters are condensation of working media and film cooling systems. To understand interaction of the dispersed phase with the spacecraft, it is necessary to simulate the development of a droplet flow in the thruster nozzle and plume. The paper is focused on development and validation of an eulerian-lagrangian algorithm for numerical simulation of droplet nozzle flows. The eulerian-lagrangian description of the medium implies utilization of a continuous model for the carrier phase and the probe particle model for the dispersed phase. Two-way coupling between the components is taken into account in the course of iterations, and a special time-space averaging procedure is used to obtain droplet-phase parameter distribution. Special attention at this stage of the study is paid to model validation. Some results of the algorithm validation are presented.

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