Influence of the gas-distributing grid structural features on the flow parameters in the liquid-propellent rocket engine with producer gas afterburning

The analysis of structural features of the gas-distributing grid was carried out by modern facilities of computational gas dynamics to equalize flow parameters upstream of a mixing head in LPRE with producer gas afterburning. For the given simulation conditions we defined the optimal geometrical dimensions of the facets on the gas-distributing grid openings, providing the maximal discharge coefficient and the minimal pressure differential. We also examined the grid design variants with the various distribution of facets of different geometry, which allows the outflow parameters to be varied according to the grid area. It is obtained, that a flat grid with various openings geometry in the sectors makes it possible to provide the best equalization of the pressure and velocity fields upstream of the mixing head and the minimal pressure losses.