Experimental Study on Spray Characteristics of ADN/Water Based Gel Propellant with Impinging Jet Injectors

Abstract ADN/water‐based gel propellant is a new high‐energy, green, non‐toxic propellant, so it has good application prospects in the future aerospace industry. In order to study the spray characteristics of ADN/water‐based gel propellant, two‐strand impinging nozzles were used to carry out experiments. The spray images were observed by high‐speed photography, and the effects of different injection pressure, nozzle diameter, and impact angle on spray configuration, spray cone angle and breakup length of liquid film were studied. The results show that the breakup length of liquid film decreased with the increase in injection pressure and impact angle, and increased with the increase in nozzle diameter. The spray cone angle increased with the increase in injection pressure, nozzle diameter, and impact angle. And the effects of spray pressure and nozzle diameter on spray process were obvious. The distribution of propellant spray in space was clarified under these conditions and it would provide reference data for the structural design of the combustion chamber of the engine.