Abstract
In this paper the atomization character of the pressure-swirl injector was measured by using the Phase Doppler Particle Analyzer (PDPA) in the section of 150 mm below the outlet of the orifice. The orifice diameter of the pressure-swirl injector is 0.62 mm. The atomization character includes the spray angle, the water flow rate, the Sauter mean diameter (SMD), the velocity of the particles and their distribution in the radial and the axial directions under the pressure from 1 MPa to 4.5 MPa. After that the atomization character of the pressure-swirl injector was simulated in the DPM panel. The same atomization character of the injector was calculated and compared with the experimental data. The simulation was corrected by using the experimental data which can make it accurately and the model can be used to predict and calculate the atomization character of different injectors.
Highlights
The nozzle is an important part in the thrust chamber and in the gas generator
In this paper the atomization character of the pressure-swirl injector was measured by using the Phase Doppler Particle Analyzer (PDPA) in the section of 150 mm below the outlet of the orifice
When the system pressure is larger than 3 MPa, the Sauter mean diameter in the simulation is smaller than that in the experiments
Summary
The nozzle is an important part in the thrust chamber and in the gas generator. Its character has a direct influence on the injection and the combustion process. Study on the atomization character and get the droplet size, velocity and their distribution in the axial and radial directions, the atomization character and the combustion character can be predicted. It can help to optimize the design of the nozzle and improve the reliability and the stability of the combustion in rocket. It is significant to study the atomization character of the nozzle. There are three methods to study the atomization. The first one is the theory analysis, the second one is the measurement, and the third one is the simulation
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