Experimental Study on Atomization Characteristics of Liquid Injection in Simulated Space Environment
To investigate the atomization characteristics of liquid injection in space,a simulated vacuum system was built, and the influence of saturated vapor pressure, nozzle diameter, Rcynold number and dissolved gas on flash evaporation was studied. The experimental results show that the intensity of flashing which is the dominant breakup mechanism in vacuum, is determined by saturated vapor pressure. Nozzle diameter has an important effect on the atomization. The influence of diameter on liquid injection in vacuum can be divided into several aspects: the state of flow, the turbulence intensity and the period of bubble growth. Reynold number of the jet affects atomization under space environment from three aspects : outlet velocity, flow state and flash evaporation. Dissolved gas considerably influenced the spray characteristic of liquid jet in vacuum via the unsta- ble growth and micro-explosion of bubbles.
Space environmentFlash evaporation ~Atomization characteristicExperimental study
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维普
