关键词: 氮气发生器, 气幕, 流场

Abstract: The gas accumulation after the leakage of the nitrogen generator may cause the potential safety hazard. It is therefore necessary to set up the gas curtain around the Nitrogen generator to isolate it from the environment of the machinery space. The numerical simulation method is adopted to analyze the influence of the wind speed at the air outlet of the air curtain device on the flow field around the nitrogen generator. The results show that when the wind speed at the secord air outlet of the air curtain is 6.5 m/s, the air curtain at the bottom of the machinery space has poor isolation effect, leaving the gas hold-up region inside the air curtain device. The isolation effect of the air curtain can be increased by adjusting the wind speed at the secord air outlet to 8 m/s. At the same time, the influence of the vortex on the air curtain can be effectively reduced by adjusting the height of the central area inside of the air curtain device.

Key words: nitrogen generator, air curtain, flow field