Research on the Infrared Cooling Characteristics of Composite Nozzle with Water Mist and Water Curtain

doi:10.3901/JME.2024.08.320

Abstract

Abstract: A technical solution using water mist and water curtain composite spraying is proposed to solve the problem that in the traditional water curtain spraying infrared stealth it is difficult to increase the cooling and stealth effect when the water film reaches a certain thickness through increasing the water volume. The infrared characteristics of the target are reduced and the stealth capability is improved through the dual effect of which the water mist particles are used to absorb and scatter infrared waves and the water film is used to cool down the infrared radiation intensity of the target object at the same time. The two types of nozzles are tested and analyzed to explore the infrared cooling characteristics of the composite nozzle under different power parameters and the gain effect of water mist by adjusting the pressure, flow and power parameters. The test results show that as the pressure increases, the infrared cooling time of the composite spray is reduced by 41.6%, 39.7%, and 56.9% compared with water curtain nozzle. The infrared cooling time of the composite nozzle is 47.1% shorter than that of the water curtain nozzle under the same flow rate. And the infrared cooling time of the composite nozzle is 30.5% shorter than that of water curtain nozzle under the same power. The research results provide a new direction for the design of water-based infrared cooling system.

Key words: composite nozzle, water curtain, water mist, infrared cooling, gain

CLC Number:

TH137

LIU Yinshui, WANG Zhen, ZHU Senlin, SUN Ling, WEI Qiang, ZHOU Xinping, CUI Yan, WU Defa. Research on the Infrared Cooling Characteristics of Composite Nozzle with Water Mist and Water Curtain[J]. Journal of Mechanical Engineering, 2024, 60(8): 320-328.

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