Research on optimization of water spray coverage of built-in infrared stealth water curtain single nozzle

Zhongwei Chen; Yunpeng Fu; Xingji Tang

doi:10.1117/12.2532486

7 October 2019 Research on optimization of water spray coverage of built-in infrared stealth water curtain single nozzle

Zhongwei Chen, Yunpeng Fu, Xingji Tang

Author Affiliations +

Proceedings Volume 11161, Technologies for Optical Countermeasures XVI; 111610N (2019) https://doi.org/10.1117/12.2532486
Event: SPIE Security + Defence, 2019, Strasbourg, France

Abstract

At present, water spray cooling is widely used in the fields of fire prevention and cooling as an economical and convenient method. In recent years, surface ships have been using water curtains for surface cooling and infrared stealth, which is becoming more and more common. The LECHLER nozzle used in the infrared stealth field of ships adopts the built-in type, featuring a mounting surface flush with the shell plate, which is suitable for ship stealth. It has a water pressure of 0.5Mpa and a water volume of 4m³/h, and the water spray covers a diameter of 7m. However, through observing the inside, the author found that there is a total pressure loss existing in many structures in the nozzle, which generally results in a loss of flow energy inside the nozzle, thereby reducing the spray coverage of the nozzle. In this paper, the structural optimization research of the nozzle is carried out, and the dual control conditions of inlet water pressure and water supply are proposed. The pressure loss and the coverage of water spray are analyzed by numerical simulation. The calculation shows that the total pressure loss is reduced from the original 47.5% to 10% with the optimized design. Under the premise of controlling the inlet water pressure and flow, the spray coverage is increased by 86.6%.

Citation Download Citation

Zhongwei Chen, Yunpeng Fu, and Xingji Tang "Research on optimization of water spray coverage of built-in infrared stealth water curtain single nozzle", Proc. SPIE 11161, Technologies for Optical Countermeasures XVI, 111610N (7 October 2019); https://doi.org/10.1117/12.2532486

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