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A Numerical Study on the Extinguishing Performances of High-Pressure Water Mist on Power-Transformer Fires for Different Flow Rates and Particle Velocities

Yongheng Ku1, Jinguang Zhang2,3, Zhenyu Wang3,4, Youxin Li3,5, Haowei Yao3,5,*

1 State Grid Henan Electric Power Company, Zhengzhou, 450018, China
2 State Grid Henan Electric Power Company Maintenance Company, Zhengzhou, 450000, China
3 Zhengzhou Key Laboratory of Electric Power Fire Safety, Zhengzhou, 450001, China
4 State Grid Henan Electric Power Research Institute, Zhengzhou, 450052, China
5 School of Building Environment Engineering, Zhengzhou University of Light Industry, Zhengzhou, 450001, China

* Corresponding Author: Haowei Yao. Email: email

Fluid Dynamics & Materials Processing 2021, 17(6), 1077-1090. https://doi.org/10.32604/fdmp.2021.015779

Abstract

In order to study the extinguishing performance of high-pressure-water-mist-based systems on the fires originating from power transformers the PyroSim software is used. Different particle velocities and flow rates are considered. The evolution laws of temperature around transformer, flue gas concentration and upper layer temperature of flue gas are analyzed under different boundary conditions. It is shown that the higher the particle velocity is, the lower the smoke concentration is, the better the cooling effect on the upper layer temperature of flue gas layer is, the larger the flow rate is and the better the cooling effect is.

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Ku, Y., Zhang, J., Wang, Z., Li, Y., Yao, H. (2021). A Numerical Study on the Extinguishing Performances of High-Pressure Water Mist on Power-Transformer Fires for Different Flow Rates and Particle Velocities. FDMP-Fluid Dynamics & Materials Processing, 17(6), 1077–1090.



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