Design and performance study of a new foam injection device

Fire Science and Technology ›› 2025, Vol. 44 ›› Issue (3): 369-374.

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Design and performance study of a new foam injection device

Qian Xiaodong¹, Chen Lei^1,2, Che Honglei¹, Han Song¹, Liu Jiayin¹

(1. Beijing City Key Laboratory of Subway Fire and Passenger Distribution Safety, Traffic Safety Research Institute, China Academy of Work Safety Sciences, Beijing 100012, China;2. School of Emergency Management and Safety Engineering, China University of Mining & Technology-Beijing, Beijing100083, China)

Received:2024-04-25 Revised:2024-07-02 Online:2025-03-15 Published:2025-03-15

Abstract

Abstract: The study focuses on developing a novel foam jetting device through adjustments to its convergence angle and inlet/inlet length disparity. This enhancement resulted in an increased effective shooting distance of foam at 46.7 m. Furthermore, the paper presents a simulation model that examines the flow dynamics within the two-phase foam stream and investigates the relationship between geometric features, gas volume fraction at the outlet (indicative of foam generation efficacy), and the range of jetting. The experimental results confirm an accuracy rate of 93.27% in device performance verification, contributing to advancements in foam extinguishing agent foaming efficiency and the development of high-performance foam guns and fire suppression systems.

Key words: foam extinguishing agent, spray device, fire safety, numerical simulation

Qian Xiaodong, Chen Lei, Che Honglei, Han Song, Liu Jiayin. Design and performance study of a new foam injection device[J]. Fire Science and Technology, 2025, 44(3): 369-374.

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Design and performance study of a new foam injection device

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