LAPSE:2021.0690
Published Article
LAPSE:2021.0690
Flow and Diffusion Characteristics of Typical Halon Extinguishing Agent Substitute under Different Release Pressures
Jiaming Jin, Renming Pan, Ruiyu Chen, Xiaokang Xu, Quanwei Li
July 29, 2021
To provide guidance towards reducing the weight of the HFC-125 storage vessel by reducing the release pressure and to reveal the effects of release pressure on the extinguishing efficiency of HFC-125, we investigated the flow and diffusion characteristics of HFC-125 under six release pressures in the present study. The influence of release pressure on the degree of superheat, injection duration, pressure loss, jet angle, and concentration distribution were analyzed. Results show that the degree of superheat and the injection duration both decreased with the release pressure. The bubble expansion in the HFC-125 could slow down the pressure decrease in the storage vessel. The flow process in the pipeline can be divided into three phases: pipeline filling, stable flow, and mixed gases release. Both of the maximum and mean values of the pipeline pressure loss increased with the release pressure. The maximum concentration value decreased with the increase of the distance from the nozzle. The maximum concentration value in the near field from the nozzle increased with the release pressure. The concentration and holding time (duration above 17.6% volume concentration) of HFC-125 in the near field from the nozzle met the requirements of minimum performance standards (MPS) for HFC-125.
Keywords
aircraft weight reduction, diffusion, flow, Halon candidate substitute, HFC-125, release pressure
Subject
Suggested Citation
Jin J, Pan R, Chen R, Xu X, Li Q. Flow and Diffusion Characteristics of Typical Halon Extinguishing Agent Substitute under Different Release Pressures. (2021). LAPSE:2021.0690
Author Affiliations
Jin J: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Pan R: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Chen R: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Xu X: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Li Q: School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China [ORCID]
Journal Name
Processes
Volume
8
Issue
12
Article Number
E1684
Year
2020
Publication Date
2020-12-21
Published Version
ISSN
2227-9717
Version Comments
Original Submission
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PII: pr8121684, Publication Type: Journal Article
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LAPSE:2021.0690
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doi:10.3390/pr8121684
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Jul 29, 2021
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CC BY 4.0
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[v1] (Original Submission)
Jul 29, 2021
 
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Jul 29, 2021
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Original Submitter
Calvin Tsay
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