Numerical simulation and control measures for deflagration in ventilation ducts of polyimide foam production line

  • Yiting Li China University of Mining & Technology, Beijing, Beijing 100083, China
  • Liang Jiang China University of Mining & Technology, Beijing, Beijing 100083, China
  • Zhangsheng Yin China University of Mining & Technology, Beijing, Beijing 100083, China
  • Mingchao Yin China University of Mining & Technology, Beijing, Beijing 100083, China
  • Tianyu Guo China University of Mining & Technology, Beijing, Beijing 100083, China
  • Donglin Yang China University of Mining & Technology, Beijing, Beijing 100083, China
  • Xiaohong Gui China University of Mining & Technology, Beijing, Beijing 100083, China
DOI https://doi.org/10.55670/fpll.fer.1.1.2
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Abstract

Polyimide foam exhibits excellent high-temperature resistance, flame retardancy, and sound absorption performance, and is widely used in aerospace, advanced equipment, and other high-tech fields. However, its production process involves inherent deflagration risks from combustible dust and volatile organic gases. Using the ventilation and dust-collection duct of a polyimide foam production line as the research object, this paper establishes a numerical deflagration model in ANSYS Fluent to investigate the propagation behavior of gas-dust mixtures inside the duct. The evolution characteristics of velocity, temperature, pressure, species distribution, and particle motion are systematically analyzed. Quantitative results show that the peak gas temperature in the main reaction zone reaches approximately 1680 K, the maximum local flow velocity is 24.3 m/s, and the minimum gas density drops to 0.20–0.40 kg/m³. The middle horizontal section of the duct is identified as the primary deflagration zone, while elbows and areas with structural discontinuities are high-risk locations with significant pressure concentration and flow turbulence. Based on this, targeted risk control measures are proposed, including duct structure optimization, explosion venting and isolation arrangement, dust concentration management, online monitoring system construction, and ignition source control. This study provides theoretical support for explosion-proof design and safety optimization of ventilation and dust removal systems in polyimide foam production lines.

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Keywords
Polyimide Deflagration Numerical simulation Risk management and control
How to Cite
Li, Y., Jiang, L. ., Yin, Z. ., Yin, M. ., Guo, T. ., Yang, D. ., & Gui, X. . (2026). Numerical simulation and control measures for deflagration in ventilation ducts of polyimide foam production line. Future Engineering Research, 1(1), 10–18. https://doi.org/10.55670/fpll.fer.1.1.2
References
  1. Yang F K, Zhang Y D, Deng Y Y, et al. Research Summary on Properties of Polyimide Foam Materials. China Plastics, 2020, 34(11): 94-101.
  2. Wu H T, Liu T T, Pan L, et al. Research and Application of Polyimide Foam. New Chemical Materials, 2023, 51(10): 231-234+238.
  3. Li J W, Zhang G C, et al. Synthesis and Properties of Polyimide Foams Containing Benzimidazole Units. RSC Advances,2016,6(65):60094-60100.
  4. Zhan M S, Wang K. Polyimide Foam[M]. Beijing: National Defense Industry Press, 2010. ISBN: 978-7118067231
  5. Sun G H, Zhang X, Wu D Z, et al. Research Progress of High-performance Polyimide Composites. China Plastics, 2021, 35(09): 147-155.
  6. Zhang Y D, Yu H, Xu X Y. Research Progress of Inorganic Material Modified Polyimide Composites. Synthetic Resin and Plastics, 2021, 38(3): 71-76.
  7. Li R H, Bao Y, Zhao H H. Research progress of polyimide composite thermal insulation materials. Materials Reports, 2025, 39(10): 231-240.
  8. Ma J J, Xiong C X, Jiu Y B, et al. Structure and Properties of Ultra-light Polyimide Foam Prepared by Powder Microwave Foaming Method. Polymer Materials Science & Engineering, 2019, 35(06): 66-72+78.
  9. Su B, Dong H W, Luo Z M, et al. Research Progress on Dynamic Characteristics and Mechanism of Gas-dust Two-phase Explosion. CIESC Journal, 2024, 75(06): 2109-2122.
  10. Jia J L, Sun Y L, Zhou H F, et al. Preparation and Properties of Polyimide Foam by Powder Method. New Chemical Materials, 2025, 53(03): 88-91.
  11. Wang N, Li C F, Liu M L. Research Progress and Application of Modified Melamine Formaldehyde Resin. Thermosetting Resin, 2020, 35(6): 62-65.
  12. Ya B, Ding Z J, Pei L, et al. Properties and Microstructure of High-strength Composite Foam Modified by Polyimide Particles. Plastics Science and Technology, 2025, 53(09): 1-7.
  13. Xu Y, Wang Y D, Xu H, et al. Design of High-resilience Silicone-modified Polyimide Foam Materials. Aerospace Materials & Technology, 2024, 54(06): 59-64.
  14. Safonov A. N.,Kornienko P. V.,and Shirshin K. V..Preparation of a Structural Polyimide Foam Plastic Based on a Bulk Copolymer of Acrylonitrile and Methacrylic Acid. Russian Journal of Applied Chemistry,2024,96(4):468-473.
  15. He Q L. Brief Analysis on the Role of Numerical Simulation Software Fluent in Coal Mine Gas Explosion. Green Science and Technology, 2014(03): 127-128.
  16. Fang Y, Mei J, Zhang H, et al. Numerical simulation study of the effect of coal dust on gas explosion overpressure. Scientific Reports, 2025, 15(1): 35254.
  17. Singha A K, Roy A, Singh A K. Numerical Investigation of Mixed Convection Flows with Variable Viscosity and Prandtl Number and Validation Using ANSYS FLUENT. Journal of Applied & Computational Mathematics, 2021, 10(3): 1-6.
  18. Bae Y Y. Computation of Upward Pipe Flows at Supercritical Pressures with Blended Turbulence Model. International Journal of Heat and Mass Transfer,2021,168: 68-73.
  19. Song Y ,Zhang Q ,Wang B , et al. Numerical study on the internal and external flow field of dust explosion venting. International Journal of Thermal Sciences,2019,145: 106008.
  20. Li H, Wang T, Lu K. Hidden Danger Analysis and Risk Control of Enterprises Involved with Dust Explosion. Industrial Safety and Environmental Protection, 2020, 46(02): 41-43.