Digital simulation of aircraft cabin depressurization

Аuthors

Kupchik V. S., Fevralskikh A. V.^*, Adamyan K. I.

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: a.fevralskih@gmail.com

Abstract

Modern digital models are systems of mathematical and computer models describing the structure, functionality and behavior of a product under development or in operation. Digital models can be used at various stages of the aircraft life cycle for determination of layout and operation characteristics. Digital modeling technologies are most widely used at the design, testing and operation stages of aircraft. Digital modeling technologies are used to describe the interconnectedness of the operation of various systems and physical processes accompanying the movement of an aircraft. One of the important tasks of aircraft design is the development of an automatic cabin pressure control system. To solve this problem, this paper presents a digital depressurization model in the form of a system of a geometric fuselage model, a computer model of numerical simulation of air flow in the cabin and outside it, taking into account the operation of the air conditioning system, performed based on the control volume method, and a mathematical model of air flow in the leak area. The numerical aerodynamics simulation module solves the Reynolds-averaged Navier-Stokes equations for the case of viscous compressible flow, closed by the SST turbulence model. The integration of the developed components of the digital model is performed using scripts in the Scheme language. Using the developed digital model, modeling of various failure scenarios and system malfunctions was carried out. The results of testing the methodology are presented using the example of modeling the outflow mode with a descent along the emergency descent profile at an altitude in the cabin of 9.8 thousand feet with a functioning air conditioning system. Based on the modeling results, the dependence of the absolute pressure in the avionics compartment on the time after the failure occurred was constructed, and the outside pressure curve is shown. The possibilities of using the developed digital model in solving of aircraft design problems are presented.

Keywords:

digital simulation, aircraft, depressurization, computational fluid dynamics

References

1. Makhnev M.S., Fevral’skikh A.V. Trudy MAI: elektron. zhurn., 2019, no. 109. DOI 10.34759/trd-2019-109-23.
2. Sakornsin R., Popov S.A. Trudy MAI: elektron. zhurn., 2012, no. 57, 30 p. Avialable at:  https://trudymai.ru/upload/iblock/562/optimizatsiya-aerodinamicheskogo-oblika-kryla-gidrosamoleta-s-....
3. Yaremenko A.V., Nikitchenko Yu.A., Popov S.A. Trudy MAI: elektron. zhurn., 2013, no. 66, 22 p. Avialable at: https://mai.ru/upload/iblock/88a/88ab4079896828f4b9e5571161874446.pdf.
4. Platonov I.M., Bykov L.V. Trudy MAI: elektron. zhurn., 2016, no. 89, 12 p. Avialable at: https://mai.ru/upload/iblock/329/platonov_bykov_rus.pdf.
5. Usachov A.E., Isaev S.A., Sapunov O.A., Sustin S.A. Trudy MAI: elektron. zhurn., 2023, no. 129, 25 p. DOI 10.34759/trd-2023-129-11.
6. Boikov A.A. Trudy MAI: elektron. zhurn., 2021, no. 120, 35 p. DOI 10.34759/trd-2021-120-05.
7. Belyaev B.V., Golikov I.O., Dobrolyubov A.N., Lebedev A.S. Trudy MAI: elektron. zhurn., 2020, no. 114. DOI 10.34759/trd-2020-114-09.
8. Belyaev B.V., Lebedev A.S. Trudy MAI: elektron. zhurn., 2022, no. 125, 19 p. DOI 10.34759/trd-2022-125-08.
9. Pagani A., Carrera E. Gasdynamics of rapid and explosive decompressions of pressurized aircraft including active venting. Advances in Aircraft and Spacecraft Science, 2016, vol. 3, no. 1, pp. 77–93.
10. Matyushev T., Dvornikov M., Maximova I. et al. Theoretical analysis of decompression tolerance based on a simulated depressurisation model of an aircraft’s pressurised cabin. Aerospace Systems, 2024, iss. 7, pp. 575–584.
11. Khudhair A.A., Obaid K.W. An experimental and theoretical study of pierced airplane cabin sudden decompression. AIP Conference Proceedings, 2025, vol. 3169, art. 040092.
12. Zhang T., Lin G., Bu X., Jia C., Du C. Simulation research on rapid decompression of aircraft cabins. IEEE 10th International Conference on Mechanical and Aerospace Engineering (ICMAE), 2019. DOI 10.1109/icmae.2019.8880947.
13. Robinson R.R., Dervay J.P. An evidenced-based approach for estimating decompression sickness risk in aircraft operations : technical report, NASA, Lyndon B. Johnson Space Center Houston, Texas, 1999. 16 p.
14. Bréard C., Lednicer D. A CFD analysis of sudden cocpit decompression. 42nd AIAA Aerospace Sciences Meeting and Exhibit, 5–8 January 2004, Reno, Nevada, 2004, AIAA 2004-2054. DOI 10.2514/6.2004-54. 
15. He Wenbin, Yang Xi, Luo Ding, Lei Jiang, Li Zhimao, Lin Shiquan, Zhang Congxiao. Decompression load analysis in large passenger planes with windshield cracked. Aerospace, 2002, vol. 9, iss. 9, art. 517, 19 p. DOI 10.3390/aerospace9090517.
16. S. Tze Fung Lam, A. Hoi Shou Chan. Human reliability analysis in aviation accidents: a review. Human Error, Reliability, Resilience, and Performance. 2023, vol. 82, pp. 21–32.
17. Fevralskikh, A., Kupchik, V. Numerical Simulation of 3D Surfaces Icing Near the Moving Wall. Proceedings of the International Conference on Aerospace System Science and Engineering (ICASSE 2021), Singapore, Springer, 2021. (Lecture notes in electrical engineering, vol 849). DOI 10.1007/978-981-16-8154-7_22.
18. Fevralskikh A., Makhnev M. Determination and analysis of roll and yaw rotary derivatives of wig vehicle using numerical simulation. Aerospace Systems, 2023, vol. 6. pp. 151–161. DOI 10.1007/s42401-022-00176-4.
19. Strelets D.Yu., Lavrishcheva L.S., Staroverov N.N., Novoselov V.N, Fevral’skikh A.V., Bashkirov I.G. Vestnik mashinostroeniya, 2024, vol. 103, no. 8. pp. 672–678. DOI 10.36652/0042-4633-2024-103-8-672-678.
20. Strelets D., Parkhaev E., Fevralskikh A., Gueraiche D., Das D. Airfoil optimization methodology and CFD validation for mars atmospheric conditions. Aerospace Systems, 2023, vol. 6, pp. 175–186. DOI 10.1007/s42401-022-00181-7.

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