An algebraic model of high-altitude aircraft decompression and emergency descent
An emergency descent maneuver initiated by pilots shortly after the onset of the decompression recognition was developed for subsonic, supersonic and hypersonic cruisers. Among other findings, the times when a passenger cabin is exposed to altitudes above 25,000 and 40,000 ft and the maximum cabin a...
| Main Author: | |
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| Format: | Article |
| Language: | English |
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Vilnius Gediminas Technical University
2018-03-01
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| Series: | Aviation |
| Subjects: | |
| Online Access: | http://journals.vgtu.lt/index.php/Aviation/article/view/362 |
| _version_ | 1818874444780666880 |
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| author | Nihad E. Daidzic |
| author_facet | Nihad E. Daidzic |
| author_sort | Nihad E. Daidzic |
| collection | DOAJ |
| description | An emergency descent maneuver initiated by pilots shortly after the onset of the decompression recognition was developed for subsonic, supersonic and hypersonic cruisers. Among other findings, the times when a passenger cabin is exposed to altitudes above 25,000 and 40,000 ft and the maximum cabin altitude reached are estimated. An airplane descent aerodynamic model was incorporated for high-speed and low-speed high-drag emergency descents. Airplane cabin atmosphere is assumed to be isothermal. The environmental atmosphere is simulated using the NLPAM nonlinear atmospheric model valid up to 47 geopotential kilometers. Rapid and slow decompressions at several discrete cruising altitudes ranging from 12 to 40 km and varying pilot reaction times in initiating the emergency descent were simulated. The main motivation for this work was to estimate times and altitudes a cabin reaches during depressurization for various flight conditions. This model can be utilized in optimizing the emergency-descent piloting techniques, calculating oxygen supplies, evaluating aeromedical factors, estimating harmful exposures to low pressures, and for other important high-altitude aircraft operations. |
| first_indexed | 2024-12-19T13:10:42Z |
| format | Article |
| id | doaj.art-d6ee87a3c46c4c3b90a9fc5b84f7beef |
| institution | Directory Open Access Journal |
| issn | 1648-7788 1822-4180 |
| language | English |
| last_indexed | 2024-12-19T13:10:42Z |
| publishDate | 2018-03-01 |
| publisher | Vilnius Gediminas Technical University |
| record_format | Article |
| series | Aviation |
| spelling | doaj.art-d6ee87a3c46c4c3b90a9fc5b84f7beef2022-12-21T20:19:56ZengVilnius Gediminas Technical UniversityAviation1648-77881822-41802018-03-0121310.3846/16487788.2017.1380081362An algebraic model of high-altitude aircraft decompression and emergency descentNihad E. Daidzic0AAR Aerospace Consulting, LLC, P.O. Box 208, Saint Peter, Minnesota 56082–0208, United StatesAn emergency descent maneuver initiated by pilots shortly after the onset of the decompression recognition was developed for subsonic, supersonic and hypersonic cruisers. Among other findings, the times when a passenger cabin is exposed to altitudes above 25,000 and 40,000 ft and the maximum cabin altitude reached are estimated. An airplane descent aerodynamic model was incorporated for high-speed and low-speed high-drag emergency descents. Airplane cabin atmosphere is assumed to be isothermal. The environmental atmosphere is simulated using the NLPAM nonlinear atmospheric model valid up to 47 geopotential kilometers. Rapid and slow decompressions at several discrete cruising altitudes ranging from 12 to 40 km and varying pilot reaction times in initiating the emergency descent were simulated. The main motivation for this work was to estimate times and altitudes a cabin reaches during depressurization for various flight conditions. This model can be utilized in optimizing the emergency-descent piloting techniques, calculating oxygen supplies, evaluating aeromedical factors, estimating harmful exposures to low pressures, and for other important high-altitude aircraft operations.http://journals.vgtu.lt/index.php/Aviation/article/view/362aircraft decompressionemergency descentatmospheric modelslimiting aircraft airspeedsunsteady descentaviation regulatory limits |
| spellingShingle | Nihad E. Daidzic An algebraic model of high-altitude aircraft decompression and emergency descent Aviation aircraft decompression emergency descent atmospheric models limiting aircraft airspeeds unsteady descent aviation regulatory limits |
| title | An algebraic model of high-altitude aircraft decompression and emergency descent |
| title_full | An algebraic model of high-altitude aircraft decompression and emergency descent |
| title_fullStr | An algebraic model of high-altitude aircraft decompression and emergency descent |
| title_full_unstemmed | An algebraic model of high-altitude aircraft decompression and emergency descent |
| title_short | An algebraic model of high-altitude aircraft decompression and emergency descent |
| title_sort | algebraic model of high altitude aircraft decompression and emergency descent |
| topic | aircraft decompression emergency descent atmospheric models limiting aircraft airspeeds unsteady descent aviation regulatory limits |
| url | http://journals.vgtu.lt/index.php/Aviation/article/view/362 |
| work_keys_str_mv | AT nihadedaidzic analgebraicmodelofhighaltitudeaircraftdecompressionandemergencydescent AT nihadedaidzic algebraicmodelofhighaltitudeaircraftdecompressionandemergencydescent |