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Records 336 to 340 of 733
| Title: |
The Pyrolysis Toxic Gas Analysis of Aircraft Interior Materials |
| Author: |
Thomas M. Guastavino, Louise C. Speitel, Robert A. Filipczak |
| Abstract: |
Selected aircraft interior materials previously reported are tested by a new methodology. Gas and ion chromatographs linked to computers are utilized to identify and quantify gases evolved from a speciifc thermal exposure. Results are compared to those reported by other methods and instruments. Time concentration profiles are utilized to "Finergerprint" and identify the material by this test evaluation. |
| Report: |
DOT/FAA/CT-82/13 |
Pages: |
49 |
Size: |
27.0 MB |
| Title: |
Modeling Of Ceiling Fire Spread And Thermal Radiation |
| Author: |
R.L. Alpert, M.K. Mathews, A.T. Modak |
| Abstract: |
The pressure modeling technique is used to study fire spread under five different ceiling materials and analytical and numerical techniques are used to compute thermal radiation to floor level from the resultant layer of hot gases near the ceiling. In the physical modeling part of the study, measurements are obtained at one atmosphere (full-scale) and at elevated air pressure characterizing fire growth in a ceiling channel exposed to a developing PMMA wall fire. Pressure modeling predictions of flame spread rates under a PMMA ceiling and flame lengths under an inert ceiling are found to be in reasonable agreement with full-scale behavior. Although fire spread under aircraft material ceilings occurs only at elevated pressure and not at one atmosphere (due to charring effects and the use of full-scale material thickness in the models), exponential growth factors characterizing fire spread rates, mass loss rates and radiant heat loss in the model tests are used to group the five ceiling materials according to fire growth hazard. In the second phase of the study, an exact, numerical solution technique is formulated for computing the radiant flux from hot gas layers with arbitrary, three-dimensional variations in gas temperature and absorption coefficient. A simplified, analytic approximation involving the use of a suitably averaged gas temperature and absorption coefficient is compared with the exact technique for the calculation of radiant flux to targets below the ceiling gas layer. It is found that the analytic approximation is adequate even when gradients in temperature are much larger than those expected from real aircraft cabin fires. |
| Report: |
DOT/FAA/CT-81/70 |
Pages: |
102 |
Size: |
16.5 MB |
| Title: |
Effect of Thermal Radiation on the Integrity of Pressurized Aircraft Evacuation Slides and Slide Material |
| Author: |
Louis J. Brown, Jr, Eldon B. Nicholas |
| Abstract: |
Seventeen full-scale fire tests were conducted to examine the effect of thermal radiation from a large fuel fire on the integrity of pressurized aircraft evacuation slides. Urethane nylon, aluminized urethane nylon, neoprene nylon, aluminized neoprene nylon and aluminized neoprene Kevlar slides were tested at various distances from a 30 by 30 foot fire pit. Heat flux at the slide, inflation pressure, and air temperature were measured and motion pictures and photographs were taken during these full-scale tests. At an average heat flux level of 1.5 Btu/ft2 second (sec) (15 feet from edge of fire pit) in-service evacuation slides failed in a no seam area in 23 to 32 seconds. With an aluminized coating applied to the air holding surfaces, the time failure increased by more than a factor of two at the same test condition. A laboratory test method, suitable for material qualification, was developed that expose an evacuation slide material to a preselected radiant heat flux and pressure. Tests were conducted on new materials submitted by slide and material manufacturers and material samples taken from the undamaged areas of full-scale test slides. A good correlation was demonstrated between the failure times measured in full-scale and laboratory tests. |
| Report: |
FAA-CT-81-28 |
Pages: |
39 |
Size: |
9.23 MB |
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