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Records 306 to 310 of 733
| Title: |
Radiative Ignition and Opposed Flow Flame Spread Measurements on Materials |
| Author: |
Margaret Harkleroad, James Quintiere, William Walton |
| Abstract: |
The purpose of this study is to develop a fire-testing method that relates materialignitability and flame spread in the creeping mode. The analytical approach involves parameters and solutions arising from transient heat condition to a semi-infinite solid. Experimental data are generated on an appratus employing a radiant panel to provide a varying heat flux to test specimens. Flame-spread rates and ignition events are measured against incident and exposure time. The flame-spread data for given materials are correlated for varying exposure conditions by plotting the inverse square root of the flame-spread velocity against a product of the heat flux and a time function. The test and analysis results are shown for six diverse materials representative of aircraft (interior panels, carpeting and seat cushions) and building (plywood, polymethyl methacrylate and rigid foam). |
| Report: |
DOT/FAA/CT-83/28 |
Pages: |
92 |
Size: |
9.83 MB |
| Title: |
Computerized Data Acquisition/Reduction for the Ohio State University Rate of Heat Release Calorimeter |
| Author: |
Robert Filipvzak |
| Abstract: |
Technical note DOT/FAA/CT-TN83-01 provides acquisition and plotting software documentation to the Ohio State Rate of Heat Release Calorimeter with chemical analysis system. Hewlett Packard 9825 Computer programs provide for real-time data collection, instrument calibration, data storage, retrieval, and output for release of heat, smoke, carbon monoxide, carbon dioxide, oxygen, hydrogen cyanide, nitrogen oxides, and hydrocarbons. Graphical representation for bith release rates or total output versus time is possible. Computer language is HPL> |
| Report: |
DOT/FA/CT-TN83/01 |
Pages: |
15 |
Size: |
8.31 MB |
| Title: |
Correlation of Laboratory Scale Fire Test Methods for Seat Blocking Layer Materials with Large-Scale Test Results |
| Author: |
Louis J. Brown, Jr., Richard M. Johnson |
| Abstract: |
An interlaboratory study was conducted to determine the adaptability of various laboratory fire test devices to measure aircraft seat cushion b1ocking layer effectiveness. Full-scale tests conducted by the FAA have shown blocking layers to be an effective means of delaying aircraft seat cushion fire involvement when exposed to a large external fuel fire. Large-scale tests conducted in the Douglas Aircraft Company Cabin Fire Simulator (CFS) have also shown similar findings. Such findings are fostering development of new candidate materials. However, it is more practical to evaluate these materials in a suitable laboratory test. device rather than continuously performing expensive full- or large-scale tests. Several such devices were determined to be satisfactory when operated under specific conditions and when certain parameters are measured. The satisfactory devices are the Ohio State University (OSU) Rate of Heat Release Apparatus operated at 5.0 Watts/centimeter squared, the FAA Standard Two Gallon/Hour Burner operated for a two minute exposure, and the Lockheed Aircraft Company Meeker Burner. For a series of blocking layer material candidates, test measurements obtained with the above devices exhibit comparable rankings with weight loss or percent weight loss from larger scale GFS tests. |
| Report: |
DOT/FAA/CT-83/29 |
Pages: |
65 |
Size: |
9.95 MB |
| Title: |
Pressure Modeling of Char-Formiing and Laminated Materials |
| Author: |
R.L. Alpert |
| Abstract: |
The pressure modeling technique is used to study upward fire spread on fuel wall composed of char-forming or laminated mater'ials. Time-resolved measurements are obtained at one-atmosphere (full-scale) and at elevated air pressure (model scales) to characterize fire growth in terms of rate of total mass loss, flame height; upward flame spread rate, and maximum lateral flame dimensions during the spread process. The char-forming materials (pine-wood, particle-board and a rigid, polyurethane foam) are tested in a 90� wall-corner configuration while the laminated materials (PMMA in combination with PMMA or ceramic backings) are tested in a wall configuration. Thermally-thick PMMA is tested in both configurations for purposes of comparison. Results are generally consistent with the pressure modeling scheme and a series of one-dimensional, transient thermal conduction and pyrolysis calculations. The be
Lhavior of the rigid polyurethane foam, however, is an exception. This material does not support self-sustained upward flame spread at one-atmosphere when exposed to flames from a 0.1 m high PMMA ignition source but does support rapid fire growth at elevated pressures. A possible reason for the anomalous polyurethane behavior is the intumescent structure of the hot char at one-atmosphere, but a better understanding of the mechanism of upward or wind-aided flame spread oQ chairing materials is needed to resolve the issue. It is concluded that additional measurements of upward flame spread rates on a variety of simplified, laminated materials will be necessary. It is also concluded that the pressure modeling technique may be valid for predicting fire growth on most charring fuels in corner configurations (with or without a ceiling) as long as a sufficiently large heat flux initiates self-sustained fire spread. |
| Report: |
DOT/FAA/CT-83/24 |
Pages: |
113 |
Size: |
17.4 MB |
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