Application of Thermochemical Modeling to Aircraft Interior Polymeric Materials II - Multilayered Seat Cushions

Details

• Creators:
  Dokko, Won ; Ramohalli, Kumar
• Corporate Creators:
  California Institute of Technology, Pasadena. Jet Propulsion Laboratory
• Corporate Contributors:
  United States. Department of Transportation. Federal Aviation Administration. Technical Center
• Subject/TRT Terms:
  Aircraft Cabins Aircraft Materials Aviation Safety Burning Rate Flammability Tests Polymer Fibers Safety Engineering Thermochemistry
• Publication/ Report Number:
  DOT/FAA/CT-83/16
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center
• Abstract:
  This report summarizes the results from a twelve-month study of applying thermochemical modeling to multilayered polymeric materials, passenger aircraft seat cushions. The use of fire-blocking layer(s) between the foam cushion and the covering fabric has been studied extensively to minimize fire hazards from aircraft seats. The objectives of this work are to expand the thermochemical model for the multilayered materials and to experimentally verify theoretical predictions. First, the thermochemical model is extended to any number of multilayered materials, by applying the same analysis technique used in the previous work. The additional constraints of temperature and heat flux continuities at every interface are also applied. A computer program is developed to predict burning behavior of seat cushion systems with and without a fire-blocking layer. Second, a series of tests burning seat cushions with and without a fire-blocking layer are conducted in a modified NBS Smoke Density Chamber. The chamber was supplemented with a multichannel recorder/multiple thermocouples and a weight-measuring device to determine temperature profile and to continuously monitor weight loss, respectively. The results indicate that the predicted temperature profiles are in very good agreement with the experimentally determined ones, and that the same effectiveness of the fire-blocking layers are predicted as those of actual weight loss measurements. It is, however, observed that the formation and presence of a void inside of the. polyurethane foam seem to cause the over-prediction of the temperature profile and under-prediction of the weight loss (compared to the case when-the void is small or nonexistent).
• Format:
  PDF
• Funding:
  181-350-100
• Collection(s):
  University Transportation Centers
• Main Document Checksum:
  urn:sha-512:eac75fc7994e50dae180b86ab424be3cd0cbb88aae4df71c57bd104c3ccf1f4692c3ab1e86492ab35790f297fe6721ec542db3f8944b6a228186de01be095a0a
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92456/dot_92456_DS1.pdf
• File Type:
  [PDF - 1.63 MB ]