Skip to main content
Log in

Evaluation of kinetic parameters appropriate for modeling urethane foam insulation performance

  • Published:
Journal of thermal analysis Aims and scope Submit manuscript

Abstract

Computer codes which model the pyrolysis of thermal insulators for in-depth temperature response are particularly sensitive to the kinetic parameters used in the code. The parameter values, which are evaluated from thermogravimetric analysis (TG), are, in turn, sensitive to the heating and gas flow rates in the TG sample environment as well as the composition of the gas. In this study, the effects of these experimental variables on computer code predictions and their correlations with experimental data are demonstrated. The insulators are urethane foams and were subjected to simulated and actual instantaneous fire test conditions. The Charring Material Ablation computer code was used to model insulator performance.

Zusammenfassung

Computercode zur Modellierung der Pyrolyse von Wärmeisolatoren sind den im Code verwendeten kinetischen Parametern gegenüber besonders empfindlich. Die aus der thermogravimetrischen Analyse (TG) abgeleiteten Parameterwerte sind dagegen empfindlich gegenüber den Aufheiz- und Gasstromgeschwindigkeiten in der Umgebung der TG-Proben sowie gegenüber der Gaszusammensetzung. In vorliegender Arbeit wird der Einfluß dieser experimentellen Variablen auf die Computercodevoraussagen und deren Übereinstimmung mit den Versuchsdaten dargestellt. Die Isolatoren waren Urethanschäume und wurden simulierten und wirklichen Momentfeuertestbedingungen unterzogen.

Резюме

Компьютерные коды, ис пользуемые при моделировании пирол иза термических изоляторов для глуби ны температурного от клика, особенно чувствител ьны к кинетическим параметрам, использу емым в таком коде. Вели чины параметров, определя емые на основе термогравиметричес кого анализа, в свою оч ередь, чувствительны к скор ости нагрева и скорос ти потока газа, а также к с оставу газа. Показано влияние таких экспериментал ьных переменных на компьютерные кодовы е прогнозы и их коррел яции с экспериментальными данными. Изоляционны е пеноуретаны были под вергнуты моделирова нию и определению действи тельной, температуры восплам енения. Для проведени я моделирования этого изолирующего матери ала был использован комп ьютерный код типа Уда ление Обугленного Материа ла.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. T. E. Shaw, D. C. Garner and D. E. Florence, Thermophysics and Temperature Control of Spacecraft and Entry Vehicles—Progress in Astronautics and Aeronautics, Vol. 18, Academic Press, New York, 1966, p. 513.

    Google Scholar 

  2. A. M. Melnick and E. J. Nolan, J. Macromol. Sci., A3 (1969) 641.

    Google Scholar 

  3. I. Auerbach, D. A. Benson S. G. Beard and G. F. Wright, Jr., J. Thermophys. Heat Transfer, 36 (1989) 395.

    Google Scholar 

  4. I. N. Einhorn, M. S. Ramakrishnan and R. W. Mickelson, SPI Int. Cell. Plast. Conf. (Proc.), 4th, 1976, p. 221.

  5. M. S. Ramakrishnam, Diss. Univ. Utah, Salt Lake City, Utah, 1976. Avail: Xerox, Univ. Microfilms, Ann Arbor, MI.

    Google Scholar 

  6. C. B. Moyer and R. A. Rindal, NASA CR-1061, June 1968.

  7. K. E. Suchland, K. C. Kwong and E. F. Fretter, Acurex Report FR-79-21/AS, Acurex Corp., Nov. 1979, Mountain View, CA.

    Google Scholar 

  8. M. L. Hudson, Sandia Report SAND85-1299, Dec. 1985, Albuquerque, NM.

  9. No documentation, but program is available.

Download references

Author information

Authors and Affiliations

Authors

Additional information

Presented as part of Paper 87-1512 at the AIAA 22nd Thermophysics Conference, Honolulu, Hawaii, June 8–10, 1987. This work was performed at Sandia National Laboratories and supported by the Department of Energy under Contract No. DE-AC04-76DP00789.

The author is grateful to C. S. Casaus and J. C. Lanoue for the TG data, B. M. Marder and D. A. Reib for the Kinetic Parameter Evaluation Program and S. G. Beard for assistance with the CMA Program.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Auerbach, I. Evaluation of kinetic parameters appropriate for modeling urethane foam insulation performance. Journal of Thermal Analysis 35, 1629–1641 (1989). https://doi.org/10.1007/BF01912938

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01912938

Keywords

Navigation