Development and Validation of Corridor Flow Submodel for CFAST

Abstract

The modeling of fire and smoke spread is an evolvingfield. As knowledge is acquired and resources become available, models are enhanced to make their predictions more accurate and/or their computations faster. This paper will discuss the Consolidated Fire and Smoke Transport (CFAST) zone fire model, developed by the National Institute of Standards and Technology (NIST), and a recent addition to that model, referred to as the Corridor Flow Submodel. The goal of this new submodel is to more accurately predict the flow of smoke down a corridor which has an impact on fire protection issues such as detection and escape time. Prior to the addition of this new submodel, CFAST assumed that smoke traveled instantly from one side of a compartment to another. Development of the submodel will be discussed and then the enhanced CFAST, Version 4.0.1 (executable dated 3/8/00), will be used to model a real-scale experiment conducted onboard the ex-USS SHADWELL, the Navy's R&D Damage Control platform.

Keywords

fire modeling smoke movement full-scale experiment model validation

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References

Peacock, R.D. , Forney, G.P. , Reneke, P. , Portier, R. and Jones, W.W.

‘‘CFAST, The Consolidated Model of Fire Growth and Smoke Transport,’

National Institute of Standards and Technology, NIST TN 1299, 1993.

McGrattan, K. , Rehm, R. and Baum, H.

‘‘Fire-Driven Flows in Enclosures,’

J. Comp. Phys., Vol. 110, No. 2, 1994, pp. 285–291.

Forney, G.P.

‘‘A Note on ImprovingCorrido r Flow Predictions in a Zone Fire Model,’

National Institute of Standards and Technology, NISTIR 6046, 1997.

Evans, D.D. ‘‘CeilingJet Flows’, in Phillip J. DiNenno et al., editors, SFPE Handbook of Fire Protection Engineering, Chapter 1–9, McGraw-Hill Book Company, New York, first edition, 1989.

Cooper, L.Y.

‘‘Fire-Plume-Generated CeilingJet Characteristics and Convective Heat Transfer to Ceilingand Wall Surfaces in a Two-Layer Zone-Type Fire Environment: Uniform Temperature and Walls,’

National Institute of Standards and Technology, NISTIR 4705, 1991.

Cummings, W.M. , Scheffey, J.L. , Williams, F.W. and Tatem, P.A. ‘‘Test Plan, Submarine Ventilation Doctrine – Phase 1 (Fire Physics and Preliminary Ventilation System Testing), Revision 1,’ NRL Ltr Rpt 6180/0134, 20 June 1995.

Williams, F.W. , Toomey, T.A. and Carhart, H.W. ‘‘The ex-SHADWELL Full Scale Fire Research and Test Ship,’ NRL Memorandum Report 6074, reissued Sept. 1992.

Hoover, J.B. and Tatem, P.A. ‘‘Application of CFAST to Shipboard Fire ModelingI. Development of the Fire Specification,’ NRL Memorandum Report 8466, 26 June 2000.