A model-based approach to the evaluation of flame-protective garments.

High-quality protective garments are essential in many occupational assignments, e.g., in the petrochemical industry and for firefighting. The problem addressed in this paper is how to objectively asses the performance of protective garments designed to resist fire. We present a system based on a flame mannequin equipped with an array of temperature sensors that provide information about the temperature on the mannequin's surface during exposure to fire. Particular attention is devoted to reconstructing the heat flux reaching the mannequin's surface on the basis of the available temperature records (the inverse heat-conduction problem). The estimated heat flux is used in a skin-simulation model to predict the level of injury that would occur in human exposed to the same heat. The paper includes a novel computational procedure based on a detailed model of the temperature sensor and a numerical solution of the accompanying heat equation. The effectiveness of the solution is demonstrated with experimental data.

[1]  B. Blackwell,et al.  Inverse Heat Conduction: Ill-Posed Problems , 1985 .

[2]  Henriques Fc,et al.  Studies of thermal injury; the predictability and the significance of thermally induced rate processes leading to irreversible epidermal injury. , 1947 .

[3]  David A. Torvi.  Heat transfer in thin fibrous materials under high heat flux conditions , 1997 .

[4]  Guillermo Aguilar,et al.  Radial and temporal variations in surface heat transfer during cryogen spray cooling , 2005, Physics in medicine and biology.

[5]  David A. Torvi,et al.  Research in Protective Clothing for Firefighters: State of the Art and Future Directions , 1999 .

[6]  Martin Camenzind,et al.  Manikin test for flame engulfment evaluation of protective clothing : Historical review and development of a new ISO standard , 2007 .

[7]  Xiaoshu Lü,et al.  A new analytical method to solve the heat equation for a multi-dimensional composite slab , 2005 .

[8]  D. Torvi,et al.  A finite element model of skin subjected to a flash fire. , 1994, Journal of biomechanical engineering.

[9]  Jun Zou,et al.  Numerical Reconstruction of Heat Fluxes , 2005, SIAM J. Numer. Anal..

[10]  Brian D. Gagnon.  Evaluation of New Test Methods for Fire Fighting Clothing , 2000 .

[11]  Elizabeth M. Crown,et al.  Instrumented Mannequin Evaluation of Thermal Protective Clothing , 1992 .

[12]  Michael T. Heath,et al.  Scientific Computing: An Introductory Survey , 1996 .

[13]  Joshua Kiddy K. Asamoah,et al.  Fractal–fractional age-structure study of omicron SARS-CoV-2 variant transmission dynamics , 2022, Partial Differential Equations in Applied Mathematics.

[14]  William Elkins,et al.  Instrumented Thermal Mannikin , 1973 .

[15]  M. Gasperin,et al.  Evaluation of fire protective garments by using instrumented mannequin and model-based estimation of burn injuries , 2007, 2007 Mediterranean Conference on Control & Automation.