Abstract:

Research of heat transfer mechanism of air gap can not only provide a guideline for more accurate test on thermal protective performance, but also improve the precision of numerical simulation about heat and moisture transfer model.Based on the role of air gap in thermal protective performance test and the research status of heat transfer models of air gap, the features of air gap between clothing and body are analyzed. And heat transfer mechanism of air gap is summarized in terms of heat conduction, convective heat transfer and radiative heat transfer. Modeling heat transfer of air gap is proposed under difference exposure conditions, and predicting future direction in the study on heat transfer model of air gap between protective clothing and skin surface.

Key words: firefighter protective clothing, air gap, heat transfer, numerical simulation