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What is the significance of burning dummy in thermal protection test?

Release time: 2015-11-02 15:51

In the dangerous environment of the fire field, people need to avoid thermal injuries by wearing thermal protective clothing. Thermal protective clothing is widely used to protect firefighters, steel workers, and workers working in other high temperature and dangerous places. As the clothing is exposed to flames for an extended period of time, the surface temperature of the clothing will gradually increase due to direct burning by the flame, and a large amount of heat transfer causes the air temperature under the clothing and the surface temperature of the human body to rise simultaneously. Under the flame burning of clothing, not only the thermal physical properties of the fabric itself will change and affect its thermal protection performance, but also the surface temperature of the clothing will still remain in a higher range after leaving the flash fire environment, and will be under the clothing. And the temperature of the surface of the human body forms a temperature difference, and the continuous generation of heat transfer causes the surface temperature of the human body to continue to rise. Studies have shown that burns may occur after the flash fire ends, and the energy stored in the fabric is also an important factor for predicting burns. Therefore, even if the thermal protective clothing can resist the short-term burning of the flame, the clothing can still cause burns during the cooling process. So the research on the temperature change of clothing and human body surface after burning is very important.

Research on multilayer protective clothing using a TPP instrument (thermal protection performance tester) shows that the outermost fabric has an important effect on the protective performance of multilayer protective clothing. Experiments with TPP instruments have found that prolonged exposure to heat sources with low heat flux is more prone to burns than short-term severe combustion. In the actual wearing process, the thermal protection performance of clothing not only depends on the performance of the fabric itself, but also needs to be comprehensively considered from the aspects of clothing style design, specifications, and dress attitude. In order to simulate as closely as possible the actual situation of the human body in the actual fire, and to measure the surface temperature of clothing and human body safely and accurately, the test method of the burning dummy has shown advantages.

Infrared camera is used to monitor the temperature change of the clothing surface during the dressing test of the burning dummy system. The sensor of the surface of the burning dummy is used to reflect the temperature change of the skin surface. Impact of change. The combustion dummy tests the above parameters to provide a reference for the design and development of thermal protective clothing.

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