On Study of AFFF Performance Parameter in Altitude Low Pressure Environment

In view of special low pressure environment in high-altitude plateau, the paper carries out simulation and field experiment of AFFF in high-altitude low pressure environment. The results show that: when ambient pressure changes from 101kPa to 24kPa, with the reduction of ambient pressure, the foam expansion of AFFF decreases, and drainage time of AFFF decreases first and increases later; the 59kPa is the extreme point of whole change process and the drainage time of AFFF fire extinguishing agent reaches a minimum under this ambient pressure. During the stage from 101kPa to 59kPa, the drainage time of AFFF decreases with the reduction of ambient pressure. It shows through field test that in the stage from 101 kPa to 59kPa, the performance parameters of AFFF foam are consistent with those in simulation experiment.