The burner was shut off and removed from pan area when the oil was ignited on the surface.
The experimental scenarios are summarized in Table 1. Every scenario was conducted for two times to get the average result. For the cooking oil fires, pre-burning was allowed to reach steady burning conditions. Then water mist was applied and the fire extinguishment time was recorded.
The fire suppression process was observed and recorded by a data acquisition system with 1 second sampling interval. One video camera was used to provide visual records of the cooking oil fire, water mist discharge, oil splashing, and fire suppression. The experimental environment temperature was 25 °C.