抄録
The characteristics of four types of burner flames (micro-, Meker-, ISO air mix-, and Japan Fire Defense Agency air mix- burner flames: The last two burners are of the same construction except for a stabilizer plate. The former is with the stabilizer plate and the latter is without it, which are currently used for flammability tests of textile fabrics, have been investigated. The dependences of heights of the flames on fuel flow rate, temperature distributions of tipical flames, and distributions of heat fluxes from the flames under test conditions to a solid (aspestos-cement-perlite) plate surface were examined in detail.
It was shown that the flame height of each of micro- and Meker- burner flames is proportional to the fuel flow rate, but that the fuel flow rate to a micro-burner at the standard flame height is about a half as much as that to a Meker-burner. The flame height of either type of the air mix-burners depends on the fuel flow rate and is almost independent of the nozzle hole diameter. The maximum temperatures of micro-, Meker-, and air mix- burner flames are respectivily 1555 °C, 1542 °C, and 1627 °C. These temperatures reduce by several tens °C when a solid plate surface is close to the flames. The measured heat flux distributions along the solid plate surface indicate that the heat flux to a test material depends on the burner type. These results imply the needs of further studies for establishment of an appropriate method for flammability tests of textile fabrics.
