Abstract:

The premixed flame fueled with propane was simulated by computational fluid dynamics. The effects of slit size, initial wall temperature and initial flame velocity on the quenching length are studied when premixed flame propagates in an equilateral triangular slit, and fitting calculation formula of quenching length is gotten. The results show that the size of the slit, the initial temperature of the wall and the initial velocity of the flame are positively correlated with the quenching length. With the increase of flame initial velocity, quenching length increases slowly. At higher initial flame velocity, the size of the slit is the main factor affecting the quenching length. According to simulate data, a more accurate formula for quenching length calculation is fitted.

Key words:

crimped ribbon flame arrester, flame quenching, premixed flame, numerical simulation, narrow channel