ID#: 210
Abstract Title: Interesting Flame Propagation Pattern of Gas Flame Interacting With Dust Deposit
Session Title: Dust and Metal Containing Flames
Session Date: 7/30/01
Session Start Time: 2:00 PM
Contributing Author: Lu, S.
Organization: University of Science and Technology of China
Country: People's Republic of China
Authors: Shou-Xiang Lu, Li Zhang, Zi-Ru Guo
Short Abstract: The acceleration of gas flame propagating over dust deposited on the bottom of a flame acceleration tube is studied experimentally. When premixed gas is ignited in one end of the tube and flame accelerates forward, transient flame of three front structure is induced. After a short time, the three front flame becomes a complex gas-dust flame. The transient three front flame structure consists of a gas flame, a forward dust flame and a backward dust flame. The reason of the backward dust flame occurrence is that a delay or induction time is necessary for deposited dusts lifted and ignited. Because of the existence of the backward dust flame, the curve of flame velocity along the tube tangentially gives a birdlike configuration.