Performance Evaluation of Sonic Fire Fighting System

摘要

Water and chemical based methods are the traditional fire extinguishing techniques. There is an urgent need to develop an extinguisher that can overcome the problem of residues and wastage of water. The best solution and alternative to these traditional methods is sound waves. It is the cleanest method in extinguishing flames. The sound waves will displace the original source to a different position, leading to reduction in oxygen and thus extinguishing the fire. The major focus of the project will be to analyze and evaluate the effect of various frequencies of acoustic waves on flames. It will also involve the study of behavior of sound wave propagation in the truncated designed collimator and various environmental conditions. The low frequency sound wave device suggests a model which includes an acoustic wave generator, power amplifier, subwoofer, and collimator. The testing has been done on the sources of class A and Class B fires. The frequency of 63.1 Hz has been identified for extinguishing the fire. The Collimator design has been modified in order to achieve better convergence and faster time of operation. The modification of Collimator has made it possible to extinguish small as well as medium fires. The variation of high and low pressure in sound waves when combined with a high flow air velocity causes disruption at the flame boundary in the air-fuel ratio, and thus leading to flame extinction.