Experimental Study of Acoustic Phenomenon in a Closed Combustion Chamber

This study is aimed at obtaining data from pressure waves generated by the flame front and studying their effects on the formation of tulip flame. A closed rectangular chamber made of acrylic sheets is used for the experiment with premixed propane-air mixture for the combustion process. Equivalence ratio of 0.9, 1.0, and 1.1 are tested for the combustion. Microphones are used to measure pressure signals. In order to see the variation of the pressure wave characteristics at different instances of the combustion process, the microphone is placed at different locations. Data acquisition from the microphone is done through an oscilloscope. The signals are then analyzed to see different aspects of the recorded pressure signals.