طراحي و ساخت يك محفظه ي احتراق ضرباني (پالس سوز) با شير آيروديناميكي

EXPERIMENTAL INVESTIGATION OF A PULSE COMBUSTOR FOR INDUSTRIAL APPLICATIONS

Pulse combustion increases heat transfer to the surronding media. Some advantages of pulse combustion are increase in efficiency and decrease in fuel consumption and pollutants. After design and construction of an innovative aerovalved pulse combustor, the effects of operating conditions on the system performance were experimentally investigated. The experimental facility consisted of air and fuel inlet, aerodynamic valve, combustion chamber, tail pipe and feed system. Air and propane are used as oxidizer and fuel respectively. Air and fuel flow rates are measured by sonic nozzle and rotameter. Temperature is measured by a thermocouple. Microphone, amplifier, data acquisition board and PC are also used to measure and record the oscillations. Experimental observations indicate that the increasing inlet flow rate and equivalence ratio increase oscillation frequency. Variation in the fail pipe length has strong effect on the oscillation frequency. The results show that the acoustic is not the only mechanism responsible for oscillations. In addition to acoustic, fluid mechanics and energy release, play an important role in determining the frequencies.