Indian Journal of Science and Technology
Year: 2011, Volume: 4, Issue: 2, Pages: 126-130
Digvijay B. Kulshreshtha1 * , Saurabh Dikshit2 and S. A. Channiwala3
1,2 Mechanical Engg. Dept., C. K. Pithawalla College of Engineering and Technology, Surat–395 007, Gujarat, India
3 Mechanical Engineering Department, S. V. National Institute of Technology, Surat–395 007, Gujarat, India. [email protected]
In pressure-swirl atomizer, a swirling motion is imparted to the fuel, leading it under the action of the centrifugal force to spread out in the form of a hollow cone as soon as it leaves the exit orifice. This kind of atomizer finds its use in gas turbines and liquid propellant rockets. The combustion usually starts at the periphery of spray and the flame front travels towards the center of the spray. The availability of air for combustion therefore decreases as the flame travels towards the center of the spray from pressure swirl atomizer. The newer approach is to develop a swirling air core in the center of the spray. This approach led to the development of air assisted pressure swirl atomizer. This paper presents the experimental investigations of air assisted pressure swirl atomizer for spray cone angle and penetration length at different injection pressure differential ranging from 3 bar to 18 bar in an increment of 3 bar. The results are then compared with conventional pressure swirl atomizer; with same nozzle dimensions, same inlet pressure and temperature, same mass flow rate and same injection pressure differential.
Keywords: Air assisted pressure swirl atomizer, spray cone angle, penetration length, injection pressure.
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