Studies of Jet A1 Fuel Atomization Through Non Circular Orifices
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Published:2023-05-12
Issue:3
Volume:73
Page:274-282
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ISSN:0976-464X
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Container-title:Defence Science Journal
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language:
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Short-container-title:Def. Sc. J.
Author:
Pooja V. VaniORCID,
Kumar RajivORCID
Abstract
The performance of the liquid rocket engine depends on the atomization behavior of the fluid being injected into the combustion chamber. Generally, a plain injector with a circular orifice has been used in the injector, but it has the disadvantage of having a low spray cone angle. The breakup length, mean droplet diameter, and Sauter mean diameter is also higher. Thus, to overcome these drawbacks, non-circular orifices have been utilized in the present study. The shapes used for non-circular orifices are semi-circular and plus. The results obtained with the non-circular orifice is compared with the circular orifices of the same area ratio. The working fluid used for the studies is Jet A1 fuel. Studies were also conducted with different L/D ratios by choosing an effective orifice length to reduce the upstream losses. The axis-switching phenomena were observed with the semi-circular as well as with the plus jets. The mean droplet size of the circular jets was more prominent compared to non-circular jets, and the Sauter mean diameter of non-circular jets droplets was smaller than that of the circular jet droplet. The spray cone angle has increased by 290% for plus jets and 30% for semi-circular jets compared to circular jets.
Publisher
Defence Scientific Information and Documentation Centre
Subject
Electrical and Electronic Engineering,Computer Science Applications,General Physics and Astronomy,Mechanical Engineering,Biomedical Engineering,General Chemical Engineering