Effect of atomizing air flow on spray atomization of aninternal-mix twin-fluid atomizer
The effect of the atomization air flow rate on the spray characteristics of a swirling twin-fluid atomizer operating on Diesel fuel is investigated. The mean droplet axial velocity and size distributions were simultaneously measured using a phase Doppler anemometer (PDA). The mean droplet diameter i...
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| Main Authors: | , |
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| Format: | Article |
| Published: |
Begell House Inc.
2015
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/58351/ http://dx.doi.org/10.1615/AtomizSpr.2015011361 |
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| Institution: | Universiti Teknologi Malaysia |
| Summary: | The effect of the atomization air flow rate on the spray characteristics of a swirling twin-fluid atomizer operating on Diesel fuel is investigated. The mean droplet axial velocity and size distributions were simultaneously measured using a phase Doppler anemometer (PDA). The mean droplet diameter is found to increase with radial distance from the spray centreline, while its axial velocity decreases from a peak at the centreline. Increasing the atomizing air-liquid fuel mass ratio (ALR) reduces the fuel droplet size due to the increased shear and increases the spray penetration length as a result of increased momentum. Comparison of the drop size-ALR relations to previous independently developed correlations shows good agreement. A comparison was made between the observable boundaries obtained with Mie scattering and the droplet number density. It is found that the Mie images correspond to 95%-99% edge of the cumulative droplet mass distribution through the spray. |
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