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EXPERIMENTAL STUDIES ON AIR-ASSISTED ATOMIZATION OF JATROPHA PURE PLANT OIL

Avulapati, Madan Mohan and Ravikrishna, RV (2015) EXPERIMENTAL STUDIES ON AIR-ASSISTED ATOMIZATION OF JATROPHA PURE PLANT OIL. In: ATOMIZATION AND SPRAYS, 25 (7). pp. 553-569.

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Official URL: http://dx.doi.org/10.1615/AtomizSpr.2014010413

Abstract

The present study focuses on exploring air-assisted atomization strategies for effective atomization of high-viscosity biofuels, such as pure plant oils (PPOs). The first part of the study concerns application of a novel air-assisted impinging jet atomization for continuous spray applications, and the second part concerns transient spray applications. The particle/droplet imaging analysis (PDIA) technique along with direct imaging methods are used for the purpose of spray characterization. In the first part, effective atomization of Jatropha PPO is demonstrated at gas-to-liquid ratios (GLRs) on the order 0.1. The effect of liquid and gas flow rates on the spray characteristics is evaluated, and results indicate a Sauter mean diameter (SMD) of 50 mu m is achieved with GLRs as low as 0.05. In the second part of the study, a commercially available air-assisted transient atomizer is evaluated using Jatropha PPO. The effect of the pressure difference across the air injector and ambient gas pressure on liquid spray characteristics is studied. The results indicate that it is possible to achieve the same level of atomization of Jatropha as diesel fuel by operating the atomizer at a higher pressure difference. Specifically, a SMD of 44 mu m is obtained for the Jatropha oil using injection pressures of <1 MPa. A further interesting observation associated with this injector is the near constancy of a nondimensional spray penetration rate for the Jatropha oil spray.

Item Type: Journal Article
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Additional Information: Copyright for this article is belongs to the BEGELL HOUSE INC, 50 NORTH ST, DANBURY, CT 06810 USA
Keywords: biofuel atomization; Jatropha pure plant oil; air-assisted atomization; spray characterization; PDIA
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 01 Aug 2015 05:08
Last Modified: 01 Aug 2015 05:08
URI: http://eprints.iisc.ernet.in/id/eprint/52010

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