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Modelling of Accelerating Non-Isothermal Liquid Jet Breakup Mechanisms
Technical Paper
2014-01-2747
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Fuel injector performance has a direct effect on the combustion efficiency, pollutant emissions and combustion instability of internal combustion engines. Liquid fuels are normally accelerated into an elevated combustion-chamber temperature to maintain a desirable homogeneous combustible mixture - liquid vapour and air. The accelerated jet breakup may be induced by cavitation, turbulent, hydrodynamic and aerodynamic forces interactions and variation in fluid properties. The absolute majority of studies have been devoted to the extensive study on some of the effects that cause jet instability and breakup, while others are still at their infant study. In particular, relatively few researchers have studied the combined effects of jet acceleration and non-isothermal condition on jet instability and breakup, despite its practical relevance in liquid fuel spray and combustion. A new analytical hydrodynamic instability and breakup model, which captured both jet acceleration and non-isothermal condition, for liquid jet is presented. The analytical model investigates the impact of two important phenomena on liquid jet instability and breakup; jet acceleration and non-isothermal conditions. These effects are naturally difficult to address by both experimental and CFD investigations. The new model analysis combined both hydrodynamic model and heat transfer equations, coupled through the surface-tension gradient, and is a novel address of this conjugated problem. Continued modelling in that area may benefit the development of the next generation of liquid fuel injectors and combustors, as simplified models have a quantitative agreement with experimental results.
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Citation
Diemuodeke, O. and Sher, I., "Modelling of Accelerating Non-Isothermal Liquid Jet Breakup Mechanisms," SAE Technical Paper 2014-01-2747, 2014, https://doi.org/10.4271/2014-01-2747.Also In
References
- Stiesch G. Modeling Engine Spray and Combustion Processes (Heat and Mass Transfer) Berlin Springer Verlag 3-540-00682-6 2010
- Beaumgarten C. Mixture Formation in Internal Combustion Engines Heidelberg Springer-Verlag 978-3540308355 2006
- Sher I. Effect of Non-Isothermal Conditions on Liquid Breakup Mechanisms ASME:14th International Heat Transfer Conference 743 747 2010 10.1115/IHTC14-23372
- Chhetri A. B. and Watts K. C. Surface tensions of petro-diesel, canola, jatropha and soapnut biodiesel fuels at elevated temperatures and pressures Fuel 104 704 710 Feb. 2013 10.1016/j.fuel.2012.05.006
- Eggers J. and Villermaux E. Physics of liquid jets Reports Prog. Phys 71 3 036601 Mar. 2008 10.1088/0034-4885/71/3/036601
- Sirignano W. A. and Mehring C. Review of Theory of Distortion Disintegration of Liquid Streams Prog. Energy Combust. Sci 26 609 655 2001 10.1016/S0360-1285(00)00014-9
- Turner M. R. , Healey J. , Sazhin S. S. , and Piazzesi R. Wave Packet Analysis and Breakup Length Calculations for an Accelerating Plannar Liquid Jet Fluid Dyn. Res 44 1 015503 2012 10.1088/0169-5983/44/1/015503
- Satkoski C. and Shaver G. Piezoelectric Fuel Injection: Pulse-to-Pulse Coupling and Flow Rate Estimation IEEE/ASME Trans. Mechatronics 16 4 627 642 Aug. 2011 10.1109/TMECH.2010.2048334
- Reitz R. D. and Bracco F. V. Mechanism of Atomization of Liquid Jet Phys. Fluids 25 10 1730 1742 1982 10.1063/1.863650
- Furlani E. P. Temporal instability of viscous liquid microjets with spatially varying surface tension J. Phys. A. Math. Gen 38 1 263 276 Jan. 2005 10.1088/0305-4470/38/1/020
- Diemuodeke , O. and Sher , I. Modelling of Liquid Fuel Spray in Non-Isothermal Environments SAE Technical Paper 2014-01-1433 2014 10.4271/2014-01-1433
- Sher I. Stability and Breakup of Transient Jets ILASS-Europe 6 8 September 2010
- Diemuodeke E. O. and Sher I. Modelling of Unsteady Effects on Jet Breakup ILASS - Europe, 25th European Conference on Liquid Atomization and Spray Systems 1 4 September Chania, Greece 2013
- Naterer G. Heat Transfer in Single amd Multiphase Systems New York CRC Press 0-8493-1032-6 2003
- Oko C. O. C. Introduction to Heat Transfer: An Algorithmic Approach 2nd Port Harcourt University of Port Harcourt Press 2011
- Diemuodeke E. O. and Sher I. Non-Isothermal Effects on Breakup Mechanisms of Liquid Fuel Fuel 2014
- Dumouchel C. On the Experimental Investigation on Primary Atomization of Liquid Streams J. Exp. Fluids 45 371 422 2008 10.1007/s00348-008-0526-0
- Lefebvre A. B. Atomization and Spray New York Hemisphere Publishing Cooperation 0-89116-603-3 1989
- Payri R. , Gimeno J. , Bardi M. , and Plazas A. H. Study liquid length penetration results obtained with a direct acting piezo electric injector Appl. Energy 106 152 162 Jun. 2013 10.1016/j.apenergy.2013.01.027
- ECN Sandia National Laboratory www.sandia.gov/ecn/dieselSprayCombustion.php April 2014
- Sazhin S. S. Advanced models of fuel droplet heating and evaporation Prog. Energy Combust. Sci 32 2 162 214 Jan. 2006 10.1016/j.pecs.2005.11.001
- Siebers , D. Scaling Liquid-Phase Fuel Penetration in Diesel Sprays Based on Mixing-Limited Vaporization SAE Technical Paper 1999-01-0528 1999 10.4271/1999-01-0528
- Karimi K. Characterisation of Multiple-Injection Diesel Sprays at Elevated Pressures and Temperatures University of Brighton 2007
- Karimi K. , Sazhina E. , Abdelghaffar W. , Crua C. , Cowell T. , Heikal M. , and Gold M. Developments in Diesel Spray Characterisation and Modelling THIESEL Conference on Thermo-and Fluid-Dynamic Processes in Diesel Engine 2006
- Ming H. , Shenlun L. , Haifeng L. , and Chia-fon F. Investigation on Spray Characteristics of Water Emulsified Diesel with Different Injection Pressure and Ambient Temperature ICLASS 2 6 September 2012
- Tjahjadi M. , Stone H. a. , and Ottino J. M. Satellite and subsatellite formation in capillary breakup J. Fluid Mech 243 297 317 Apr. 1992 10.1016/j.pecs.2005.11.001