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ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684
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BUBBLE DYNAMICS MODEL FOR PREDICTING THE GROWTH AND COLLAPSE OF CAVITATION BUBBLES IN DIESEL INJECTOR
Краткое описание
This paper investigates the applicability of the existing bubble dynamics models, i.e., the Rayleigh−Plesset (RP) equation and the simplified RP, which is called the Rayleigh (R) equation in the following, to the prediction of the growth and collapse of cavitation bubbles in a diesel fuel injector. We propose the modified Rayleigh (MR) equation, which improves drawbacks of the former models. The agreement between calculated and measured bubble radii confirmed the validity of the RP equation. Numerical calculations are performed for various cases, such as a water injection at low injection pressure and a diesel fuel injection at high injection pressure. The proposed MR equation is confirmed to satisfy (i) low computational cost by using a large time step, (ii) avoiding a large numerical error using large time steps, and (iii) good estimations of the growth and collapse rates of cavitation bubbles under various pressure conditions.
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Biçer Barış, Sou Akira, Application of the improved cavitation model to turbulent cavitating flow in fuel injector nozzle, Applied Mathematical Modelling, 40, 7-8, 2016. Crossref
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Ghorbani Morteza, Sadaghiani Abdolali Khalili, Yidiz Mehmet, Koşar Ali, Experimental and numerical investigations on spray structure under the effect of cavitation phenomenon in a microchannel, Journal of Mechanical Science and Technology, 31, 1, 2017. Crossref
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Liu Hong, Cai Chang, Xi Xi, Yan Yan'an, Jia Ming, A novel model for the bubble growth in the cavitation region of an injector nozzle, International Journal of Heat and Mass Transfer, 119, 2018. Crossref
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Sun Yubiao, Guan Zhiqiang, Hooman Kamel, Cavitation in Diesel Fuel Injector Nozzles and its Influence on Atomization and Spray, Chemical Engineering & Technology, 42, 1, 2019. Crossref