Volume 19, Issue 2 (2019)                   Modares Mechanical Engineering 2019, 19(2): 363-373 | Back to browse issues page

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Gholinia M, Pourfallah M, Chamani H. Numerical Simulation of the Boiling Phenomenon in Improving the Cooling of a Heavy-Duty Diesel Engine with Natural Gas. Modares Mechanical Engineering. 2019; 19 (2) :363-373
URL: http://journals.modares.ac.ir/article-15-19176-en.html
1- Mechanical Engineering Department, Mechanical Faculty, Babol Noushirvani University of Technology, Babol, Iran
2- Mechanical Engineering Department, Engineering Faculty, Mazandaran University of Science & Technology, Babol, Iran , m.pourfallah@ustmb.ac.ir
3- Mechanical Engineering Department, Mechanical Engineering School, Iran University of Science & Technology, Tehran, Iran
Abstract:   (671 Views)
The heat transfer from walls has a significant role in the correct estimation of temperature distribution in order to investigate the thermal stresses and low cycle fatigue in the engine liner. Therefore, it is necessary to investigate the details of the flow and heat transfer over a wide range of engine operation in the design and exact simulation of the cooling jacket. An efficient approach to study the cooling system is to simulate using Computational Fluid Dynamics (CFD) as a three-dimensional model by simultaneously solving the structure and fluid, which leads to accurate prediction of wall temperature and heat flux. In the present paper, the distribution of heat transfer coefficients (HTC) in the cooling jacket of a 16-cylinder heavy-duty diesel engine has been calculated, using ANSYS/Fluent based on 3D-CFD method. Also, equations of subcooled boiling phenomenon have been solved based on two commonly used patterns of Chen and BDL, and the effects of fluid pressure, velocity, and temperature at the time of the phenomenon of boiling on the heat transfer of cooling jacket wall have been studied. The results indicate that the best condition for a cooling jacket is when the coolant flow in critical heat points reaches to a velocity so that subcooled nucleate boiling occurs.
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Received: 2018/04/19 | Accepted: 2018/10/15 | Published: 2019/02/2

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