A Design of Cooling Water Jacket Structure and an Analysis of Its Coolant Flow Characteristics for a Horizontal Diesel Engine

Lei, Jilin; Shen, Lizhong; Bi, Yuhua; Jian-ming, Chen

doi:10.4271/2011-01-2187

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…For HTC requirements of water jacket design in engineering, it is generally required to be evenly distributed and not lower than 5000 W/(m 2 •K) in high heat load area. 57 The distribution of the HTC of the water jacket could reflect whether a heat transfer capacity of the engine water jacket was good or not. 58 The HTC distribution in original water jacket indicates that the heat transfer capacity of the engine water jacket is not good and need to be improved.…”

Section: Comparison Analysis Between Original and Optimized Water Jacketmentioning

confidence: 99%

CFD modelling on flow field characteristics of engine cooling water jacket and its cooling performance improvement based on coolant transport path analysis method

Tan

Yuan

Huang

2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Reasonable coolant flow distribution and its heat transfer coefficient (HTC) distribution are of great significance to the cooling performance of water-cooled engine. Therefore, the present paper proposes a coolant transport path analysis method aiming at analyzing coolant velocity distribution and optimizing the coolant flow characteristics of water jacket based on Computational Fluid Dynamics (CFD), with particular emphasis on the assessment of coolant flow velocity distributions of high-temperature area of engine head water jacket. First, the coolant flow characteristics of a single-cylinder water jacket is investigated and it is found that coolant velocity of exhaust bridge is less than 1.5 m/s and the HTC distribution of water jacket under three flow conditions of 15 L/min, 25 L/min and 35 L/min have a small area reaching 5000 W/(m2∙K). Some areas have no coolant flow and the mass flowrate distribution of each gasket hole is unreasonable, proving that original water jacket structure has some shortcomings and need to be optimized. Based on coolant transport analysis, an improved design of the single cylinder water jacket is proposed and HTC distribution of improved water jacket meet cooling requirements that HTC in high heat load area are above 5000 W/(m2∙K). The coolant transport path analysis method for optimizing coolant flow characteristics of water jacket proves to be an effective way through successful application and remarkable achievement in the other single-cylinder water jacket and two-cylinder water jacket that coolant flow distribution become more reasonable and coolant velocity of high-temperature areas are bigger than 1.5 m/s.

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Section: Comparison Analysis Between Original and Optimized Water Jacketmentioning

confidence: 99%

CFD modelling on flow field characteristics of engine cooling water jacket and its cooling performance improvement based on coolant transport path analysis method

Tan

Yuan

Huang

2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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CFD simulation and investigation on flow field characteristics and temperature predictions of an electric generator unit

Tan

Yuan

Huang

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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Numerical Transient Thermo-Mechanical Analysis of Cylinder Head and Valve within a 400cc Engine

Tsai,

Huang,

Chang

2017

SAE Technical Paper Series

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<div class="section abstract"><div class="htmlview paragraph">In this paper, the temperature of coupling system including cylinder, head, inlet/exhaust valve, and the cooling jacket of a 400cc engine is investigated by computational fluid dynamic (CFD) method. Firstly, the total pressure loss of water jacket, radiator, and thermostat is calculated first, and then the mass flow rate inside the cooling system can be determined by fitting the water pump’s performance curve (P-Q curve). The thermal boundary conditions for analysis of conjugate heat transfer of cooling system, such as combusting gas temperature and heat transfer coefficient are utilizing the results of 1-D engine simulation software (Ricardo WAVE). The current approach is that the heat transfer coefficients of valve while opening are calculated by considering the intake and exhaust stroke using FLUENT to overcome the difficulty of these values that are not modeled in such 1-D software. Finally, the finite element method (FEM) is used for the valve stress calculation.</div><div class="htmlview paragraph">The results indicate that the temperature, pressure loss and the flow rate of coolant exhausted from the cooling jacket are concurred with those of experimental results. In addition, the distributions of convective heat transfer coefficients of valves are found to have different behavior for five sections of valve defined in this study. Therefore, this method is expected to predict the transient temperature distribution of valve seats and valves with a high degree of accuracy. The results show that maximum valve stress can be found in the seat face of the intake/exhaust valves because of the thermal gradient.</div></div>

show abstract

A Design of Cooling Water Jacket Structure and an Analysis of Its Coolant Flow Characteristics for a Horizontal Diesel Engine

Cited by 3 publications

References 12 publications

CFD modelling on flow field characteristics of engine cooling water jacket and its cooling performance improvement based on coolant transport path analysis method

CFD modelling on flow field characteristics of engine cooling water jacket and its cooling performance improvement based on coolant transport path analysis method

CFD simulation and investigation on flow field characteristics and temperature predictions of an electric generator unit

Numerical Transient Thermo-Mechanical Analysis of Cylinder Head and Valve within a 400cc Engine

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