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

Tan, Libin; Yuan, Yuejin; Huang, Chen; Yu, Qianying

doi:10.1007/s40430-021-02981-y

Cited by 5 publications

(2 citation statements)

References 46 publications

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“…Therefore, the mathematical model for this work includes the fluid flow governing equations (continuity equation, momentum equation, and energy equation) and turbulence model equations (k equation, ε equation) that need to be solved through the iteration solution process of CFD software. 35–39 For the fluid-coupling analysis model, the heat transfer between the fluid domain and solid domain is described by the Fourier conduction equation and the convective heat transfer governing equation of the fluid as follows:…”

Section: Physical Model and Mathematical Modelmentioning

confidence: 99%

Collaborative optimization on cooling channel flow resistance and winding temperature for integrated cooling of motor and controller

Tan,

Yuan,

Tang

2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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The efficiency and working performance of the motor and controller system in micro-electric vehicles depends mainly on its thermal performance, which is contingent upon effective and active cooling. The working temperature of the motor and controller may be too high during operation, which properly causes motor power reduction or motor breakdowns. Therefore, it is crucial to design a good cooling channel for better cooling the integrated motor and controller system. This work proposes an integrated cooling channel of motor and controller, and the fluid-solid coupling analysis is applied for analyzing the velocity, pressure distributions of the cooling channel, and temperature distributions of motor solid components. Meanwhile, the collaborative optimization method based on the multi-island genetic algorithm (MIGA) is used to attain optimal design parameters of the integrated cooling channel of the motor and controller for obtaining a better cooling channel design with lower flow resistance and lower winding temperatures. Results show that the original cooling channel’s flow resistance and maximum winding temperature are 31.87 kPa and 120.04°C, respectively. The flow resistance and winding temperature are pretty significant. After optimization, the local vortex flow and zero velocity area in optimal cooling channel design are improved, the coolant flow velocity becomes more uniform, and the flow resistance is significantly reduced. The flow resistance and maximum winding temperature of the optimal cooling channel design are 12.5 kPa and 116.76°C, respectively, which are decreased compared with the original cooling channel structure, with a decrease of 39.4% and 2.7%, respectively. The research findings in this work can provide theoretical reference for solid components temperature evaluation of motor and give valuable data to cooling performance evaluation and optimization of integrated cooling channel for motor and controller system.

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Section: Physical Model and Mathematical Modelmentioning

confidence: 99%

Collaborative optimization on cooling channel flow resistance and winding temperature for integrated cooling of motor and controller

Tan,

Yuan,

Tang

2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Meanwhile, this approach has become widely used in many different fields due to its short-term development cycle, and obtained remarkable achievements. [10][11][12][13][14] Due to the CFD method's advantage of the effectiveness in providing a precise prediction of internal flow field pattern and heat transfer, many researchers take full advantage of CFD technology to conduct the coolant flow analysis and cooling performance improvement of engine cooling water jacket. For example, Fontanesi et al 15 investigated the internal coolant flow characteristics of multi-cylinder cooling water jacket of a diesel engine and conducted the experimental measurement for verification of simulation, proved the accuracy of CFD simulation.…”

Section: Introductionmentioning

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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Numerical simulation on fluid flow and temperature prediction of motorcycles based on CFD

Tan

Yuan

Tang

et al. 2022

Alexandria Engineering Journal

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

Cited by 5 publications

References 46 publications

Collaborative optimization on cooling channel flow resistance and winding temperature for integrated cooling of motor and controller

Collaborative optimization on cooling channel flow resistance and winding temperature for integrated cooling of motor and controller

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

Numerical simulation on fluid flow and temperature prediction of motorcycles based on CFD

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