Discretization and Heat Transfer Calculation of Engine Water Jackets in 1D-Simulation

Mandl, F.; Grill, Michael; Bargende, Michael

doi:10.4271/2020-01-1349

Cited by 1 publication

(1 citation statement)

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“…For the validation of CFD model, the simulation results are often compared in detail with the experimental results regarding mass flow rate, inlet-outlet temperature or pressure drop. [39][40][41] Therefore, to validate the CFD model built in this work, the method of monitoring flowrate, inlet-outlet pressure difference, and coolant temperature in cooling system of engine during engine thermal balance bench test is used for obtaining flow resistance characteristic curve of water jacket and the coolant outlet temperature. [42][43] The measured pressure drop of water jacket under different volume flowrate is compared with simulated value.…”

Section: Physical Model and Mesh Modelmentioning

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: Physical Model and Mesh Modelmentioning

confidence: 99%