A Practical Simulation Approach for Truck Cooling System At Early Stage Design Process and Development

Pan, Fongloon Peter; Schoon, Ronald; Putta, Suresh; Ogale, Anil; Chen, Cheng

doi:10.4271/2010-01-1927

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…There has been some core theories of enhanced convective heat transfer applied in heat exchangers and engine compartment, including the principle of minimum entropy production, the field synergy principle (FSP), and the minimum principle of entransy dissipation (MPED). Prigogine (1963) proposed the principle of minimum entropy production. Bejan (1996) proposed that the minimum entropy production of a system corresponds to the optimal thermodynamic performance, optimizing the geometric parameters of parallel plate counter-current heat exchangers with the objective of minimizing the entropy production (Bejan, 1996;Ordóñez and Bejan, 2015).…”

Section: Introductionmentioning

confidence: 99%

Application of the multi-field coupling enhanced heat transfer principle to the engine compartment design of clean gas bus

2020

Mech. Sci.

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Abstract. Clean gas engines, such as liquefied petroleum gas (LPG) engines, have high thermal loads on parts under equivalent specific combustion. This study examines the multi-field coupling enhanced heat transfer principle and its applications to the engine compartment of a typical LPG city bus. The field synergy enhanced heat transfer principle (FSP) was applied in the radiator assembly area. The FSP model yielded an optimum velocity -temperature gradient matching field that would improve convective heat transfer in this area. To strengthen the convective heat transfer ability of the limited cooling air in the cabin, temperature field homogenization (TFH) in the core flow region of the engine block area was achieved. The TFH optimization model helped minimize the temperature gradient in the core flow region and maximize it at the heat transfer boundary, and the optimum vector field and flow path were obtained. More comprehensive changes to the structural design were made according to the multi-field coupling enhanced heat transfer principles. The simulation results showed that in the comprehensive structure, the heat transfer efficiency of the radiator increased by 14.66 %, the average temperature of the air passages in the engine block area decreased by 22.23 %, and the heat dissipation coefficient of the engine body and engine cover increased by 4.60 times and 3.49 times, respectively.

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Section: Introductionmentioning

confidence: 99%

Application of the multi-field coupling enhanced heat transfer principle to the engine compartment design of clean gas bus

2020

Mech. Sci.

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“…In the early investigations of the numerical methods, one-dimensional approximation was commonly performed (Pang, Kalam, Masjuki, & Hazrat, 2012). In recent decades, advances in numerical techniques have made the computational fluid dynamic (CFD) tools powerful and cost effective alternatives on complex underhood airflows (Caltrider, Davis, Madhavan, & Veling, 1993;Costa, 2003;Dinc, Arslan, Akgun, & Almenar, 2010;Ding, Williams, Karanth, & Sovani, 2006;Pan, Schoon, Putta, Ogale, & Chen, 2010) to figure out the impact of the simulations on design and development processes. Davis, Veling, Caltrider, and Madhavar (1993) performed three dimensional CFD simulations on the cooling system of light trucks; in addition they discussed the necessity for an underhood thermal management model.…”

Section: Introductionmentioning

confidence: 99%

Effect of fan and shroud configurations on underhood flow characteristics of an agricultural tractor

Ozturk

Çetin

Yavuz

2019

Engineering Applications of Computational Fluid Mechanics

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In the current study, effects of two different underhood geometry modifications namely; fan position relative to shroud and fan tip clearance, on airflow through an agricultural tractor engine cooling system are investigated by utilizing CFD modeling. For the characterization of each modification, the underhood components are reduced to a domain of cooling systems including only fan, shroud, and radiator that allows saving in computational time and cost. The models are validated using a custom designed underhood flow setup, where hotwire velocity measurements at proximity to the radiator are conducted. The mass flow rate and the uniformity of the airflow through the radiator are quantified as performance parameters. For the former modification, position of fan relative to shroud, the computations are performed for the percentages of fan projection into shroud (FPiS) varying from 78% to 0% at fan rotational speeds of 2060 and 2800 rpm. The optimum fan location is found to be around 56-60% for both rotational speeds that leads 8% increase in mass flow rate compared with the pre-design location of 74%. In addition, a noticeable reduction in the relative magnitude of the RMS velocity through the radiator is obtained for the moderate FPiS values. For the latter modification, fan tip clearance, the computations are performed for the tip clearance values varying from 5.25to 12 mm at a fan rotational speed of 2060 rpm. As the tip clearance decreases up to 6 mm, air mass flow rate can be improved by 7%. However, further reduction in tip clearance does not improve the air mass flow rate instead it decreases, suggesting an optimum tip clearance value. The results suggest that the proper geometrical modifications in engine cooling systems might induce significant improvement in the aforementioned performance indicators.

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Numerical Simulation and Optimization of the Underhood Fluid Field and Cooling Performance for Heavy Duty Commercial Vehicle under Different Driving Conditions

Yang

Wang

Dang

et al. 2015

SAE Technical Paper Series

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A Practical Simulation Approach for Truck Cooling System At Early Stage Design Process and Development

Cited by 4 publications

References 9 publications

Application of the multi-field coupling enhanced heat transfer principle to the engine compartment design of clean gas bus

Application of the multi-field coupling enhanced heat transfer principle to the engine compartment design of clean gas bus

Effect of fan and shroud configurations on underhood flow characteristics of an agricultural tractor

Numerical Simulation and Optimization of the Underhood Fluid Field and Cooling Performance for Heavy Duty Commercial Vehicle under Different Driving Conditions

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