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2019中国汽车工程学会年会

作者： Ding Lefang Zheng Yong BEIQI FOTON Motor Co. Ltd.

Considering the attractive appearance and reduction of aerodynamic drag,more and more electric vehicles adopt the closed front grille,which causes the insufficient air intake of the condenser and weakens the heat exchange performance of the condenser.Through looking for the new air intake passage between the front cabin and the condenser,the heat exchange performance of the condenser is improved.The refrigeration effect of air-conditioning system before and after the improvement of the air intake passage of condenser is compared and evaluated by CFD numerical simulation and environmental chamber test method.CFD numerical simulation results show that the air intake mass per second of the condenser of optimized electric vehicle increased by 15.17%,and air-conditioning refrigeration performance of environmental chamber tests show that the average cabin temperature decreased by more than 3℃under various operating conditions.The measures to look for a new air intake passage for condenser can significantly improve the refrigeration effect of air-conditioning of electric vehicles and the comfort of cabin environment.The new scheme has been successfully applied to mass-produced vehicles.

关键词： electric vehicle closed grille air-conditioning refrigeration performance flow field optimization

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Study on Process Technology of Gas Bubbling Curtain Substituting Dam in the Tundish of Slab Casting

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Journal of Iron and Steel Research(International) 2011年第S2期18卷 256-262页

作者： JIN You-lin, SHEN Chang, ZHANG Jian-ping, ZHANG Jian (Technology Center of Ma’anshan Iron and Steel Co, Ltd , Ma’anshan 24300, Anhui, China) Maanshan Iron & Steel Co Ltd Ctr Technol Maanshan 24300 Anhui Peoples R China

This paper presents experimental results from physical and mathematical simulation of liquid steel flow in the tundish adopting gas bubbling curtain substituting dam and industrial trials have been investigated based the experimental results. Physical and mathematical simulation results show the gas bubbling curtain can improve pattern of liquid flow in the tundish , accelerate inclusions flotation,and simultaneity metallurgy effect has been further improved when combining weir and turbulence inhibitor. The industrial trial results confirm that content of oxygen , nitrogen and inclusions in continuous casting billets have been reduced when gas bubbling curtain combining weir and turbulence inhibitor.

关键词： gas bubbling curtain physical simulation flow field optimization mathematical simulation

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Simulation and optimization for an SUV Cooling System

Simulation and Optimization for an SUV Cooling System

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2021中国汽车工程学会年会暨展览会

作者： Xu Xiang Zhang Yilun Zhao Feng Yi Hucheng Wang Yuan Xu Junfang CATARC (TianJin) Automotive Engineering Research Institute Co. Ltd

In order to solve the problem that engine coolant outlet temperature of an SUV was too high in low and medium speed climbing and high speed conditions,1 D/3 D co-simulation tool were used to establish a simulation model of whole vehicle cooling system.Through test and simulation,different factors that affect cooling system thermal balance performance were analyzed.The research found out that:Independent cooling loop for transmission and engine can significantly reduce engine coolant outlet temperature.Cooling system pipe arrangement has an influence on coolant flow distribution,but has little influence on coolant temperature.By optimizing radiator type and underhood arrangement,underhood flow field characteristics can be improved and inlet air flow rate of cooling system was increased.So the cooling system capacity has been improved.

关键词： cooling system thermal balance co-simulation flow distribution flow field optimization

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