›› 2012, Vol. ›› Issue (03): 563-568.

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Effect of bus side grill on engine underhood thermal environment

WANG Jing1,2, ZHANG Cheng-chun1, ZHANG Chun-yan1, REN Lu-quan1   

  1. 1. The Key Laboratory of Bionics Engineering, Ministry of Education, Jilin University, Changchun 130022, China;
    2. Teaching Center of Basic Course, Jilin University, Changchun 130062, China
  • Received:2011-07-17 Online:2012-05-01

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Abstract: Changes of underhood flow field and temperature field of at high-speed conditions before and after closure of the left grill of a bus engine compartment were analyzed with numerical simulation and experiment. The results indicated that: the rate of the cooling air flowing into the engine compartment from the left grill is higher than the rate of the hot air flowing out of the engine compartment from the fringe of grill. Before closure of the left grill of the bus engine compartment, the hot air reflected by the back door of the engine compartment can be hampered strongly by the cooling air flowing into the engine compartment. Closure of the left grill weakens the cooling air hampering, therefore, under the vehicle bottom air driving, the hot air flows out of the engine compartment more smoothly. Accordingly, closure of the left grill can not adversely affect the underhood thermal environment.

Key words: power machinery and engineering, thermal management, engine underhood, bus side grills, thermal fluid

CLC Number: 

  • TK441.2
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