• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 28 Issue 2
Apr.  2015
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Article Contents
YANG Yang, WANG Yi, LI Yanbin. Flow Field Characteristics of Exhaust Flow Assisted with a Jet[J]. Journal of Southwest Jiaotong University, 2015, 28(2): 347-353. doi: 10.3969/j.issn.0258-2724.2015.02.022
Citation: YANG Yang, WANG Yi, LI Yanbin. Flow Field Characteristics of Exhaust Flow Assisted with a Jet[J]. Journal of Southwest Jiaotong University, 2015, 28(2): 347-353. doi: 10.3969/j.issn.0258-2724.2015.02.022

Flow Field Characteristics of Exhaust Flow Assisted with a Jet

doi: 10.3969/j.issn.0258-2724.2015.02.022
  • Received Date: 09 Apr 2014
  • Publish Date: 25 Apr 2015
  • To decrease the jet flow rate in contaminants control for a purpose of energy conservation, the flow field characteristics of exhaust flow assisted with a jet was focused. When the angle between the jet and the exhaust flow ranges from 90to 60 , utilizing the numerical simulation, the conditions to form steady flow was determined and the changes of the centerline velocity and control region of the exhaust flow were studied. Meanwhile, based on simulation results and the analysis of the factors that affect centerline velocity and control region, two calculation methods for the decay of centerline velocity and control region of the exhaust flow with different were obtained. The results show that when is less than 70, the steady exhaust flow can not form;when ranges from 90to 70, the increase rate of the centerline velocity drops with the momentum ratio of the jet and the exhaust flow increasing, while the increase rate of the centerline velocity increases when decreases. Thus, the exhaust flow can be enhanced by decreasing , which effectively control contaminants.

     

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  • ASHRAE. 2007 ASHRAE handbook: HVAC applications
    HYLDGARD C E. Aerodynamic control of exhaust
    [S]. Atlanta: ASHRAE, 2007.
    HOGSTED P. Air movements controlled by means of exhaustion
    [C]//International Conference on Air Distribution in Ventilated Spaces. Stockholm: SCANVAC, 1987, session 1: 3.
    PEDERSEN L G, NIELSEN P V. Exhaust system reinforced by jet flow
    林豹,于光荣. 射流作用下吸气流场速度分布计算的研究
    HUNT G R, INGHAM D B. Long range exhaustion-a mathematical model for the axismmetric air flow of a local exhaust ventilation hood assisted by a turbulent radial jet
    [C]//ROOMVENT'87. Stockholm: SCANVAC, 1987: 1-6.
    KREJCI V, KOSNER J. Large eddy simulation of a radial jet
    WEN X, INGHAM D B. Theoretical and numerical prediction of two-dimensional Aaberg slot exhaust hoods
    [C]//The 3rd International Symposium on Ventilation for Contaminant Control. Cincinnati: ACGIH, 1991: 203-208.
    贺素艳,王英敏,苏涛. 一种气幕式排风罩性能参数优化的研究
    刘敏,林豹. 锥形Aaberg排风罩捕集颗粒污染物的数值模拟
    [J]. 通风除尘,1992,12(2): 1-6. LIN Bao, YU Guangrong. Study on the velocity distribution calculation of the exhaust flow associated with a jet
    CHEN Q. Comparison of different k- models for indoor air flow computations
    [J]. Building Energy and Environment, 1992, 12(2): 1-6.
    ROUND O, HAVET M. Computation of the airflow in a pilot scale clean room using k- turbulence models
    [J]. Annals of Occupational Hygiene, 1996, 40(2): 171-196.
    LI Yuguo, NIELSEN P V. CFD and ventilation research
    SAUNDERS C J, FLETCHER B. Jet enhanced local exhaust ventilation
    孙一坚. T-112-03103-6 简明通风设计手册
    [C]//Experimental Fluid Mechanics 2008. Liberec: SPIE, 2008: 91-97.
    [J]. Annals of Occupational Hygiene, 2000, 44(5): 375-390.
    [J]. 暖通空调,2000,30(5): 9-11. HE Suyan, WANG Yingmin, SU Tao. Optimization investigation on performance parameters of an air curtain exhaust hood
    [J]. Heating Ventilating Air Conditioning, 2000, 30(5): 9-11.
    [J]. 节能,2012(1): 25-27 LIU Min, LIN Bao. Numerical simulation of particle controlling with a subulate Aaberg hood
    [J]. Energy Conservation, 2012(1): 25-27.
    [J]. Numerical Heat Transfer, Part B: Fundamentals,1995, 28(3): 353-369.
    [J]. International Journal of Refrigeration, 2002, 25(3): 351-361.
    [J]. Indoor Air, 2011, 21(6): 442-453.
    [J]. Annals of Occupational Hygiene, 1993, 37(1): 15-24.
    [S]. 北京:中国建筑工业出版社,1997.
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