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Effects of Flow Ratio of Transverse Jet on Flow and Heat Transfer : A LBE Study

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Abstract

A Lattice Boltzmann Equation (LBE) method is utilized to simulate a transverse jet in cross flow (TJiCF) to investigate the interaction between the transverse jet and the main flow by using the TD2G9 model. Seven cases of different flow ratios (Jr = 0.3, 0.6, 0.9, 1.2, 1.5, 1.8, 2.0) are simulated. The influences of flow ratio (Jr) of the transverse jet to the main flow on vortex streets and temperature fields are studied. The characteristics of fluid vortex, mean axial velocity, mean temperature, fluctuating velocity, etc., are studied in details to show the effects of Jr. Significant changes of velocity and temperature fields are found in TJiCFs for Jr > 1, i.e. the turbulence is augmented significantly and the convective and conductive heat transfer are enhanced greatly too. The turbulence augmentation is especially evident in the recirculation zone after the transverse jet. The conductive heat transfer is enhanced by thinning the thermal boundary layer near the wall, and the convective heat transfer is enhanced by intensive fluid mixing between the transverse jet and main flow.

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Authors and Affiliations

  1. College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing, 102249, People’s Republic of China

    Nan Gui, Wenkai Xu & Liang Ge

  2. China Academy of Space Technology, Beijing, 10094, People’s Republic of China

    Jie Yan

Authors
  1. Nan Gui
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  2. Wenkai Xu
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  3. Liang Ge
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  4. Jie Yan
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Correspondence to Nan Gui.

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Gui, N., Xu, W., Ge, L. et al. Effects of Flow Ratio of Transverse Jet on Flow and Heat Transfer : A LBE Study. Flow Turbulence Combust 95, 61–77 (2015). https://doi.org/10.1007/s10494-015-9606-4

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  • DOI: https://doi.org/10.1007/s10494-015-9606-4

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