Some characteristics of heat and mass transfer in a turbulent air flow over a surface

  • B. F. Boyarshinov
Article

Abstract

It is shown that, for a certain proportion between the rib height (2–15 mm) installed at the test-section entrance and the turbulence level of the main flow (1–26%), there are extrema of parameters that describe mass transfer on the surface of an evaporating liquid fuel. In tests with and without combustion, discrete changes in the rates of heat and mass transfer are observed. Conditions for their manifestation are analyzed.

Keywords

Direct Numerical Simulation Turbulent Boundary Layer Turbulence Level Perforated Plate Stanton Number 

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References

  1. 1.
    H. Le, P. Moin, and J. Kim, “Direct numerical simulation of turbulent flow over a backward facing step,”J. Fluid Mech.,330, No. 10, 349–376 (1997).MATHCrossRefADSGoogle Scholar
  2. 2.
    F. Spalart, M. Kh. Strelets, A. K. Travin, and M. L. Shur, “Calculation of hydrodynamics and heat transfer in a transitional separation bubble on a flat surface,” in:Proc. of the II Russian National Conf. on Heat and Mass Transfer (Moscow, October 26–30, 1998), Vol. 2:Forced Convection of Single-Phase Liquid, Moscow Power-Eng. Inst. Moscow (1998), pp. 240–243.Google Scholar
  3. 3.
    T. Ota and H. Nishiyama, “Correlation of maximum turbulent heat-transfer coefficient in reattachment flow region,”Int. J. Heat Mass Transfer,30, No. 6, 1193–1200 (1987).CrossRefGoogle Scholar
  4. 4.
    B. F. Boyarshinov, É. P. Volchkov, and V. I. Terekhov, “Heat and mass transfer in a boundary layer with evaporation and combustion of ethanol,”Fiz. Goreniya Vzryva,”,30, No. 1 8–15 (1994).Google Scholar
  5. 5.
    J. K. Batchelor,The Theory of Homogenecous Turbulence, Cambridge (1953).Google Scholar
  6. 6.
    P. E. Hancock and P. Bradshaw, “The effect of free-stream turbulence on turbulent boundary layers,” in:Proc. of Am. Soc. Eng.-Mech.: Transl. J.Trans. ASME. J. Ser. D,105, No. 3 (1983), pp. 126–133.Google Scholar
  7. 7.
    B. F. Boyarshinov, “Analysis of experimental data on heat and mass transfer in a boundary layer,”Fiz. Groeniya Vzryva,34, No. 2, 73–81 (1998).Google Scholar
  8. 8.
    M. F. Blair, “Influence of free stream turbulence on turbulent boundary layer heat transfer and mean profile development. Part 2. Analysis of results,” in:Proc. of Am. Soc. Eng.-Mech.: Transl. J.Trans. ASME. J. Ser. C,105, No. 1, 41–48 (1983).Google Scholar
  9. 9.
    A. I. Leont'ev, É. P. Volchkov, V. P. Lebedev, et al. (eds.),Thermal Protection of Plasma-Torch Walls, Vol. 15:Low-Temperature Plasma [in Russian], Inst. of Thermal Physics, Sib. Div., Russ. Acad. of Sci., Novosibirsk (1995).Google Scholar
  10. 10.
    T. Ota and N. Kon, “Heat transfer in the separated and reattached flow on a blunt flat plate,”Proc. of Am. Soc. Eng.-Mech.: Transl. J.Trans. ASME. J. Ser. C,96, No. 4, 29–31 (1974).Google Scholar
  11. 11.
    V. I. Terekhov and N. I. Yarygina, “Heat transfer in separation regions of turbulized flows,” in:Proc. of the II Russian National Conf. on Heat and Mass Transfer (Moscow, October 26–30, 1998), Vol. 2:Forced Convection of Single-Phase Liquid, Moscow Power-Eng. Inst, Moscow (1998), pp. 244–247.Google Scholar
  12. 12.
    É. Ya. Épik, L. E. Yushina, and T. T. Suprun, “Heat transfer in the relaxation region behind a local closed separation of various kinds,”-, pp. 282–285.Google Scholar
  13. 13.
    A. L. Yarin, “Detachment of the flame of a burning liquid by an air flow,”Fiz. Goreniya Vzryva,19, No. 1, 3–12 (1983).Google Scholar
  14. 14.
    C. R. Smith and S. P. Schwartz, “Observation of streamwise rotation in near-wall region of turbulent boundary layers,”Phys. Fluids,26, No. 3, 641–652 (1983).MathSciNetCrossRefADSGoogle Scholar
  15. 15.
    B. F. Boyarshinov, “Study of the reasons for nonmonotonic variation of the heat-transfer rate in a boundary layer,” in:Proc. of the II Russian National Conf. on Heat and Mass Transfer (Moscow, October 26–30, 1998), Vol. 2:Forced Convection of a Single-Phase Liquid, Moscow Power-Eng. Inst., Moscow (1998), pp. 66–69.Google Scholar

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© Kluwer Academic/Plenum Publishers 2000

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  • B. F. Boyarshinov

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