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Structure of the Detached Gas–Droplet Flow and Heat Transfer in an Axisymmetric Confuser

  • HYDROGASDYNAMICS IN TECHNOLOGICAL PROCESSES
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Journal of Engineering Physics and Thermophysics Aims and scope

Results of a numerical investigation of the influence of a negative longitudinal pressure gradient, arising at an abruptly enlarged cross section of a pipe with an axisymmetric confuser, on the structure of the turbulent gas–droplet flow and the heat transfer in the confuser of the pipe are presented. It is shown that a favorable pressure gradient in such a pipe significantly influences the characteristics of the two-phase flow and the heat transfer in its confuser. An increase in the convergence angle of the confuser in this pipe leads to a decrease in the turbulence of the gas–droplet flow in it by more than four times compared to the turbulence of the gas–droplet flow downstream of an abruptly enlarged cross section of an analogous pipe with no convergence (φ = 0o). It was established that the recirculation zone in the gas–droplet flow in the confuser is substantially smaller in length (by 30%) and the point at which the heat transfer in it reaches a maximum is shifted somewhat downstream, as compared to those in the gradient-free detached gas–droplet flow in the pipe with no convergence, and the coordinate of the maximum heat transfer in the confuser is practically coincident with the coordinate of the attachment of the detached two-phase flow in it.

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Authors and Affiliations

  1. S. S. Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, 1 Acad. Lavrentiev Ave, Novosibirsk, 630090, Russia

    M. A. Pakhomov & V. I. Terekhov

Authors
  1. M. A. Pakhomov
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  2. V. I. Terekhov
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Correspondence to M. A. Pakhomov.

Additional information

Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 94, No. 6, pp. 1507–1517, November–December, 2021.

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Pakhomov, M.A., Terekhov, V.I. Structure of the Detached Gas–Droplet Flow and Heat Transfer in an Axisymmetric Confuser. J Eng Phys Thermophy 94, 1473–1483 (2021). https://doi.org/10.1007/s10891-021-02427-1

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  • DOI: https://doi.org/10.1007/s10891-021-02427-1

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