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The effect of particles on the gas velocity in a free turbulent flow

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Journal of Engineering Physics and Thermophysics Aims and scope

Abstract

The article describes experimental studies carrid out to investigate the interaction between gas and particles in a free turbulent two-phase flow at the outlet from a rather long vertical tube.

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Abbreviations

A :

cross-sectional area of the flow

A 0 :

initial cross-sectional area of the flow

d :

diameter of the flow

d p :

average diameter of particles

I i :

initial momentum of the two-phase flow

k :

mass ratio of particles and gas (k=m p/m g)

k 0 :

mass ratio of particles and gas in the initial cross-section of the two-phase flow (x=0)

m g :

mass flow rate of gas

m p :

mass flow rate of particles

r :

instantaneous radius of the flow

r 0 :

radius of the initial cross-section of the flow

r 1/2 :

normal distance from the flow axis to the point at which the velocity of gas is equal to the half of the axial velocity

R :

cross-sectional radius of the flow

u :

velocity

u a :

air velocity

u fa :

gas velocity on the flow axis

u g :

gas velocity

u av :

average gas velocity in the initial cross-section for two-phase and single-phase flows

u 0 :

gas velocity on the axis of the initial cross-section of the flow

u p :

particle velocity

x :

distance along the axis from the original of coordinates

ρg :

gas density

References

  1. P. O. Hedman and L. D. Smooth, AIChE J.,21, No. 2, 372 (1986).

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  2. F. Durst and M. Zare, Laser-Doppler Measurements in Two-Phase Flows, LDA Symp. Copenhagen (1975).

  3. G. N. Abramovich, Theory of Turbulent Jets [in Russian], Moscow (1960).

  4. Y. Levy and F. C. Lockwood, Combustion and Flame, Vol. 40 (1981).

  5. M. B. Stakič, Characterization of Particle-Laden Gas Jets (in Serbian), Master Thesis, Belgrade (1985).

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Authors
  1. M. B. Stakič
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  2. D. Z. Milojevič
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Additional information

Institute of Nuclear Research Vinča, Laboratory of Thermal and Power Engineering, Belgrade, Yugoslavia. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 68, No. 3, pp. 361–365, May–June, 1995.

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Stakič, M.B., Milojevič, D.Z. The effect of particles on the gas velocity in a free turbulent flow. J Eng Phys Thermophys 68, 302–306 (1995). https://doi.org/10.1007/BF00859039

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  • DOI: https://doi.org/10.1007/BF00859039

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