Effect of particles on the flow structure and dispersion of solid impurities in a two-phase axisymmetric jet |
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Authors: | V I Terekhov M A Pakhomov |
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Institution: | 1.Kutateladze Institute of Thermophysics, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia |
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Abstract: | The Euler approach is used for studying the structure of a flow and the propagation of a disperse impurity in a submerged
two-phase jet for small values of the mass concentration of particles (M
L1 = 0 to 0.5) upon a variation of the size and material of particles in a wide range. The effect of particles on the propagation
of a two-phase jet, gas turbulence, and solid phase dispersion is analyzed. The addition of particles decreases the jet opening
angle, increases the jet range, suppresses turbulence, and deteriorates turbulent mixing with the surrounding submerged space.
It is shown that at the first stage, particle accumulation effects (pinching) in the axial region of the jet appear upon an
increase in the particle size and the density of the particle material. Then, upon an increase in the inertia of particles,
pinching changes to intense scattering of the disperse phase in the initial cross sections of the jet. The results are compared
with the results of measurements for mono- and polydisperse two-phase jet flows. |
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