Effect of the weight of the admixture on the turbulence structure of a two-phase jet |
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Authors: | T A Girshovich V A Leonov |
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Affiliation: | (1) S. Ordzhonikidze Moscow Institute of Aviation, USSR |
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Abstract: | The effect of gravity on the turbulence structure of an inclined two-phase jet is evaluated according to the Prandtl theory of mixing length.Notation Cx
drag coefficient for a particle
- Dp
particle diameter
- gi
components of the acceleration g due to gravity acting on a particle in the direction of jet flow (gi=g sin ) and in the direction normal to it (gi=g cos )
- V poi
±, V goi
±
fluctuation components of the velocities of the particles and gas, respectively, at the end of a mole formation
- Vfi
free-fall velocity of a particle
-
l
u
mixing length
- mp
particle mass
-
t
p
length of time of particle-mole interaction
- V pi
±, V gi
±
positive and negative fluctuation velocities of particles and of the gas respectively, with the components u p
±, u g
±, v p
±, v g
±, k=V goi/Vfi
- V![prime](/content/xl2497741155042r/xxlarge8242.gif) i
±
relative velocity of the gas
-
jet inclination angle relative to the earth's surface
-
empirical constant
-
u,
jet boundaries in terms of velocity and concentration
-
u=y/
u
dimensionless velocity ordinate
-
=y/
dimensionless concentration ordinate
-
admixture concentration
- um, m
velocity and the concentration of the admixture at the jet axis
-
g
dynamic viscosity of the gas
-
s,
g
densities of the particle material and of the gas
-
g,
p
shearing stresses in the gas and in the gas of particles
-
m,
0
shearing stresses in the mixture and in pure gas, respectively
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 40, No. 3, pp. 422–426, March, 1981. |
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Keywords: | |
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