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Heat Transfer Research

ISSN for PRINT: 1064-2285

Institutional price:	$2485.00
Issues per year:	8

Best Paper Award Selection - Editorial Board Site

2001, Volume32

174 pages

Issue price - $1011.00

Nonisothermal Mixing of a Near-Wall Gas-Liquid Jet with a Flow in a Tube

K. A. Sharov
S. S. Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

N. E. Shishkin
S. S. Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

V. P. Lebedev
S. S. Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia

ABSTRACT

Jet mixing of a main hot flow with a coaxial near-wall gas- droplet jet in a horizontal cylindrical channel is studied experimentally. The experiments are conducted at a velocity of a main flow at the inlet to the working section of 30-40 m/sec, a value of the Reynolds number (1—2)·10⁵. The main flow of air was heated to 50, 100, and 150°C. Mass concentration of water droplets in the near-wall jet amounted to 0,5,10%.
A structure of the flow in the tube is considered by the radial curves of the temperature of "dry" and "wet" thermometers and also by the distribution of a temperature of an adiabatic wall along the channel length. It is shown that evaporation of liquid droplets in the mixing zone, a liquid film formed on the wall leads to a two-fold decrease of temperature near the surface.