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Single and two-phase inclined jets in a cross flow

M. J. Rempto
Departamento de Engenharia Mecanica, Universidade Federal do Rio de Janeiro, Rua Moniz de Aragao 360, 21945-972 Rio de Janeiro, Brazil

A. M. S. Suarez
Mechanical Engineering Program (COPPE/UFRJ), C.P. 68503, Rio de Janeiro, 21941-972

Atila P. Silva Freire
Mechanical Engineering Department, Federal University of Rio de Janeiro, Av. Moniz de Aragao 420, 21945-972 Rio de Janeiro, Brazil

Abstract

The behavior of single and two-phase jets at inclined injection angles with an incoming crossflow is studied numerically and experimentally. The numerical study investigates the mixing characteristics of singlephase transverse round jets in a circular pipe for one velocity ratio (Vr = 5.3 = Vj/U) and three injection angles (α = - 45°, 0° and 45°). The two-phase flow experimental investigation considers gas injection in water flow. The same three injection angles are studied. Comparison for the single phase jets includes mean and instantaneous data on the scalar and velocity fields. The computations are performed with the SST-model. The two-phase flow study presents global (pressure drop and flow rates) and local measurements. The distribution of the gas phase is characterized through the Shadow Sizer Technique. This same technique is used to evaluate the velocity of bubbles.

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