Spreading rate and reattachment of coaxial jets of high meanvelocity ratio
Abstract
The flow characteristics of coaxial jets at five high meanvelocity ratios are investigated. Results show that the spreading rate in the mixing regions of the coaxial jets of high meanvelocity ratio depends on the zone where it is located. The rates in the outer mixing region of the initial merging zone and in the fully merged zone are the same and slightly higher than those in the intermediate merging zone, and these rates are independent of the meanvelocity ratio. On the other hand, the spreading rate of the inner mixing region depends greatly on the meanvelocity ratio, and it is found to approach that of a single jet. In addition, reattachment of the outer high velocity flow at the central axis also depends on the meanvelocity ratio, though to a lesser extent.
 Publication:

ASME Journal of Fluids Engineering
 Pub Date:
 September 1982
 Bibcode:
 1982ATJFE.104..400K
 Keywords:

 Coaxial Flow;
 Flow Characteristics;
 Flow Velocity;
 Jet Flow;
 Reattached Flow;
 Flow Distribution;
 Flow Measurement;
 Multiphase Flow;
 Ratios;
 Spreading;
 Fluid Mechanics and Heat Transfer