Measurements in merging flow

Time average velocity magnitudes and directions of two intersecting submerged turbulent air jets of approximately equal strengths were measured. A three dimensional pitot-type probe was used. Measurements were taken in the plane of the nozzles, and cross sectional data was obtained at four stations, three of these being in the observed reverse flow. It is shown that the reverse flow spreads much more rapidly perpendicular to the nozzle plane than in the nozzle plane, whereas the forward flow is fairly symmetric. Similarity profiles were found in both the forward and reverse flows. In the forward flow the distribution was essentially Gaussian. This was also true in the backward flow in the direction normal to the plane of the nozzles. In the plane of the nozzles the backward flow profiles were close to semi-elliptical or semicircular, depending on the scales for plotting.