Energy Dissipation Studies on Submerged—Axially Symmetric—Twin Jets.

Studies on the energy dissipation of submerged high velocity water jets were made on twin jets (circular) in order to compare the energy dissipation characteristics of twin jets with those of a single jet counterpart when placed under otherwise identical conditions. The total efflux areas of both the twin jets and the efflux area of the single jet were made the same so that the initial energy of both the single and the dual jets were same under similar velocities. The experiments were conducted considering the different parameters like the efflux velocity, tail-water-level and the relative spacing between the jets. In all the cases it was found that the critical section within which the energy dissipation is predominating occurs at a shorter distance (from the mouth of the jet) for the twin jets than for a single jet. Within the range of experiments it was observed that the energy dissipation characteristics remain to be the same under different efflux velocities and the energy dissipation is more with lesser submergences. Finally, it was observed that shorter the relative spacing between the twin jets more will be the throw of the jets which fact is important in fixing up the length of the stilling basins under hydraulic structures.