抄録
It has been found that a compound swirl flow which is composed of a round jet and a coaxial annular swirl jet is very useful for a push-pull type ventilator. As a fundamental study on the compound swirl flow, the mean velocity components were measured using an inclined hot wire probe. In the case of the swirl number 0.38 and the flow ratio of annular swirl jet to the round jet 0.18, it was found that by combining the round jet and a coaxial annular jet the jet radius reduces and the swirl flow collapses in the down stream direction. Then there exists the flow where the energy density is relatively strong in the near region of the jet.
