90°曲がったノズルからの噴流 : 第2報,ノズルの曲率の影響

概要

論文の詳細を見る
Experimental investigation has been made of free jets issuing from three curved nozzles, which are 90° circular bend with a diameter 40 mm and curvature radii of 80, 160, and 240 mm. Mean and fluctuating velocities are measured by the method of rotating a probe with an inclined hot wire. The following conclusions are derived from the experimental results: (1) The jet axis shifts from the curved nozzle axis, and the shifting distance is longer as the curvature radius of the nozzle is smaller; (2) The maximum axial velocity of the curved nozzle jet decays more rapidly than that of a straight nozzle jet; (3) The spread of the jet is almost independent of the curvature radius; (4) The velocity profiles are skewed by a secondary flow near the curved nozzle and become gradually smooth towards the downstream.
一般社団法人日本機械学会の論文
1989-04-25