微小板対を用いた渦運動操作による噴流制御に関する研究(流体工学,流体機械)

概要

論文の詳細を見る
The influence of a pair of small plates located downstream the nozzle exit on the development of a round jet mixing layer is investigated by means of hot-wire measurements and flow visualization. The vortex motions in the round jet forced by unstable varicose modes are studied. It is found that a pair of the plates put in the shear layer with an equal angle leads to a control of the jet direction. The inclined vortex rings are formed due to the interaction between the plates and the roll-up vortex. The experimental results also suggest that the size of the plate is significant for the interaction in the jet. When the plates are set with an opposite inclination angle toward the jet center, the jet goes straight with reduced disturbances downstream. The velocity fluctuation measurements indicate that the peak amplitude at the vortex roll-up is greatly reduced. On the other hand, when the plates of an opposite angle are directed to the outside of the jet, the vortex rings move outside due to the inducedvelocity by the plates. In this case, the successive vortex pairing produces an increase in entrainment of the jet.
一般社団法人日本機械学会の論文
2005-02-25