D212 EVOLUTION OF THE COUNTER-ROTATING VORTEX STRUCTURE IN A CROSSFLOW JET(Ventilation/vortex flow measurement)
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概要
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The structure of counter-rotating vortex pair of a round jet issuing normally into a crossflow was studied using a flow visualization technique and PIV measurements. Experiments were performed at a jet-to-crossflow velocity ratio 3.3, and the Reynolds number of 1,050, based on the crossflow velocity and jet diameter. Instantaneous velocity field was acquired using two frame cross correlation PIV technique. The angle of laser sheet beam was set to be perpendicular to the ensemble averaged trajectory of the crossflow jet. The mean velocity field was obtained by ensemble averaging over 300 realizations of instantaneous velocity fields for each plane. It was found that the counter-rotating vortex pair was initiated from the hanging vortices appeared at both sides of the jet column. The detail characteristics of the velocity fields were discussed with the evolution of counter-rotating vortex pair.
- 一般社団法人日本機械学会の論文
- 2000-10-01
著者
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KIM Kyung
School of Mechanical Engineering, Pusan National University
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Park Ki
School Of Mechanical Engineering Pusan National University
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Kim Kyung
School Of Mechanical Engineering Pusan National University
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Kim Kyung
School Of Food Biotechnology Woosong University
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