一様流中に置かれた十字交差2円柱の音響特性 : 第3報,円柱表面の圧力変動と後流の速度変動

抄録

In the turbulent wake behind the upstream cylinder in uniform flow, the downstream cylinder was set in the form of an intersection with the upstream cylinder. It was found that the acoustic radiation from the two circular cylinders forming a cross was far smaller, in comparison with that from one cylinder. Measurements were made on (1) the fluctuating surface pressure distributions on both cylinders, and (2) the mean velocity profiles and fluctuating velocity distributions in the turbulent wake behind the upstream cylinder. Then, the relation between the flow and the noise generation was studied.