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PIV를 이용한 직렬배열에서 2원주 주위의 유동장 특성 연구
노기덕(K. D. Ro),김광석(K. S. Kim),류성진(S. J. Ryu),김낙균(N. G. Kim),박만익(M. I. Park) 한국동력기계공학회 2006 한국동력기계공학회 학술대회 논문집 Vol.- No.-
The Characteristics of the flowfield around two circular cylinders in tandem arrangement was investigated by PIV. Strouhal numbers, velocity vectors and velocity profiles were observed at centre-to-centre space ratios of P/D=1.5, 2.0 and 2.5, and Reynolds number of Re=3.0×10³~5.0×10³. As the results the Strouhal numbers measured in the rear region of the cylinder of wake side were decreased with the space ratios. The flow between two cylinders was almost stagnated and the size of the stagnated region was larger in the close side than in the far side of the front cylinder. The direction of vortex between two cylinders was opposed each other with the small difference(α =±1.0˚) of the attack angle α.