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Information Journal Paper

Title

Study of Obstacle Oscillation in the Presence of a Fix Upstream Obstacle, Using a Physical Model

Pages

  97-106

Abstract

 Hydraulic structures in some cases, cause to produce Obstacles in path of the flow that create oscillating vortices in downstream of the Obstacles. Vortices produce oscillating forces to the Obstacle that are harmful for the stability of structure. In recent years this phenomenon is used to create clean energy. In this study, Oscillation of an Obstacle in the presence of a fixed Obstacle at the upstream was examined. The experiments on triangular block were carried out under varying discharge and different upstream distances. The main objective of this study was to investigate the effect of parameters of velocity and upstream Obstacle distance on the Oscillation frequency. Using dimensional analysis, the dimensionless parameters of Strouhal number, Reynolds number and ratio of distance to diameter were obtained. The charts of the relationship of the Reynolds number and also the ratio of distance to diameter vs. the Strouhal numbers were plotted. Finally, a new relationship was presented using data analysis and spss20 software to estimate the Strouhal number. Verifying the proposed relation, confirmed a fairly good prediction of this relation.

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    • Cite

    APA: Copy

    Etminan, m.r., JAFARI, A., JALILI, S., & ZAHIRI, J.. (2018). Study of Obstacle Oscillation in the Presence of a Fix Upstream Obstacle, Using a Physical Model. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), 28(2 ), 97-106. SID. https://sid.ir/paper/147901/en

    Vancouver: Copy

    Etminan m.r., JAFARI A., JALILI S., ZAHIRI J.. Study of Obstacle Oscillation in the Presence of a Fix Upstream Obstacle, Using a Physical Model. WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE)[Internet]. 2018;28(2 ):97-106. Available from: https://sid.ir/paper/147901/en

    IEEE: Copy

    m.r. Etminan, A. JAFARI, S. JALILI, and J. ZAHIRI, “Study of Obstacle Oscillation in the Presence of a Fix Upstream Obstacle, Using a Physical Model,” WATER AND SOIL SCIENCE (AGRICULTURAL SCIENCE), vol. 28, no. 2 , pp. 97–106, 2018, [Online]. Available: https://sid.ir/paper/147901/en

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