Abstract
Flow characteristics in vicinity of six circular cylinders aligned inline was investigated experimentally by means of PIV method. Experiments were conducted in a low speed closed circuit wind tunnel. Inflow velocity was 1.2 m/s which corresponds to Re=1600 based on the cylinder diameter. Spacing ratio between cylinders L/D was 1.5. Instantaneous and averaged velocity fields were presented. Experiments were designed in order to use their results as a test case for future numerical calculations.
Highlights
Fluid flow around cylinders is subject of interest theoretical and applied investigations
Airflows in mining excavations are disturbed by presence of various devices
Studies of flow around six cylinders are mostly based on CFD calculations and only for low Reynolds numbers
Summary
Fluid flow around cylinders is subject of interest theoretical and applied investigations. One of the components of support roof system are legs which are approximately cylindershaped and distributed inline. This configuration may be considered as flow through multiple cylinders. Effect of gap spacing on vortex shedding of laminar flow past six cylinders arranged in-line are studied by [4] and [5]. They found a flow pattern transition between spacing ratios 3.6 and 4 when drag and lift coefficients change significantly. Studies of flow around six cylinders are mostly based on CFD calculations and only for low Reynolds numbers. Experimental results of turbulent airflow through six cylinders presented in this paper can be used as a benchmark for future CFD validation
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