Experimental study of Counter-Rotating Vortex Pair Trajectories induced by a Round Jet in Cross-Flow at Low Velocity Ratios
| Autor: | Cambonie, T., Gautier, N., Aider, J. -L. |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Exp Fluids (2013) 54:1-13 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1007/s00348-013-1475-9 |
| Popis: | Circular flush Jets In Cross-Flow were experimentally studied in a water tunnel using Volumetric Particle Tracking Velocimetry, for a range of jet to cross-flow velocity ratios, r, from 0.5 to 3, jet exit diameters $d$ from 0.8 cm to 1 cm and cross-flow boundary layer thickness delta from 1 to 2.5 cm. The analysis of the 3D mean velocity fields allows for the definition, computation and study of Counter-rotating Vortex Pair trajectories. The influences of r, d and delta were investigated. A new scaling based on momentum ratio r_m taking into account jet and cross-flow momentum distributions is introduced based on the analysis of jet trajectories published in the literature. Using a rigorous scaling quality factor Q to quantify how well a given scaling successfully collapses trajectories, we show that the proposed scaling also improves the collapse of CVP trajectories, leading to a final scaling law for these trajectories. Comment: Published in Experiments in fluids. The original publication is available at htto://.springerlink.com |
| Databáze: | arXiv |
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