Acta Mechanica Slovaca 2019, 23(1):56-60 | DOI: 10.21496/ams.2019.006
Study of the Effect of Turbulence on Cooling Tower Wakes
- 1 Aerospace Research Centre, Aerodynamics Department, Beranových 130, 19905 Prague, Czech Republic
- 2 Czech Technical University in Prague, Department of Fluid Dynamics and Thermodynamics, Technická 4, 16607 Prague, Czech Republic
A subject of an experimental fluid mechanics task was measurement of flow around hyperboloid-shaped cooling tower. Experimental part was provided by means of 2D Particle Image Velocimetry (PIV). The contribution contains results from PIV measurements in a range of Reynolds numbers varying from 43000 up to 53000. The tunnels used for the measurement were two different types: Low Speed Wind Tunnel of Eiffel type (LSWT) with low rate of turbulence intensity and Boundary Layer Wind Tunnel (BLWT) with high rate of turbulence intensity.
Keywords: mechanics of fluids, flow around a bluff body, Particle Image Velocimetry, cooling towers.
Published: March 29, 2019 Show citation
References
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- Conclusion
- The model of hyperboloid-shaped cooling tower was measured by means of Particle Image Velocimetry in two types of wind tunnels. One tunnel had the modelled turbulent boundary layer so the model was sunk in it, the second tunnel´s turbulence intensity was under 1%. The main intention of this contribution was to show the influence of turbulence intensity on the wake. The vector velocity fields in the planes parallel and perpendicular to the ground were measured and evaluated to show this phenomenon.From the planes perpendicular to the ground, the x-component of velocity was calculated and clearly proved the difference between the wakes. The turbulent boundary layer supresses the wake and velocities in the x-direction were as follows: the recirculating area for the wake in the BLWT is lot shorter and also the velocity x-component is smaller.
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