Imperial College London
Portrait Picture

Dr. Oliver Buxton

Faculty of Engineering, Department of Aeronautics

Reader in Experimental Fluid Mechanics
 
 
 
//

Contact

 

+44 (0)20 7594 5118o.buxton Website CV

 
 
//

Location

 

213City and Guilds BuildingSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Buxton:2023:10.1016/j.renene.2023.03.101,
author = {Buxton, O and Lingkan, E},
doi = {10.1016/j.renene.2023.03.101},
journal = {Renewable Energy},
pages = {1--9},
title = {An assessment of the scalings for the streamwise evolution of turbulent quantities in wakes produced by porous objects},
url = {http://dx.doi.org/10.1016/j.renene.2023.03.101},
volume = {209},
year = {2023}
}
Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Experimental results are presented for the evolution of three turbulent quantities in the wake of a porous object, analogous to a wind-turbine wake. These are the mean velocity deficit, the turbulence intensity, and the characteristic wake width. It is noted that characteristic wake widths can be defined both in terms of the mean velocity deficit profile and the profile of turbulence intensity. Both definitions of wake width are observed to grow linearly, although not at the same rate, with that defined by turbulence intensity growing more rapidly than velocity deficit. The streamwise scaling of both wake width, and velocity deficit is found to conform to a non-equilibrium dissipation scaling in which the dissipation rate within the wake is out of equilibrium with the inter-scale energy flux within the mean cascade of turbulent kinetic energy. The cumulative effect of turbulence intensity produced by Ν upstream porous objects is also considered. It is shown that when the object spacing is sufficiently large that the wake-added turbulence decays substantially only consideration of the most immediately upstream wake is important. Contrastingly, when the spacing between adjacent objects is small then summing the contributions from all upstream wakes in the array is necessary.
AU  - Buxton,O
AU  - Lingkan,E
DO  - 10.1016/j.renene.2023.03.101
EP  - 9
PY  - 2023///
SN  - 0960-1481
SP  - 1
TI  - An assessment of the scalings for the streamwise evolution of turbulent quantities in wakes produced by porous objects
T2  - Renewable Energy
UR  - http://dx.doi.org/10.1016/j.renene.2023.03.101
UR  - https://www.sciencedirect.com/science/article/pii/S0960148123004044
UR  - http://hdl.handle.net/10044/1/103596
VL  - 209
ER  -
Download