Empirical modeling of single-wake advection and expansion using full-scale pulsed lidar-based measurements

• DOI: 10.1002/we.1805
• Publication Date: 2014-09-02T04:07:55Z
• Authors: E. Machefaux; G. C. Larsen; N. Troldborg; M. Gaunaa; A. Rettenmeier
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

In the present paper, single-wake dynamics have been studied both experimentally and numerically. The use of pulsed lidar measurements allows for validation basic dynamic wake meandering modeling assumptions. Wake center tracking is used to estimate advection velocity obtain an expansion in a fixed frame reference. A comparison shows good agreement between measured average Computational Fluid Dynamics (CFD) large eddy simulation–actuator line computations. Frandsen's model seems predict fairly well far but lacks accuracy outer region near wake. An empirical relationship, relating maximum induction velocity, derived linked characteristics spherical vortex structure. Furthermore, new proposed based on initial pressure-driven flow regime spatial gradient computed from large-scale lateral velocities, thus inspired by assumption behind model. Copyright © 2014 John Wiley & Sons, Ltd.