Wake interaction of aligned wind turbines over two-dimensional hills

Diego Siguenza-Alvarado, Venkatesh Pulletikurthi, Jhon J. Quinones, Clarice Nelson, Shyuan Cheng, Ali Doosttalab, Leonardo P. Chamorro, Luciano Castillo

Research output: Contribution to journalArticlepeer-review


An experimental investigation was carried out to explore the interaction and wake statistics of model wind turbines operating individually and in pairs over two-dimensional hills with varying heights. The hills shared a sinusoidal shape and extended L / D = 20 in the streamwise direction, where D represents the diameter of the turbine rotor. The peak heights of the hills were H / D = 0 , 0.5, 1, and 1.5. The first turbine was located at the beginning of the hill development, and the second turbine was positioned halfway between the first and the hill's peak, downwind. The flow in the intermediate wake regions was characterized using particle image velocimetry, focusing on the recovery mechanisms of streamwise momentum on the windward side of the hills, ranging from gentle to steep-up slopes. The results indicate that the advection terms play a more significant role than turbulence in the wake recovery mechanism with steeper hill slopes. Associated reduced turbulence levels are attributed to flow acceleration, which led to a higher power availability at the top of the hills.

Original languageEnglish (US)
Article number105142
JournalPhysics of fluids
Issue number10
StatePublished - Oct 1 2023
Externally publishedYes

ASJC Scopus subject areas

  • Computational Mechanics
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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