77th Annual Meeting of the APS Division of Fluid Dynamics (November 24, 2024 — November 26, 2024)

V2694935: 'Updraft': Dynamically Generating Plumes on Fan-Array Wind Tunnels for Autonomous Flight Research

Authors
  • Alejandro Stefan-Zavala, Caltech
  • Julian Humml, Caltech
  • Xiaozhou Fan, Caltech
  • Morteza Gharib, Caltech
DOI: https://doi.org/10.1103/APS.DFD.2024.GFM.V2694935

Fan-array wind tunnels are grids of individually controllable fans. This architecture is especially well-suited to replicate the turbulent, dynamic, non-uniform flow conditions found in low-altitude flight. In this video, we use an 3 meter by 3 meter array of 2,592 fans, blowing upwards, to produce updrafts. By modulating fan units, the location, speed and presence of these updrafts or 'plumes' is controlled dynamically. These dynamic updrafts produce realistic, challenging conditions for autonomous flight research.

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