Abstract

A technique for monitoring strong vortex wind fields is highly desired due to the rapid development of global warming. Vortex wind velocity imaging using an acoustic travel time tomography technique was developed to meet this need. The method can be implemented with a small number of parallel facing pairs of acoustic transmitters/receivers from just a single illumination view direction, so that high-speed data acquisition compatible with instantaneous wind-flow imaging was accomplished. A test using an indoor wind velocity tomography system demonstrated that vortex wind velocity profiles generated by an electric fan could be instantaneously reconstructed with satisfactory quantitative precision.

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