The invention provides a three-mode rotating support operating under an
electric arc wind tunnel condition and a using method thereof. The three-mode rotating support comprises a
rotating disc, a rotating shaft, an electric
rotating disc, an electric push-pull rod, a model support, a push-pull sliding ring and a supporting rod. The outer ring of the rotating disk is provided with three uniformly distributed mounting sheets, and each mounting sheet is provided with a model support through a rotating shaft. The electric
rotating disc drives the rotating shaft and the rotating disc to rotate integrally, and
sequential switching of the three models at the arc wind tunnel
nozzle outlet checking
station is achieved. The electric push-pull rod drives the push-pull
slip ring to move axially and converts
linear motion into pitching rotation of the model support through the supporting rod, so that the
attack angle of the model is adjusted in real time during examination. According to the invention, continuous examination of three models can be completed in one vacuum-pumping period, dynamic change of the
angle of attack in the test process is supported, and the efficiency and the
data acquisition capability of the arc wind tunnel test are greatly improved.