WIND FLOW VISUALIZING METHOD FOR EXPERIMENTAL WIND TUNNEL

摘要

PURPOSE:To facilitate handling, to improve safety, and to allow an increase in size by injecting visualized steam which is obtained by passing steam generated by a steam generator through a rapid cooling means from a nozzle in a wind tunnel. CONSTITUTION:Water 1 supplied into the steam generator 4 is heated by a throw-in heater 7. The generated steam reaches a white steam generator 14 from the upper part of the generator 4 through a communicating pipe 15. Dry ice pieces are charged in the generator 14 and the steam 2 rise among heaped dry ice pieces A and have its heat absorbed by the sublimation latent heat of the dry ice A simultaneously, so that the steam is visualized into a particulate shape. The white steam 3 in the visualized state is injected into the duct in a blade type body from the upper part of the generator 14 and spouted from its nozzle as an atomized air flow. In this case, air from a fan enters a laminar air state from the front edge of a blade type to the rear end and flows backward along the surface of an experimental body as a laminar air flow parallel to the visualized atomized air flow. Simultaneously, the visualized atomized air flow attenuates in its state by constant distance and is scattered in air eventually and vanished like mist.