| 摘要 |
PURPOSE:To observe the flow around the body of a model in details from the extreme proximiy thereto with good accuracy without giving any influence upon said flow at all by constituting at least a part in the submerged part of the body of the model of a wall body having inside and outside transparency. CONSTITUTION:8 is the circumferential wall in an observing part in a circulating water tank and windows 9... for observation are provided on both side parts and bottom part thereof. A model ship 1 is fixed afloat in a prescribed testing state on the water surface in approximately the central part in the transverse direction in the observing part of this circulating water tank and the water is circulated in the water tank at prescribed velocity of flow. On the other hand, light is irradiated around the submerged part of the ship 1 by lights 10... through said windows 9.... In this state, colored ink 11 is run out through the small holes 4... around the hull of said ship to visualize the flow around the stern. The flow is observed visually from the inside of the transparent stern 2 of the ship 1 and the flow is photographed by an implement 12 for observation, for example, an 8-mm. camera or the like. |
