Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 07, 2019 - November 08, 2019
In order to hold two dimensional characteristic in a two dimensional bluff cylinder like a circular cylinder, providing an end plate in the end is known. However, since it strays off from the original purpose about change of the structure of the unification flow after passing over the end plate, it is not interested. So, the knowledge about influence which the magnitude of an end plate does to the magnitude of a bluff cylinder is hardly found. In this study, the flow which passes over a circular cylinder was divided by preparing a partition plate in the circular cylinder span central part. The vortex flow and unification flow visualization observation of each division were performed. The technique of visualization was carried out using a towing water tank by the pouring streak method. The flow velocity is v=0.057 m/s and the Reynolds number corresponding to it is Re=910. It was observed that two flows divided with the partition plate joined at the edge of a partition plate, and formed the complicated flow. Phase difference occurred in formation of the Karman vortex on the back side and the front side of the partition plate. The phase difference is considered depending on the length of the partition plate.
