Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 11, 2020 - November 13, 2020
The fluid flow characteristics of offset jet are investigated experimentally. The offset jet is produced by the flow of air which issue from the end of a long parallel channel. The exit Reynolds number Re is changed in 2.0 ×103 to 7.0 ×103, and the offset ratio H/h (H : step height, h : channel height) is changed in 1.0, 2.0, 3.0, 4.0 and 5.0. When the position of the reattachment point is nondimensionalized by the step height, it moves to the upstream direction as the offset ratio increases in the laminar region. However, the reattachment length is approximately the same in the flow for H/h ≥ 2.0. The wall static pressure coefficient distributions and flow patterns change greatly between H/h =1.0 and H/h =2.0 in the laminar region, but those in the turbulent region hardly change even if the offset ratio is different.
