抄録
Flow pattern on inside and opening region of an open cavity for the following shapes of an open cavity is experimentally studied by means of tracer technique in the range of Reynolds numbers from 2×10 3 to 6.0×10 4: the range of depth-to-width ratio H/L is from 0.2 to 3.0. Flow pattern inside an open cavity is significiantly influened both Reynolds number and the depth-to-width ratio of an open cavity. Flow pattern on an opening region of an open cavity in the range of Reynolds numbers from 1×10 4 to 6×10 4 is unsteady with chaotic movement of parts of fluid in different direction superimposed on the external main stream, that is to say, turbulent flow on the opening region of an open cavity is observed.
