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Among the six types of simple pipe nets which we have previously treated, Type A_3 (Fig. 1) has a peculiar characteristics ; the flow in pipe line II may take a normal or reverse direction, according to the value of Reynolds number in the inflow pipe line and the length ratio l_<I/d> of pipe line I. We discovered these phenomena at first by experiments on a pipe net made of 10 mm glass tube (Fig. 6). Then we carried out another series of experiments on a wooden air-duct with a cross section of 8 cm square (Fig. 8), and could thereby determine the velocities of contra-flow in pipe line II. These have been compared with the results obtained by computations using the equations established by ourselves.
社団法人日本機械学会の論文
1952-08-20