Abstract
From the results of the previous report, it was found that the effect of orifices on pipe losses differs with the cases of L/D_0=1 and L/D_0≧2. Then, to obtain fundamental data on the uniform outflow from a perforated conduit or a slot, it is necessary to consider the two cases of L/D_0=1 and L/D_0≧2 separately. Therefore, this paper describes our experiments with four orifices drilled on lateral wall of pipe in the cases of L/D_0=1, 2, 3. Moreover, in the case of L/D_0=1 when five or six orifices are drilled in pipe it is experimentally tried to make clear how the number of orifices has an effect on stream. By means of measurement of the discharge volumes and pressure distributions, discharge volume rates and pipe losses were forecasted in the case of a perforated pipe.
