Hydraulic Study on the Rearing Facilities for the Spawn of Prawn，Penaeus Japonicus S_<PENCE> B_<ATE>

“くるまえび”の種苗育成施設に関する水理学的一考察

Hydraulic Study on the Rearing Facilities for the Spawn of Prawn，Penaeus Japonicus S_<PENCE> B_<ATE>

Creators Fujihara Teruo

In order to investigate the surface profile of supply waterway with close end and many orifices on both walls, the hydraulic test was carried out by the writer. The following results were obtained: 1) Total loss head △His △H=((f〓)/(12)・(l)/(R)+(Nf_1)/(4))(V^2_A)/(2g) where, R: hydraulic mcan radius, N: numbers of orifices, V_A: upstream velocity, f: ^1_<C_〓>^^12-1, C_〓: velocity coefficient, f: coefficient of fluid resistance. According to his culculation, △H is about 0.3^m/_m in this test case, and the surface profile is to be almost level. 2) Time to keep equilibrium (T) is T=(2・303Q・A)/(N^2・C^〓・α＾2・g) log_<10>√<H_m>/√<H^m-H>-√<2A>/√<N・C・a・√<2g>>√H where Q: discharge, A: surface area, C: discharge coefficient, ....

[ISSN]0513-1715

[NCID]AN00244250