00228567

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タイサ ボウジョ ニ カンスル ドシャ スイリガクテキ ケンキュウ ダイ7ホウ チンサチ ニオケル カドウカン ハイサコウ ノ スイリ ニ カンスル ジッケン カイセキ ノウギョウ セイサン コウガク

Psammo-Hydraulical Studies on the Control of Sediments (VII) : An Experiment and Analysis on the Hydraulic Problems of the Vortex Tube Sand Trap in the Sand Settling Basins

Japanese (日本語)

神戸大学農学部研究報告

13(1)

103-109

神戸大学農学部

1978

2006-09-15

本文ファイルは、国立情報学研究所CiNiiより提供されたものです。

Vortex tubes are special conduits having narrow slits along one-sided walls. Gravels and sands are sucked through these slits in to the conduits and discharge out of them by the spiral flow occurred in the conduits. What has been mentioned so far in this paper on vortex tube, a special pipe, will be summarized as follows. 1. From the preliminary experiment on the sand flushing tube without slit the value of friction factor as follows is calculated, λ_2=0.022. In the next place, by analyzing the experimental result of vortex tube, the values such as follows were considered to be appropriate. η=1.18 β=0.345(b/D)-0.004 where, ηis a coefficient larger than 1,and as it is to be afferent more or less by the shape of slit, it ought to determined experimentally. βis a function determined only by the form of the vortex tube, as defined as follows. β=√<2α/η>(b/A) 2. Velocity of inflow through slit, mean velocity in the tube and pressure head in the tube obtained by experiments are shown in Figs. 5,6,7,8,9,10,11,12 and 13 respectively. In Figs. 5,6,7,8,9,10,11,12 and 13,there are shown the calculated values of the first approximate solution for special case due to Araki's equations (12), (19) and (13). As seen in Figs. 5,6,7,8,9,10,11,12 and 13,experimental values and calculated ones agree favorably. 3. Vortex tube sand trap is effectively used for removing sediment from the sand settling basins in the head works. The authors earnestly hopes that such a vortex tube will be applied as much as possible in the future.

紀要論文