water drop test 中文意思是什麼
water drop test
解釋
水滴試驗-
Test method for interfacial tension of electrical insulating oils of petroleum origin against water by the drop - weight method
滴重法測定石油制電絕緣油耐水界面張力的試驗方法 -
In this thesis hydraulic experimental studies and theoretical analyses on the vortex - flow drop shaft were conduced and the following results were accomplished : ( 1 ) in the model test some hydraulic characteristics including the shape of air core in the center of the drop shaft, the radial distribution of water flow velocity and the distribution of pressure on the wall of the drop shaft were measured under the condition of high water head above 250m and large discharge above 1400m3 / s. ( 2 ) a kind of computational method for the spiral water flow in the air core region of drop shaft was discussed and applied and the results agree the experimental data well. ( 3 ) the total ratio of energy dissipation in the drop shaft can reach 90 % and the energy dissipation in every region was discussed quantitatively
本文通過試驗研究與理論分析對旋流式豎井泄洪洞應用於高水頭、大泄流量情況時存在的一些水力學問題進行了研究和探討，取得以下主要成果：一、結合小灣工程導流洞改建，對高水頭（ 252m ） 、大泄流量（ 1400m ~ 3 s ）條件下旋流式豎井中的水流運動特徵進行了比較全面的測量，包括空腔形態、徑向流速分佈及井壁壓強等；二、提出了豎井空腔段螺旋水流水力計算方法，其計算結果與實測值吻合良好；三、利用試驗與計算結果，對旋流式豎井的消能機理進行了探討，對豎井各部分的消能能力有了總體認識；四、對豎井下部消力井的合理井深進行了優化試驗研究，發現消力井合理深度為0 . 9d左右；五、通過試驗研究，歸納出豎井水流總摻氣量估算方法，為導流洞排氣方案的設計提供了參考依據；六、在高水頭、大流量條件下，豎井空腔段下部流速很高，盡管水流螺旋運動引起的離心力可以確保井壁壓強保持正壓，但空化數依然較低，因此豎井的空化空蝕始終是工程界關注的重大問題。 -
Connecting to the model test, some suggestions, important for design, are put foward, for example, the chute width of intermediate outlet should be constant ; the optimum height difference of drop between intermediate outlet and surface outlet should be larger than the water depth at intermediate outlet ; and the type of drop should be changed with the characteristics of certain project
結合試驗結果，提出中孔泄槽以等寬或微收縮為宜、表中孔最優坎高差應大於中孔水流的主流水深、跌坎形式的選擇應結合具體工程特點等建議。 -
Until now, there have been a few reports on the damage of the water pumps caused by sand and water cavitation. by use of the test loop for solid and liquid two phases, under the condition of 3 % head drop, the damage location and relative degree of the sand and water cavitaiton occurred on the impeller were tested and researched. the result was, them, compared with the results under the condition that water cavitation occurred and no cavitation but only wear occurred. the differencts were analyzed. the analysis result can be used as the basis of the further research and the improvement of the impeller shape
目前含沙水汽蝕對水泵損傷方面的報導甚少，本文利用固液兩相流試驗臺，對離心泵閉式葉輪在含沙水汽蝕時（ 3揚程下降點）的損傷部位和相對程度進行了試驗研究，並將此結果與清水介質發生汽蝕時的損傷情況[ 13 ]及含沙水無汽蝕情況下的磨損情況[ 7 ]相比較，對其差異進行了分析，為今後進一步探討葉輪損傷機理和葉型改進提供了實驗依據。 -
Requirement : supply pressure drop must be 1. 0 psid or more when water flow stops from test cock no. 2
要求：當水流從測試旋塞2號上停止時，供應壓降必須在1 . 0psid及以上。 -
The relationship of chloride ions diffusion coefficient with time conforms to power function according to chloride ions " content in each layer of different concrete. based on the relationship, a mathematical model equation of chloride ions diffusion in concrete was deduced as follow : test results show that chloride ions diffusion coefficient decreases with the water / binder ratio reducing. when fly ash or slag is properly blended, chloride ions diffusion coefficient will also drop
通過取樣測得不同技術條件混凝土各層氯離子含量，得到氯離子擴散系數與時間成冪函數關系，據此推出氯離子在混凝土中擴散的數學模型式為：試驗結果表明，氯離子的擴散系數隨著水膠比的減小而降低，適當地摻入粉煤灰或礦渣粉可以有效地降低氯離子的擴散系數。
分享友人