high-velocity drop 中文意思是什麼
high-velocity drop
解釋
大速度空投-
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。 -
A liquid drop removed from a sheet or jet may be exposed to the aerodynamic pressure effect of a high relative gas velocity.
離開液膜或射流的液滴，可能會受到高的相對速度氣體的氣動壓力影響。 -
We can discovered the factors which affected the monetary velocity of our country long - term drop include the economical monetization degree, the change of, interest rate, high savings ratio
研究結果表明影響中國貨幣流通速度長期下降的因素有經濟貨幣化程度的加深、利率的變動、居民的高儲蓄率。 -
The catalysts exhibited good adaptability to feedstock at high carbon space velocity, with higher conversion, little pressure drop over the bed, good tolerance to steam hydration, poisoning and coke formation, and good regeneratibility
結果表明，該催化劑對原料的適應性較強，使用空速高，轉化率高，床層阻力降小，抗蒸汽水合氧化能力、抗毒物能力和抗積炭能力較強，催化劑可還原再生，燒炭速率快。
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