正排流量計 的英文怎麼說

中文拼音 [zhēngbèiliúliáng]
正排流量計 英文
positive-displacement meter
  • : 正名詞(正月) the first month of the lunar year; the first moon
  • : 排構詞成分。
  • : Ⅰ動1 (液體移動; 流動) flow 2 (移動不定) drift; move; wander 3 (流傳; 傳播) spread 4 (向壞...
  • : 量動1. (度量) measure 2. (估量) estimate; size up
  • : Ⅰ動詞1 (計算) count; compute; calculate; number 2 (設想; 打算) plan; plot Ⅱ名詞1 (測量或計算...
  • 流量 : rate of flow; flow; runoff; discharge; throughput; (flow) rate; quantity (of flow); flux
  1. 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式豎井泄洪洞應用於高水頭、大泄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、結合小灣工程導洞改建,對高水頭( 252m ) 、大泄( 1400m ~ 3 s )條件下旋式豎井中的水運動特徵進行了比較全面的測,包括空腔形態、徑向速分佈及井壁壓強等;二、提出了豎井空腔段螺旋水水力算方法,其算結果與實測值吻合良好;三、利用試驗與算結果,對旋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,歸納出豎井水總摻氣估算方法,為導氣方案的設提供了參考依據;六、在高水頭、大條件下,豎井空腔段下部速很高,盡管水螺旋運動引起的離心力可以確保井壁壓強保持壓,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。
  2. Xh rubber slowly - closing cut - off vavle is a new water supply and drainage vavle with full rubber structure, duck - mouthed appearance and functions or positive flow - in and reserve cut - off. according to thrust analysis and calculation as well as different operation mechanism and different rubber products by special processing. all will be open at weak hydraulic pressure is higher, the vavle gate will open more greatly and the water flow is greater. at reserve operation, the vavle gate closes naturally and seals tightly cut - off vavle ; the back pressure is higher, the vavle gate closes more tightly and the seal effect is better. it is used widely in various drainage exit to prevent from pouring backwards and flowing backwards in city planning, water conservancy and sewage disposal etc. it is the ideal productto replace flap vavle

    Xf型橡膠緩閉逆止閥是一種全橡膠結構外形呈「鴨嘴狀」 ,具有「入反向逆止」功能的新型給水閥門產品。它根據受力分析和受力算,針對不同的工況,採用不同的設機理,選用不同的橡膠配方,並按特殊工藝製作而成。向工作時,水由進水口入,微小的水壓,便能打開閥門,水壓越大,閥門開啟越大,水越大。
  3. Aimed at the feature of great fluctuation of water flow - rate in rivers and taking the monthly average flow - rate at low water with 90 % guaranty in recent ten years as design flow - rate, the permissible amount of major pollutants discharged into yellow river by lanzhou namely the stochastic environment capacity of waters, was determined by using a stochastic computation mode on the basis of lognormal distribution theory

    摘要針對河水變化大這一特點,採用以對數態分佈理論為指導的隨機算模式,以近十年90 %保證率最枯月平均為設,確定黃河蘭州段主要污染物的容許,即隨機水環境容
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