起始流速 的英文怎麼說

中文拼音 [qǐshǐliúsù]
起始流速 英文
threshold unit
  • 起 : 起Ⅰ動詞1 （站起; 坐起） rise; get up; stand up 2 （取出; 取走） draw out; remove; extract; pull 3...
  • 始 : Ⅰ名詞1 （最初; 起頭） beginning; start 2 （姓氏） a surname Ⅱ動詞（開始） start; begin Ⅲ副詞[書面...
  • 流 : 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...
  • 速 : Ⅰ形容詞（迅速; 快） fast; rapid; quick; speedy Ⅱ名詞1 （速度） speed; velocity 2 （姓氏） a surna...
  • 起始 : origin; origination; parentage; germ; initiation
  • 流速 : [機械工程] velocity of flow; strength; [水文] current velocity; current speed; flow rate流速管 pi...
  1. As we know, inverse techniques make blade ' s profile well compatible with its surface velocity distribution, however, they give designers big challenges that the ideal velocity distribution is hard to obtained and sometimes the non - physical solution, such as double covering of flow field or unclosed profiles, would come out. the proposed design procedure in the paper has avoided the disadvantage mentioned above. in this paper, a quasi - irrotational equation is used to describe the flow in cascade instead of the generally used irrotational equation

    眾所周知，一般的反問題和混合問題的最大特點，是在給定的壓力面和吸力面上的壓力分佈或速度分佈條件下，直接得到葉片的幾何形狀，它可以使葉型型面與表面氣流參數有機結起來；其不足之處在於，對設計者而言，很難給定理想的葉片表面壓力分佈或速度分佈，並且有時會得到一個非物理解，如：得出的初始葉型可能會出現前緣、尾緣不封閉的現象。
  2. When flow velocity decreases below the corresponding incipient motion condition, no sediment movement occurs.

    當水流速度小於相應的起始運動時，將無泥沙運動。
  3. The experimental results showed that incipient boiling point decreased with increasing fluid subcooling and was independent of other factors, and that temperature overshoot enhanced with decreasing jet velocity and fluid subcooling

    結果表明：沸騰起始過熱度隨液體過冷度增加而減小，與其他因素無關，而溫度過頭值則隨射流速度和液體過冷度減小而增加。
  4. 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。
  5. Electrical field stress at the icicle tips is even stronger. at these areas, if the electric field across air gaps is high enough, corona discharges are initiated. this can lead to the development of local arcs across the air gaps causing a substantial increase in leakage current and a concomitant melting of ice

    空氣間隙的存在使覆冰絕緣子表面的電場分佈發生了明顯畸變，間隙上承受了非常高的電壓，這使得冰凌尖端的電場變得相當強，一旦電場達到了電暈的起始電場，局部放電就在這一區域發生，進而產生局部電弧並逐漸發展成整串的閃絡，泄漏電流迅速增大，同時伴隨著冰的融化。
  6. Many experiments on the effects with the change of several parameters, such as initial charging current, amplitude and frequency of positive pulses, variety of the amplitude of positive pulses among each charging stages, amplitude and duration of negative pulses, duration between positive and negative pulses, have been performed. the results of analysis and comparison of experimental data verify the validity and feasibility of the fast - charging method. on this basis, a new type of control strategy is advanced

    就充電過程中的起始充電電流、正脈沖的幅值、正脈沖的頻率、各充電級之間正脈沖幅值的變化幅度、負脈沖的幅值、負脈沖的持續時間、正負脈沖之間的停歇時間等幾個參數進行了大量的實驗，對實驗數據進行分析和比較，驗證了快速充電方法的有效性和可行性，在此基礎上提出了一種新型快速充電控制策略。
  7. But the agreement failed because of the opposition from manitoba and newfoundland. as soon as it failed, the conservatives in favour of quebec and western canada broke away from the core tory. in short, the failure of meech lake accord to get ratified directly led to the splitting of the conser - vative party

    協議的失敗又引起了魁北克和西部各省的強烈不滿，代表魁北克民族主義和西部地方主義的保守黨人對黨內主流派提出了強有力的挑戰，開始尋求建立代表法裔加拿大人利益和西部地方利益的新政黨，保守黨分裂的黨內派系基礎迅速形成，成為保守黨分裂的最直接原因。
  8. High - speed frame - synchronizer is an absolutely necessarily key device of the remote sensing satellite ' s ground - receiving system. it is mainly used to format the high - speed data stream, so that computer can get the beginning address of every frame of the high - speed data stream, and then data stream would be send to computer for pretreatment through high - speed interface

    高速幀同步格式化器是遙感衛星地面接收系統中必不可少的關鍵設備之一，主要將從衛星接收到的高速數碼流格式化，使計算機得以辨識每一幀的起始位置，然後將數碼流經高速介面進入計算機進行預處理。
  9. " speed camera vandalism is reaching epidemic proportions, and the only solution is to scrap cameras, " said paul smith, founder of safe speed campaign group which lobbies against the distinctive bright yellow devices

    一個名為安全車速運動組織的創始人保羅史密斯說： 「那種針對測速照相機的破壞行為正在變得日漸流行起來，而眼下惟一的解決方法就是將那些照相機全部拆除。 」
  10. Fluidized behaviors of ultra - fine powder caco3 of mean diameter 5 um in a spouted bed with a draft tube were investigated, studying the effects of geometry and operating parameters on the two - phase fluidized characters such as the initial spouted behavior, the solid circulation rate, the gas flow distribution in the spout and the annulus, and the solid flow in the annulus

    本研究以平均粒徑為5 m的caco _ 3超細粉為物料，對超細粉在導向管噴動床中的流化行為進行了系統的實驗研究，考察了床層結構和操作條件對起始噴動行為、固體循環速率、氣體在床層雙區中的分配以及固體顆粒在環隙區中的流動等氣固兩相流動特徵的影響。
  11. Meanwhile, considerable sum of transportation corporations, storage enterprises and shipping companies are taking on business of third party logistics, the distribution business is now flourishing, how to decrease distribution cost is concerned.

    與此同時，相當部分的大型運輸、倉儲和航運企業也開始朝向第三方物流經營。物流配送開始在我國迅速發展起來。如何在提高物流配送效率的同時降低成本成為一個重要的研究課題。
  12. The entry section of huning highway crosses the district, in correspondence with hujialiu highway in south - north direction ; the 204. 312 national highway, started from putuo district, reaches the changjiang drainage area, north - east and north - west areas ; the suzhou river within the district runs for 14 kilometers

    滬寧高速公路入城段橫貫區內，滬嘉瀏高速公路與之南北呼應， 204 . 312國道從普陀區起始可達長江流域和東北、西北地區，蘇州河流經14公里。
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