管線水頭損失 的英文怎麼說
中文拼音 [guǎnxiànshuǐtóusǔnshī]
管線水頭損失
英文
head loss of pipeline- 管 : Ⅰ名詞1 （管子） pipe; tube 2 （吹奏的樂器） wind musical instrument 3 （形狀似管的電器件） valve;...
- 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
- 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
- 損 : Ⅰ動詞1 （減少） decrease; lose 2 （損害） harm; damage 3 [方言] （用尖刻的話挖苦人） speak sarcas...
- 管線 : line pipe; lead-out管線安裝 pipelining; 管線泵 in-line pump; 管線測量 pipeline survey; 管線敷設 pipelining
- 水頭 : waterhead; head; flood peak水頭落差 head fall; 水頭坡降 water table gradient
- 損失 : 1. （失去） lose 2. （失去的東西） loss; wastage
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But now it ' s urgent to adopt new methods for calculating the head loss of regional drainage due to some factors such as long length, large flow quantity and probable strong topographic change
由於存在管線長、流量大以及區域地形變化幅度可能較大等因素，建設區域排水系統需要採用新的方法較為準確地計算水頭損失。Corresponding to the correct water hammer mathematic model ( 3 ), the character difference equation is by comparing the new mathematic model with the old mathematic model, the last calculative part of paper argues the falseness of the current water hammer mathematic model, makes use of the improved character line method to analyze the correct mathematic model ( 3 ), studies all kinds of facts " impact on water hammer pressure value and water hammer phenomenon attenuation, points out that, in the long pipeline system, the subarea calculation of head loss along with flow rather influences the calculative results of water hammer pressure, advices to take the subarea calculation of head loss along with flow into account in the water hammer calculation of the long pipeline system
對應于正確的水擊數學模型（ 3 ）的特徵差分方程形式如下c ，弓+吼川一c ，唱一幾弓扮幾rv另卜川= o幾代+吼川一幾唱一吼嶸{一c :腳丸}唱} ? 「本論文在最後的計算部分，通過對新老數學模型的數值計算比較，進一步論證了當前水擊數學模型的不正確性。並且應用改善了的特徵線法對正確的數學模型（ 3 ）進行了計算分析，研究了各種因素對水擊壓強值和水擊現象衰減的影響，指出在長管道系統中，沿程水頭損失的分區計算對水擊壓強的計算結果影響較大，建議在長管道系統的水擊計算中應按分區進行沿程水頭損失的計算。In this article, through lab and engineering site trials that the physical data of new type pipe materials is corrected, the results are as follow : ( l ) the expansion coefficient of new plastic pipe materials is more large than that of iron pipe. ( 2 ) new plastic pipe materials have different heat - resisting character and according to the water temperature to choose pipe materials ; ( 3 ) the loss of head of water for new type pipe materials is more smaller than iron pipe and also correct the loss of head of water that calculated by theory ; ( 4 ) probing into the press - resistance character of new plastic pipe materials
本文通過試驗室試驗及工程現場試驗，對新型給排水管材的幾個重要的物理性能參數進行實驗測定，糾正了以往的錯誤認識。研究結果表明： （ 1 ）新型塑料管材線脹系數遠遠大於鋼管和鑄鐵管，設計和施工中要嚴格考慮管道的伸縮； （ 2 ）新型塑料管材耐高溫性能各不相同，需根據管內水溫選定管材； （ 3 ）新型管材水頭損失遠小於鋼管，並對原水頭損失計算公式進行了修正； （ 4 ）對于塑料管材的耐壓性能進行了探討。
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