機油粘度號數 的英文怎麼說

中文拼音 [yóuniánháoshǔ]
機油粘度號數 英文
oil viscosity rating
  • : machineengine
  • : Ⅰ名詞1 (脂肪; 油脂) oil; fat; grease 2 (姓氏) a surname Ⅱ動詞1 (用桐油、油漆等塗抹) apply t...
  • : 粘動詞(粘附) glue; stick; paste; adhere to; bond
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  • : 號Ⅰ名1 (名稱) name 2 (別號; 字) assumed name; alternative name3 (商店) business house 4 (...
  • : 數副詞(屢次) frequently; repeatedly
  • 機油 : engine oil; machine oil
  1. Based on prandtl ' s momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub - layer, buffer layer, and main turbulent stream for non - newtonian fluid flowing turbulently in ducts, which according to karman ' s three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non - newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate

    摘要以普蘭德動量傳遞理論為基礎,按照卡門的三層模型,通過室內模擬環道用0及加入減阻劑在圓管內的流動參的測定,計算了非牛頓型流體管內湍流邊界層的層流內層、過渡層、湍流中心的渦流,渦流與運動比、總應力隨相對位置的變化等定量參,探討了高分子減阻劑對非牛頓流體流動特性的影響,對湍流減阻現象的理與增大減阻率的條件進行了定量分析。
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