混合二重積分 的英文怎麼說

中文拼音 [húnèrzhòngfēn]
混合二重積分 英文
mixed double integral
  • : 混形容詞1. (渾濁) muddy; turbid2. (糊塗; 不明事理) foolish; stupid
  • : 合量詞(容量單位) ge, a unit of dry measure for grain (=1 decilitre)
  • : Ⅰ數詞(一加一后所得) two Ⅱ形容詞(兩樣) different
  • : 重Ⅰ名詞(重量; 分量) weight Ⅱ動詞(重視) lay [place put] stress on; place value upon; attach im...
  • : Ⅰ動詞(積累) amass; store up; accumulate Ⅱ形容詞(長時間積累下來的) long standing; long pending...
  • : 分Ⅰ名詞1. (成分) component 2. (職責和權利的限度) what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] (料想) judge
  • 混合 : (攙雜在一起) mix; blend; mingle; admix; mixture; mix up; interfusion; commixture; blending; cre...
  • 積分 : 1. [數學] integral; integrate; integration 2. [體育] (積累的分數) accumulate points
  1. The bump height and secondary wall - impingement distance were discovered to play an important role in producing a secondary space jet, reducing the quantity of fuel stuck on the wall and forming lean mixture, and their suitable values being 1. 0 - 1. 5mm and 0 - 2. 0mm respectively

    發現bump高度及次撞壁距離對撞壁油束形成次空間射流、減少壁面燃油堆以及形成稀氣有要作用,且發現bump的高度和次撞壁距離別為1 . 0 1 . 5mm和0 2 . 0mm比較適。
  2. It is shown that when the exit area of secondary nozzle and the fuel / oxidizer ratio is fixed, the increase of mass flow rate of secondary flow lead to the decrease of velocity of mixed flow, and increase of total mass flow rate. the synthetical result of these two phenomenon cause the increase of thrust of rocket ejector, but the increasing magnitude is relatively small, indicating that these is no necessary to claim large bypass ratio in rocket ejector design. in the comparison between two configurations, the typical one has better performance, indicating the importance of pressure ratio

    結果表明:在固定次噴管出口面和氧燃比的條件下,次流(引射空氣流)流量的增加引起氣體出口速度的下降和總流量的增加,者綜作用使發動機推力增加,但增幅不大,表明在設計發動機結構和工作參數時,不必過追求大的引射系數;兩種結構的性能對比析表明了增壓比對引射火箭性能的提高具有要意義;對引射火箭的熱力循環析同樣表明,增壓比對于提高發動機性能非常關鍵。
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