fixed area nozzle 中文意思是什麼

fixed area nozzle 解釋
固定截面噴嘴
  • fixed : adj. 1. 固定的;確定的,不變的,固執的。2. 【化學】凝固的,不易揮發的。3. 〈美口〉(在經濟上)處境…的。4. 〈美俚〉(比賽等)通過作弊預先安排好結果的。
  • area : n. 1. 面積;平地;地面。2. 空地;〈英國〉地下室前的空地。3. 地區,地方;〈比喻〉區域;范圍。
  • nozzle : n. 管嘴;噴嘴;〈俚語〉鼻子。 a jet [propelling] nozzle 【火箭】尾噴管。
  1. 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:在固定二次噴管出口面積和氧燃比的條件下,二次流(引射空氣流)流量的增加引起混合氣體出口速度的下降和總流量的增加,二者綜合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,不必過分追求大的引射系數;兩種結構的性能對比分析表明了增壓比對引射火箭性能的提高具有重要意義;對引射火箭的熱力循環分析同樣表明,增壓比對于提高發動機性能非常關鍵。
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