expansion-pressure ratio 中文意思是什麼

expansion-pressure ratio 解釋
膨脹比
  • expansion : n 1 張開，伸展。2 擴大；擴建；展開；發展。3 廣袤，遼闊。4 擴張物，擴大部分。5 （講題等的）詳述，...
  • pressure : n 1 壓；按；擠；榨。2 【物理學】壓力，壓強；大氣壓力；電壓。3 精神壓力，政治[經濟、輿論等]壓力。4...
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. Design optimization of chamber pressure and nozzle area expansion ratio of solid rocket motors

    固體火箭發動機燃燒室壓強及噴管擴張比優化設計
  2. And then, some improvements have been made on the old single tube pressure wave refrigerator experimental system. the experimental research, such as the ratio of gas charge time to gas exhaust time ( ), the frequency of the jet flow ( f ), the ratio of the expansion ( ), the length of the tube ( l ) and the heat transfer condition, has been carried out on the improved experimental system. the results were drawn as the following : the refrigerating efficiency will be heightened by augmenting when is in 0. 0405 to 0. 1842 ; the highest cooling efficiency will be

    實驗考察了有關因素對製冷效率和最佳射流頻率（ fopt ）的影響並進行了理論分析，結果表明，在= 0 . 0405 ~ 0 . 1842范圍內，製冷效率（ ）隨的增大而提高;隨射流頻率（ f ）的變化出現多個峰值，在本文實驗參數范圍內下，第二個峰值點的效率比第一個峰值點高;隨著膨脹比（ ）的增大，和fopt都略有增大，且低下的增幅比高下的大;強化管外換熱，可使fopt降低、明顯提高。
  3. Under a fixed bigger expansion ratio, the cooling performance of the vortex tube increases with the increase of the inlet pressure

    膨脹比為3時，進口壓力的增加基本不影響渦流管的製冷性能，而膨脹比為6時，隨著進口壓力的增加，渦流管的製冷性能顯著提高。
  4. The experiment results show that the cooling performance of the vortex tube keeps unchanged under a fixed lower expansion ratio, with the increase of the expansion ratio, the effect of the inlet pressure on the cooling performance of the vortex tube is becoming remarkable

    實驗結果表明：對于常溫渦流管，在較小的膨脹比下，進口壓力的改變對渦流管的製冷性能沒有顯著的影響；隨著膨脹比的增加，進口壓力的改變對渦流管製冷性能的影響也變得越來越顯著。
  5. The experimental results indicates that the secondary mass flow increases with increasing of primary mass flow rate, but the bypass decrease because the primary mass flow rate increase more rapidly than secondary mass flow. the expansion configuration shows low thrust property due to low pressure in flow path. the secondary nozzle changes the pressure distribution in ejector combustor, and decreases bypass ratio, but obtain more completely mixing

    結果表明：二次流流量隨著一次流流量的增加而增加，由於二次流流量的增加速度低於一次流，引射系數減小；在純擴張式結構實驗中，引射燃燒室壓強很低，難以實驗推力增強；二次噴管改變了引射燃燒室的壓強分佈，降低了引射系數，改善了混合狀況能；對于本文的實驗結構，存在一個最優的二次噴管出口面積，使引射火箭推力最大，同數值模擬結果相吻合。
  6. The large expansion ratio of liquid - to - gas can rapidly build pressure in systems where liquid can be trapped

    在液體受到束縛的系統里，液體到氣體的大膨脹率能夠迅速導致壓力積累。
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