expansion nozzle 中文意思是什麼
expansion nozzle
解釋
擴散形噴管-
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 -
The paper calculates and analyzes the influences of the initial pressure, the volume of the expansion chamber, and the throat diameter of the nozzle on the non - loaded performance of the circuit breaker, and presents the variation of the state parameters of the expansion volume and the flow field during interruption period, also predicts the nature of the self - extinguishing circuit breaker
本文分析計算了起始壓力、膨脹室體積及噴口喉部直徑的變化對斷路器空載特性的影響，給出了斷路器膨脹室狀態參數及滅弧室內氣流場在斷路器開斷過程中的變化，得到了自能式sf _ 6斷路器固有的特性。 -
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。
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