secondary engine 中文意思是什麼
secondary engine
解釋
輔助發動機-
The nozzle flow is composed of the main gas stream and the secondary air stream in order to simulate the nozzle of turbofan engine
噴管中的氣流由主流燃氣和次流空氣組成，用以模擬渦扇發動機的噴管。 -
Four conclusions were obtained : 1 ) the ideal maximum performance of rbcc engine is basically determined by the match of rbcc " s basic operating parameters such as the ratios of primary / secondary mass flow rate, total pressure, total temperature and the ratio of overall oxidant / fuel mass flow rate, etc
主要獲得如下結論： 1 ）基本工作參數的匹配，如引射比、總壓比、總溫比，決定了引射發動機最大可能獲得的性能。 -
But the real performance can be obtained is mainly determined by the ejected secondary mass flow rate, the mixing degree, the mixing efficiency, and the secondary combustion efficiency can be obtained. 2 ) the ejected secondary mass flow rate, the mixing degree and the mixing efficiency are synthetically affected by the configuration of rbcc engine, especially the mixer and the primary nozzle, in which the primary nozzle, including shape, number and distribution mainly determines the mixing degree ; while the mixer configuration primarily determines the mixing efficiency
而實際能達到的性能則取決于實際的引射比及兩種流體的實際摻混程度、摻混效率和二次燃燒效率； 2 ）引射發動機的構型，包括后體及一次流噴管的形狀、數量、配置等，對引射進來的二次流量、一次流和二次流之間的摻混程度和摻混效率起著主要作用。 -
The main results are : supersonic region and subsonic region can co - exist in flow path simultaneously, subsonic flow is insignificance for engine performance ; total pressure of primary rocket should be decreased when mach number is increased. in the experimental aspect, some components of ejectorjet experimental system were improved, ejectorjet experiments using alcohol as secondary fuel were conducted
由數值計算獲得的結論為：引射火箭內的一般流態為超音速區與亞音速區共存，亞音速區不具備做功能力；飛行馬赫數增大，引射火箭內更易於產生壅塞；為了獲得最佳的性能，隨著飛行馬赫數的提高，應當降低一次火箭的工作壓強。 -
Secondary means of starting the engine
第二種起動方式。
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