尾流束 的英文怎麼說
中文拼音 [wěiliúshù]
尾流束
英文
outflow jet-
The wakefield excited by an ultrashort and ultrahigh laser pulse propagating through tenuous plasma can accelerate electrons to extreme high energy. this can be used as a mechanism to design minitype electron accelerator. this thesis is devoted to studying those issues relevant to the wakefield accelerator, namely the laser wakefield accelerator ( lwfa ), laser wakefield accelerator driven by multiple pulses ( mp - lwfa ), plasma beat wave accel - erator ( pbwa ) and self - modulated laser wakefield accelerator ( sm - lwfa )
本文的目的是:利用粒子模擬方法,研究和比較激光尾流場加速電子的四種主要方案:短脈沖激光尾流場加速( lwfa ) 、多脈沖激光尾流場加速( mp - lwfa ) 、拍頻束尾流場加速( pbwa ) 、自調制激光尾流場加速( sm - lwfa ) 。At the preliminary stage of burning the gas flows along the back surface of the submerged nozzle and no recirculation forms in the aft - end cavity. at the medium stage of burning a weak recirculation forms in the rear of aft - end cavity by the force of injection flow. at the end stage of burning the flow separates at the c ombustion channel and a strong vortex forms in the aft - end cavity
實驗結果表明,在發動機工作過程中隨著燃面的退移,燃燒室尾部的流動會發生很大變化,初始時刻背壁區加質流沿噴管背壁進入噴管,背壁區沒有迴流形成;中間時刻在加質流的驅動下背壁區後部形成較弱的迴流;結束時刻氣流在燃燒室壁面分離,背壁區形成強烈的迴流。
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