Transient characteristics during pulse operation of liquid feed line for the attitude control rocket engine 姿控發(fā)動機脈沖工作的管路瞬變特性
Laser diode pumped solid - state laser ( dpssl ) is an important branch in laser field . continuous wave and pulse operation , q - switching and mode - locking operation have been achieved for dpssl which have a lot of uses in the field of medicine , process and so on Ld泵浦的全固態(tài)激光器( laserdiodepumpedsolid - statelaser或dpssl )是激光技術領域的一個重要分支,與傳統(tǒng)激光器相比在重量、體積、電?光轉換效率、使用壽命和穩(wěn)定性方面更具優(yōu)越性。
Water dielectric pulse power modulator has been widely applied because of its merits of high energy storage density , compactness , and capability to drive low impedance high power microwave sources . research for multi - pulse operation of high power spark gap switch with high current and comprehending its physical properties are the basis to study multi - pulse operation or repetitive operation of water dielectric pulse power modulator 水介質脈沖功率調制器具有儲能密度高,結構緊湊、與低阻抗微波源較好匹配的特點,因此得到廣泛的應用,但是受到高功率、大電流氣體開關的絕緣恢復的影響,水介質等低阻抗脈沖功率調制器的重復頻率運行或多脈沖運行受到較大的限制。
All analysis and simulations results indicate several methods improving the insulation recovery of spark gap switch : ( 1 ) using the gas with good thermal conductivity , such as h2 and sf6 ; ( 2 ) using the gas flow ; ( 3 ) utilizing the v / p cure ; ( 4 ) modifying the geometry and size of the electrode ; ( 5 ) using the gas with good electronegativity , such as sf6 . some experiments on the multi - pulse operation of high power spark gap switch are carried out . the insulation recoveries of switch without and with gas flow are both investigated 結合理論分析和模擬結果,提出了氣體火花開關多脈沖運行特性可采用如下方法: ( 1 )使用導熱性能好的氣體,如h2 、 sf6等; ( 2 )采用吹氣的方法; ( 3 )增大氣壓,在電極表面增加細小結構,構造平穩(wěn)的v / p曲線; ( 4 )改良開關電極結構和尺寸,采用奶頭-半球結構的電極; ( 5 )使用電負性強的氣體作為開關絕緣氣體,如sf6 。
The results provide a theoretic basis to research the multi - pulse operation of high power spark gap . as the breakdown mechanism is concerned , the influence of rough electrode on the v / p ( switch breakdown voltage / gas pressure ) curve is analyzed originally using breakdown possibility . the requirements of flat v / p curve are presented , which provides a theoretical basis for controlling and utilizing the curve 對氣體火花開關的擊穿機理,創(chuàng)新的利用擊穿概率分析了粗糙電極對氣體火花開關v / p曲線影響的物理機制,給出了利用細小結構構造平穩(wěn)v / p (開關擊穿電壓/氣體壓強)曲線的條件,為實驗中控制和利用該曲線提高氣體火花開關的多脈沖運行能力提供了理論基礎。