CAJ | 학술논문

为了研究直排型连续波DF/HF化学激光器的启动特性,建立了一套化学激光器气流通道双喷管小型实验模型.以氮和氦作为引射介质,采用两种面积比的引射喷管,进行了启动实验.实验表明,当以氮作为引射介质,采用大面积比的引射喷管进行实验时,实验数据与1维理论计算结果相差很大.分析认为,该次实验中,在引射喷管内剧烈地膨胀后,部分N_2已经发生相变,理论计算采用的1维定常流处理法已经不再适用.计算表明,连续波DF/HF化学激光器中的光腔燃料和副稀释剂He不会发生相变,但当以N_2作副稀释剂时,副稀释剂喷管面积比不能过大.
위료연구직배형련속파DF/HF화학격광기적계동특성,건립료일투화학격광기기류통도쌍분관소형실험모형.이담화양작위인사개질,채용량충면적비적인사분관,진행료계동실험.실험표명,당이담작위인사개질,채용대면적비적인사분관진행실험시,실험수거여1유이론계산결과상차흔대.분석인위,해차실험중,재인사분관내극렬지팽창후,부분N_2이경발생상변,이론계산채용적1유정상류처리법이경불재괄용.계산표명,련속파DF/HF화학격광기중적광강연료화부희석제He불회발생상변,단당이N_2작부희석제시,부희석제분관면적비불능과대.
To study the starting characteristic of directly drained CW DF/HF chemical laser (DDCL), a double-nozzle small-scale model of DDCL gas channel was set up, and a series of experiments without secondary flow was conducted with nitrogen and helium as primary flow respectively. The data of experiment, which is conducted with nitrogen and primary nozzles of large area ratio, are far away from the theoretical result. It is believed that, a part of nitrogen has phase transition while it is expanding in the experiment, and then the one-dimension treatment is out of place. In addition, the states of cavity fuels and secondary diluent helium will not change in a CW DF/HF chemical laser, but the area ratio of secondary diluent nozzle must not be very large if the secondary diluent is nitrogen.