基于激光吸收光谱技术的PDE管内燃气测试  

Exhaust diagnostics in PDE tube based on absorption spectrum technology

作　　者：吕晓静 李宁[2] 翁春生[2] LV Xiaojing;LI Ning;WENG Chunsheng(Aircraft Maintenance Engineering College,Guangzhou Civil Aviation College,Guangzhou 510403,China;National Key Lab of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]广州民航职业技术学院飞机维修工程学院,广州510403 [2]南京理工大学,瞬态物理国家重点实验室,南京210094

出　　处：《激光杂志》2018年第10期137-142,共6页Laser Journal

基　　金：国家自然科学基金(No.11372141);广东省普通高校青年创新人才项目(NO.2017Gk QNCX001);广东省高等教育学会高等教育科学研究“十三五”规划课题(No.16GYB06)

摘　　要：脉冲爆轰发动机（PDE）是通过爆轰产生动力的新型发动机。对其工作循环中的燃气变化进行测量,进一步分析PDE的工作状态,能够提高PDE的工作效率。采用波分复用技术,搭建了光纤分布式测量系统,对PDE完整工作循环中管内不同位置处温度和燃气组分H2O浓度进行了测试与分析,结合燃烧转爆轰、爆轰波后燃气喷射、爆轰燃烧废气排空和填充进程各个不同阶段对温度及H2O浓度变化特征及原因进行了分析。实验分析填充系数对PDE稳定爆轰形成的影响。实验结果表明,在填充系数不低于84%时,PDE管内方可出现爆轰。Pulsed detonation engine（ PDE） exhaust diagnostics in a working cycle is accomplished based on absorption spectrum technology. A distributed optical fiber measurement system is built by using the wavelength division multiplexing technology. The temperature and H2 O concentration during the whole working cycle were tested and analyzed in different positions in the tube. Combined with different stages,such as deflagration to detonation Transition,exhaust injection after detonation,exhaust evacuation and filling process,characteristics and trend of temperature and H2 O concentration curve is analyzed. The influence of PDE fill factor on detonation pressure of PDE was studied. The influence of fill factor on detonation pressure of PDE was also studied. The experimental results show that stable detonation can form under the filling factor of more than 84%.

关 键 词：吸收光谱技术 PDE 燃气测试 填充系数 

分 类 号：O433.1[机械工程—光学工程]