超临界航空煤油喷射的射流结构及相变过程
Jet structures and phase transition process of supercritical aviation kerosene fuel injection
-
摘要: 研究了超临界RP-3航空煤油喷射到静止常温常压大气环境中的近场射流结构及喷口附近的射流相变过程.研究结果表明,超临界煤油喷射到静止大气环境中后会经历类似于理想气体不完全膨胀的过程,会在喷嘴下游产生马赫盘等激波结构,马赫盘的位置随喷射压力的提高而增大,而喷射温度对马赫盘位置几乎没有影响.当喷射温度较高时,超临界煤油在喷嘴出口处直接进入气相区,没有凝结现象发生.而煤油的喷射温度接近临界温度时,超临界煤油会在喷嘴内部及出口处发生局部凝结,进入气液两相区.Abstract: The injection of supercritical RP-3 aviation kerosene fuel into a quiescent atmospheric environment was experimentally investigated to study the jet structures and phase transition process near the nozzle exit.It was found that supercritical kerosene jets injected above the critical point underwent ideal-gas-like expansion and exhibited visible Mach disk shock structures.The axial location of the Mach disk increased with the injection pressure,and the injection temperature had little effects on the axial location of Mach disk.The phase transition process analysis revealed that the supercritical kerosene fuel was penetrated into the gas region from the supercritical region directly at the nozzle exit,without going through two-phase region at higher injection temperature.Fuel condensation phenomenon occurred in the nozzle and fuel entered two-phase region when fuel was injected near the critical point.
-
[1] Edwards T.USAF supercritical hydrocarbon huels inter-ests[R].AIAA Paper 93-0807. [2] 朱自强.超临界流体技术[M].北京:化学工业出版社,2000. [3] 韩布兴.超临界流体科学与技术[M].北京:化学工业出版社,2005. [4] Wu P K,Chen T H,Nejad A S,et al.Injection of super-critical ethylene innitrogen[J].Journal of Propulsion and Power,1996,12(4):770-777. [5] Wu P K,Shahnam M,Kirkendall K,et al.Expansion and mixing processes of underex panded supercritical fuel jets injected into superheated conditions[R].AIAA Paper 97-852. [6] Lin K C,Stouffer S C,Jackson T A.Structures and phase transition processes of supercritical methane/ethyl-ene mixtures in jected into a subcritical environment[J].Combust.Sci.and Tech.,2006,178:129-160. [7] Star A M,Edwards J R,Lin K C,et al.Numerical simu-lation of injection of supercritical ethylene into nitrogen[J].Journal of Propulsion and Power,2006,22(4):809-819. [8] Chen L D.Heat transfer,foulin g,and combustion of supercritical fuels[R].AFOSRTR-94-0321. [9] Crist S,Sherman P M,Glass D R.Study of the highly under expanded sonicjet[J].AIAA Journal,1966,4(1):68-71. [10] 范学军,俞刚.大庆RP-3航空煤油热物性分析[J].推进技术,2006,27(2):187 192 FAN Xuejun,YU Gang.A nalysis of thermophysical proper-ties of Daqing RP-3 aviation kerosene[J].Journal of Propulsion Technology,2006,27(2):187-192.(in Chinese) [11] 潘锦珊.气体动力学[M].北京:国防工业出版社,1989.
点击查看大图
计量
- 文章访问数: 1415
- HTML浏览量: 1
- PDF量: 570
- 被引次数: 0