新型超声速旋流分离器设计及数值模拟  

Structure design and numerical simulation of novel supersonic swirling separator

作　　者：文闯[1] 曹学文[1] 吴梁红[1] 

机构地区：[1]中国石油大学储运与建筑工程学院,山东青岛266555

出　　处：《中国石油大学学报（自然科学版）》2010年第4期119-122,126,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家高技术研究发展计划项目(2007AA09Z301);国家科技重大专项课题(2008ZX05017-004)

摘　　要：设计一种静态导向叶片安装在拉伐尔喷管之前，使流体经旋流后再进入拉伐尔喷管进行膨胀降温的新型超声速旋流分离器。新型超声速旋流分离器中气流的旋转发生在亚声速段，使得分离器内的激波更容易控制，降低能量损失，使液滴的再蒸发影响程度减小，从而提高分离器的分离性能及压力恢复能力。对新型超声速旋流分离器内流体的流动规律进行数值模拟研究。结果表明：随着升压比的增大，激波位置由扩压器向喷管方向移动，升压比控制在40％-73％内，超声速旋流分离器可正常工作；气流在拉伐尔喷管出口处形成低温、低压区，马赫数达到2．0，静温达-98．82℃，静压达82．945kPa；新型分离器内旋流场离心加速度可达243558g（g为重力加速度），能够实现良好的超声速气液旋流分离。The static guide vanes were installed at the entrance of Laval nozzle in the novel supersonic swirling separator. The natural gas was swirled when going through the vanes, and then expanded in the Laval nozzle. In this new separator, the shock waves could be easily restricted in the diffuser. The energy loss and the impact of re-evaporation could be reduced, which would improve the separation and pressure recovery performance. The flow law in the separator was obtained by numerical simulation. The results show that shock waves move to Laval nozzle from the diffuser with the increase of the relative pressure ratio, which is the ratio of the static pressure of the separator outlet to the inlet. When the relative pressure ratio is from 40% to 73%, the novel supersonic swirling separator can work. At the nozzle exit, the Mach number is 2. 0, resulting in lower temperature （-98. 82℃ ）and pressure （82. 945 kPa）. The maximal swirling acceleration is 243 558g （g is the acceleration of gravity）. The gas-liquid separation of supersonic gas can be realized well.

关 键 词：超声速 旋流分离器 升压比 激波 数值模拟 

分 类 号：TE868[石油与天然气工程—油气储运工程]