摘要
为了探究超音速天然气脱水装置螺旋导流器的最优叶片出口角,文中基于某天然气的实际组分,设计了超音速低温分离器的螺旋导流器,并利用FLUENT软件对其螺旋流发展段进行了模拟分析,将数值模拟结果与理论计算和同类设备进行性能对比,验证了其结构的合理性。分别对叶片出口角为20°,25°,30°,35°,40°螺旋导流器的模拟结果进行分析得出:出口角从20°增大至25°时,切向速度大幅度减小,继续增大,其值变化较小;不同出口角下,轴向速度基本不变,而径向速度变化较大,出口角30°时,径向速度波动最小,稳定性最高;通过比较动能与压降比值的差异,出口角25°—35°时,其值较好。综合来看,叶片出口角在30°左右其速度分布与压降损失最为合理。
To explore the optimum discharge blade angle of the swirl flow director in natural gas supersonic dehydration units, a swirl fluid distributor was firstly designed for the supersonic cryogenic separation device based on the actual composition of natural gas. The FLUENT software was then used to predict the evolution of the spiral fluid flow, and the numerical predictions incorporated with the theoretical results were compared to the performance parameters of the similar equipment. The coincidence of comparison verified the reasonability of the structure. Finally, the swirl flow directors with five different blade outlet angles 20°, 25°, 30°, 35°, 40° were simulated. The results showed that the tangential velocity decreased greatly with the outlet angle increasing from 20° to 25°, and the decreasing extent declined with the continue enlargement of the angle. With different outlet blade angles, the axial velocity behaved generally consistent and the radial velocity distributed with a large variation. The radial velocity fluctuated with the minimal magnitude and the highest stability when the outlet angle was 30°. The ratio of the kinetic energy to pressure drop was in the optimal range as the outlet angle remained from 25° to 35°. On basis of the aforementioned analysis, the velocity distribution and pressure loss were the most reasonable when the outlet blade angle was 30°.
作者
周驰
段振亚
张挺
范军领
刘新哲
刘永阵
贾文广
ZHOU Chi DUAN Zhen-ya ZHANG Ting FAN Jun-ling LIU Xin-zhe LIU Yong-zhen JIA Wen-guang(College of Electro-mechanic Engineering, Qingdao University of Science and Technology, Qingdao 266000, Shandong Province, China Leap ＆ Top Solution （Tianjin） Co., Ltd., Tianjin 300000, China)
出处
《化学工程》
CAS
CSCD
北大核心
2017年第4期63-67,73,共6页
Chemical Engineering(China)
基金
山东省高等学校科技计划项目(J16LB73
J15LC16)
关键词
天然气脱水
超音速低温
螺旋导流器
数值模拟
natural gas dehydration
supersonic cryogenic
spiral flow distributor
numerical simulation
