摘要
针对天然气开采现场及实际运行条件,设计加工了一套新型超音速脱水分离装置,装置中旋流产生器位于Laval喷管渐扩段之后并合理设计其形状尺寸。围绕改进后的超音速分离管进行了数值模拟和室内实验两方面的研究。建立了三维可压缩流体动力学模型,验证了其准确性,利用该模型对新型分离管进行了数值计算,结果表明:采用三维计算模型可以准确预测旋流器后置型超音速分离管的膨胀低温特性及高速旋流现象,尤其对激波位置和逆压强梯度的预测与热力学理论模型分析的结果吻合;通过实验测试了新装置的性能,实验结果验证了数值结果。对比原有分离管分离效果显示:新加工的分离管相对原有的超音速喷管在低压损比条件下可以获得更大的露点降。
According to the natural gas field and operational conditions, a new supersonic dehydration device was constructed. Swirler was critical part for the supersonic separator; its shape and dimension have a significant influence on the flow behavior. In the new device the swirler was located behind the Laval noz- zle section. Both numerical simulation and experiment study were carried out for the new device. A three- dimensional compressible fluid dynamic model was established to investigate the separation performance in the supersonic separator, The numerical results indicated that numerical model can accurately reproduce the adiabatic expansion characteristic and strong swirling phenomenon in the separator; especially the prediction of shock wave position and reverse pressure gradient were good agreement with the theoretical ones. In addi- tion, a pilot test facility also carried out to validate the numerical model. The experimental results shown that the new device could obtained bigger temperature drop than any other types at the same pressure loss ratio.
出处
《低温工程》
CAS
CSCD
北大核心
2014年第1期37-44,共8页
Cryogenics
基金
国家自然科学基金(批准号:50676002)
教育部高等学校博士学科点专项科研基金(批准号:20040005008)
关键词
旋流器后置型超音速分离管
数值模拟
流场特性
实验研究
压损比
露点降
swirler-baekplaced supersonic separator
numerical simulation
flow characteristic
experi-mental study
pressure loss ratio
dew-point depression
