Numerical simulation of natural gas flows in diffusers for supersonic separators
Numerical simulation of natural gas flows in diffusers for supersonic separators
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DOI：
10.1016/j.energy.2011.11.047
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发表时间：
2012
期刊：
影响因子：
9
通讯作者：
C. Wen;Xuewen Cao;Yan Yang;Wenlong Li
中科院分区：
文献类型：
--
作者：
C. Wen;Xuewen Cao;Yan Yang;Wenlong Li
扩散器在超音速分离器中起着将动能转化为压能的重要作用。采用雷诺应力模型，采用N-S方程对天然气在扩散器内的流动进行了数值计算。分析了激波和边界层条件下气体动力学参数的变化规律。结果表明，具有高压回收性能的锥形扩散器是超音速分离器的较好选择。激波是锥形扩散器中激波与边界层相互作用的结果，表现为分叉结构。当旋流进入扩散器时，旋流的强度改变了激波位置和静压。强烈的涡流导致激波前移，静压分布不均匀。
Diffusers play a vital role in the supersonic separator to convert kinetic energy into pressure energy. The natural gas flows in diffusers were numerically calculated using the navier-stokes equations with the RSM (reynolds stress model). The behavior of gas dynamic parameters was analyzed under conditions of shock waves and boundary layers. The results show that the conical diffuser with high pressure recovery performance is a good choice for the supersonic separator. The shock waves appear as bifurcation structures as a result of the interaction between the shocks and the boundary layer in the conical diffuser. When the swirling flow goes into the diffuser, the strength of the swirl changes the shock positions and the static pressure. The strong swirl results in the shift forward of the shock and the non-uniform distributions of the static pressure.