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Structure improvements and numerical simulation of supersonic separators with diversion cone for separation and purification

机译：带有分离锥的导流锥超音速分离器的结构改进与数值模拟。

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In the improved supersonic separator with the diversion cone, the reflow channel and the flush-type drain structure are adopted to overcome two shortcomings: the shock wave that easily appears in the diverging section of the nozzle and the swirling flow that occurs in subsonic conditions with poor efficiency, which makes the low-temperature section short and the cooling effect unsatisfactory. In this study, the distribution of the main parameters and the effects of the inlet temperature and outlet angle of the swirler were investigated by numerical simulation. The results indicated that the internal extension structure severely damaged the supersonic flow in the nozzle, while the flush type drainage port slightly influenced the fluid. The smaller outlet angle of the drainage port reduced its effect on the supersonic flow. Moreover, the improved device with the reflow enlarges the supersonic region and exhibits the better performance. In addition, it achieves a low temperature (221 K) and high centrifugal acceleration (2.2 × 10 ~(7) m s ~(?2) ). Moreover, the inlet temperature of 300–320 K and the outlet angle of 50°–60° are recommended for the improved supersonic separator based on the comprehensive consideration of good expansion characteristics and centrifugal separation performance.
机译：在改进的带有分流锥的超音速分离器中，采用了回流通道和冲洗式排水结构来克服两个缺点：在喷嘴的发散段中容易出现的冲击波和在亚音速条件下产生的涡流。效率差，使低温段短并且冷却效果不令人满意。本研究通过数值模拟研究了旋流器主要参数的分布以及入口温度和出口角的影响。结果表明，内部扩展结构严重破坏了喷嘴中的超声速流动，而冲洗型排出口对流体的影响很小。排出口的较小出口角度减小了其对超音速流动的影响。此外，具有回流的改进的装置扩大了超音速区域并表现出更好的性能。另外，它实现了低温（221 K）和高离心加速度（2.2×10〜（7）m s〜（？2））。此外，在综合考虑良好的膨胀特性和离心分离性能的基础上，改进的超声分离器推荐入口温度为300–320 K，出口角度为50°–60°。

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