中文摘要：

提出一种全新的再循环超音速分离管工作原理和结构设计。加工完成一套再循环超音速分离管,并进行了室内实验研究。实验表明,相比已研发的超音速分离管,在相同压损比下再循环超音速分离管可以获得更高的露点降,具有更好的除湿分离性能。为了进一步研究并预测再循环超音速分离管内流动规律和激波发生的位置,本文采用计算流体力学（CFD）理论,建立数学模型,进行了再循环超音速分离管内二维稳态可压缩流动的数值模拟计算。模拟结果表明：激波被转移到扩压管入口处发生,减少流动压力损失。此装置的结构设计能够提高脱水性能和效率。

英文摘要：

This paper presents basic structure and working principle of a novel recycling supersonic separator.At present,an experimental rig of the recycling supersonic separator was constructed and systematic experimental investigations were carried out.The experimental results showed that comparing with the already-existing supersonic separators,recycling supersonic separator could attain higher dew point depression with the same pressure loss ratio,which indicates that this novel device has better dehydration and separation performances.In order to study and predict the flow behavior and the shock wave location inside the recycling supersonic separator,a two-dimensional physical mathematical model was established and used to carry out the numerical simulation of steady flow inside the recycling supersonic separator.Simulation results show that the shock wave can be shifted to the inlet of diffuser,and the flow pressure loss can be reduced.So the configuration of this device can improve the dehydration performance and efficiency.