MEMS半填充微型气相色谱柱微流道设计及流场研究

Microfluidic Channel Design and Flow Field Study of MEMS Semi-Packed Micro Gas Chromatography Columns

基于微机电系统(MEMS)技术的微型气相色谱系统由于其便携性具有很高的研究价值。本文研究了流速均匀性对半填充微气相色谱柱分离效率的影响,并通过结构优化抑制传统半填充微型气相色谱柱流场的速度波动。提出了一种新型结构的半填充微型气相色谱柱(OSPC)。使用COMSOL Multiphysics软件对其内部流场进行模拟,与传统半填充微气相色谱柱(SPC)相比,OSPC结构可以有效提高流场均匀性。本文的研究为新型微气相色谱柱的设计提供了理论依据,并强调了均匀流速分布对提高气相色谱分离效率的重要性。

Based on micro electro mechanical systems (MEMS) technology, the portable nature of micro gas chromatography (GC) systems holds significant research value. This study investigates the impact of flow uniformity on the separation efficiency of a semi-packed micro gas chromatography column and proposes a structural optimization approach to suppress velocity fluctuations in the flow field of conventional semi-packed micro GC columns. A novel structure of a semi-packed micro GC column, termed the Optimized Structure Semi-packed Column (OSPC), is introduced. The internal flow field of the OSPC is simulated using COMSOL Multiphysics software, and compared to the traditional semi-packed column (SPC), the OSPC structure demonstrates improved flow uniformity. This re-search provides a theoretical basis for the design of novel micro GC columns, emphasizing the im-portance of uniform flow velocity distribution in enhancing gas chromatography separation effi-ciency.