密闭式电喷雾离子源中流场的分布特征
发布时间：2018-07-29 17:13
【摘要】：利用流体力学模拟软件Fluent构建了电喷雾离子源的二维模型,并基于所构建的模型探讨了离子源构型、辅助气引入方式、气体流速对源内流场分布的影响。结果表明,相比于其它两种结构,矩形结构的离子源能够提供较为稳定的流场。通入同轴辅助气和正交方向辅助气都能够起到聚集样品喷雾的效果,但作用效果却并不相同。提高同轴辅助气流速,能够增大喷口处混返区域,改变气流驻点位置。而增大正交方向辅助气流速,虽然同样能够提高源内各处气体流速,但并不会改变喷口处混返区域的大小。以Turbo V离子源为研究对象,考察了喷针位置、辅助气流速对溶液总离子流的影响,实验趋势与模拟结果基本吻合。
[Abstract]:The two-dimensional model of electrospray ion source was constructed by using fluid dynamics simulation software Fluent. Based on the established model, the effects of ion source configuration, auxiliary gas introduction mode and gas velocity on the distribution of flow field in the source were discussed. The results show that compared with the other two structures, the rectangular ion source can provide a more stable flow field. Both the coaxial auxiliary gas and the orthogonal auxiliary gas have the effect of collecting sample spray, but the effect is not the same. Increasing the coaxial auxiliary airflow velocity can increase the mixing area at the nozzle and change the airflow stop point position. However, increasing the orthogonal direction of the auxiliary airflow velocity can also increase the gas flow rate in the source, but it will not change the size of the mixing region at the nozzle. The effects of injection needle position and auxiliary airflow velocity on the total ion current of the solution were investigated with Turbo V ion source as the research object. The experimental results were in good agreement with the simulation results.
【作者单位】： 上海市功能性材料化学重点实验室华东理工大学化学与分子工程学院;中国计量科学研究院;南京理工大学化工学院;
【基金】：国家自然科学基金(No.21235005) 国家重大仪器设备开发专项(No.2012YQ120044)资助~~
【分类号】：TH833;TH843
，
本文编号：2153407
[Abstract]:The two-dimensional model of electrospray ion source was constructed by using fluid dynamics simulation software Fluent. Based on the established model, the effects of ion source configuration, auxiliary gas introduction mode and gas velocity on the distribution of flow field in the source were discussed. The results show that compared with the other two structures, the rectangular ion source can provide a more stable flow field. Both the coaxial auxiliary gas and the orthogonal auxiliary gas have the effect of collecting sample spray, but the effect is not the same. Increasing the coaxial auxiliary airflow velocity can increase the mixing area at the nozzle and change the airflow stop point position. However, increasing the orthogonal direction of the auxiliary airflow velocity can also increase the gas flow rate in the source, but it will not change the size of the mixing region at the nozzle. The effects of injection needle position and auxiliary airflow velocity on the total ion current of the solution were investigated with Turbo V ion source as the research object. The experimental results were in good agreement with the simulation results.
【作者单位】： 上海市功能性材料化学重点实验室华东理工大学化学与分子工程学院;中国计量科学研究院;南京理工大学化工学院;
【基金】：国家自然科学基金(No.21235005) 国家重大仪器设备开发专项(No.2012YQ120044)资助~~
【分类号】：TH833;TH843
，
本文编号：2153407
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