【摘要】：利用流體力學(xué)模擬軟件Fluent構(gòu)建了電噴霧離子源的二維模型,并基于所構(gòu)建的模型探討了離子源構(gòu)型、輔助氣引入方式、氣體流速對源內(nèi)流場分布的影響。結(jié)果表明,相比于其它兩種結(jié)構(gòu),矩形結(jié)構(gòu)的離子源能夠提供較為穩(wěn)定的流場。通入同軸輔助氣和正交方向輔助氣都能夠起到聚集樣品噴霧的效果,但作用效果卻并不相同。提高同軸輔助氣流速,能夠增大噴口處混返區(qū)域,改變氣流駐點(diǎn)位置。而增大正交方向輔助氣流速,雖然同樣能夠提高源內(nèi)各處氣體流速,但并不會(huì)改變噴口處混返區(qū)域的大小。以Turbo V離子源為研究對象,考察了噴針位置、輔助氣流速對溶液總離子流的影響,實(shí)驗(yàn)趨勢與模擬結(jié)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.
【作者單位】： 上海市功能性材料化學(xué)重點(diǎn)實(shí)驗(yàn)室華東理工大學(xué)化學(xué)與分子工程學(xué)院;中國計(jì)量科學(xué)研究院;南京理工大學(xué)化工學(xué)院;
【基金】：國家自然科學(xué)基金(No.21235005) 國家重大儀器設(shè)備開發(fā)專項(xiàng)(No.2012YQ120044)資助~~
【分類號(hào)】：TH833;TH843
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本文編號(hào)：2153407