| 异相凝结与同相凝结关系的实验研究 |
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| 引用本文： | 陈亮,张振中,江锋.异相凝结与同相凝结关系的实验研究[J].清华大学学报(自然科学版),2009(3). |
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| 作者姓名： | 陈亮 张振中 江锋 |
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| 作者单位： | 清华大学核能与新能源技术研究院; |
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| 基金项目： | 国家自然科学基金资助项目(50608044) |
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| 摘 要： | 蒸发冷凝法气溶胶发生技术中,异相凝结有利于提高气溶胶的单分散性,同相凝结则会降低其单分散性,因此,如何避免同相凝结的发生从而提高气溶胶的单分散性是技术的关键。该文利用蒸发冷凝法气溶胶发生装置,通过调节凝结核浓度和蒸气压,研究了异相凝结和同相凝结的生长规律,并重点研究了2种凝结之间的竞争关系。研究表明,在凝结核浓度高于某临界值时,异相凝结可以抑制同相凝结的发生,并且在不同的总流量和蒸气压下,凝结核临界浓度值均在1.0×106个.cm-3附近。
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| 关 键 词： | 蒸发冷凝法气溶胶发生 异相凝结 同相凝结 |
Experimental studies of the relationship between heterogeneous and homogeneous condensation |
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| CHEN Liang,ZHANG Zhenzhong,JIANG Feng.Experimental studies of the relationship between heterogeneous and homogeneous condensation[J].Journal of Tsinghua University(Science and Technology),2009(3). |
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| Authors: | CHEN Liang ZHANG Zhenzhong JIANG Feng |
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| Institution: | Institute of Nuclear and New Energy Technology;Tsinghua University;Beijing 100084;China |
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| Abstract: | With an evaporation-condensation aerosol generator,heterogeneous condensation improves the aerosol monodispersity,while homogeneous condensation degrades it. Therefore,the system must be designed to suppress homogeneous condensation to improve the aerosol monodispersity.The nuclei concentration and the vapor pressure in an evaporation-condensation aerosol generator were varied to analyze their effect on the heterogeneous and homogeneous condensation and the relationship between heterogeneous and homogeneous... |
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| Keywords: | evaporation-condensation aerosol generator heterogeneous condensation homogeneous condensation |
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