刘清江,雷贤良,刘吉安

• 1:西安交通大学动力工程多相流国家重点实验室

摘要(Abstract)：

二氧化碳（CO_2）布雷顿循环系统有着紧凑、高效、灵活的特点在第三代光热系统和第四代核电系统中具有良好的应用前景，而CO_2传热恶化现象影响着机组的安全运行。为研究竖直上升管内CO_2的传热恶化现象，在实验室建立了CO_2传热特性系统，对比了亚临界与超临界状态下CO_2传热特性，获得了热工参数对CO_2传热恶化的影响规律，并建立了CO_2临界热流密度预测关联，预测值与实验值吻合良好，误差在±30%以内。研究结果表明：亚临界压力下，CO_2发生传热恶化时壁温峰值更高；远离临界压力，增加质量流量均有利于抑制传热恶化的发生。

关键词(KeyWords)： 二氧化碳;传热恶化;临界热流密度;预测关联式

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（U1867218）;; 中国华能集团有限公司能源安全技术专项（HNKJ20-H87-04）~~

作者(Author): 刘清江,雷贤良,刘吉安

DOI: 10.19666/j.rlfd.202301011

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