RESEARCH ON PREDICTION METHODS OF HEAT TRANSFER COEFFICIENT AND CRITICAL HEAT FLUX IN BOILING OF MULTICOMPONENT MIXTURES

多组分混合物沸腾传热系数和临界热通量预测方法研究

• 批准号: 14550187
• 负责人: FUJITA Yasunobu
• 金额: $ 2.43万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550187/
• 关键词: Multicomponent mixture; Nucleate boiling; Heat transfer coefficient; Critical beat flux; Correlations; Marangoni number; マランゴニ数; 多成分流体; 混合液; 核沸騰熱伝達; 熱伝達係数の予測法; 限界熱流束の予測法; 熱伝達の予測法

(1)Heat transfer coefficients in nucleate boiling of mixtures were measured for various two-component mixtures and three-component mixtures. It was found from the measured data analysis that the reduction of heat transfer coefficient compared to the ideal coefficient estimated from heat transfer coefficient of mixture components is deeply related to the boiling range. Thus by taking into account the boiling range as a key parameter the heat transfer correlation was developed. The developed correlation succeeded to reproduce the measured heat transfer coefficients of two-and three-component mixtures within ±25% errors.(2)Measurement of critical heat flux was performed for seven two-component mixtures. It was found that critical heat flux is either increased or decreased in 'a comparison of the ideal critical heat flux interpolated between the critical heat fluxes of mixture components. Positive mixtures provided the increased critical heat flux, while negative mixtures gave the decreased critical heat flux. Such a behavior of critical heat flux depending on the mixture property was concluded as the result of Marangoni force acting on thin film surface formed between the coalesced bubble and the heating wall. In order to realize such critical heat flux mechanism of mixtures the dimensionless Marangoni number was introduced, resulting in successful development of an empirical correlation for critical heat flux in mixture boiling.

(1)测量了各种二组分混合物和三组分混合物的核态沸腾传热系数。通过对测量数据的分析发现，与根据传热系数估算的理想系数相比，传热系数有所降低。混合物组分的传热系数与沸程密切相关，因此，通过将沸程作为关键参数，开发出的传热关联式成功地重现了两组分和三组分的传热系数的测量。 (2)对七种双组分混合物进行了临界热通量的测量，结果发现，在临界热通量与临界热通量之间插值的比较​​中，临界热通量要么增加，要么减少。正混合物提供了增加的临界热通量，而负混合物提供了降低的临界热通量，这种临界热通量的行为取决于混合物的性质，这是由于作用在薄膜表面上的马兰戈尼力的结果。之间形成的为了实现混合物的这种临界热通量机制，引入了无量纲马兰戈尼数，从而成功开发了混合物沸腾中临界热通量的经验相关性。

项目成果

筒井正幸, 藤田恭伸: "混合液における核沸騰気泡の挙動"第40回日本電熱シンポジウム講演論文集. 1. 147-148 (2003)

Masayuki Tsutsui、Yasunobu Fujita：“混合液体中核沸腾气泡的行为”第 40 届日本电热研讨会论文集 1. 147-148 (2003)。

筒井正幸, 藤田恭伸: "混合液の核沸騰限界熱流束"第41回日本電熱シンポジウム講演論文. 1. 25-26 (2004)

Masayuki Tsutsui、Yasunobu Fujita：“混合液体的核沸腾临界热通量”第 41 届日本电热研讨会演讲论文。 1. 25-26 (2004)。

Y.Fujita, M.Tsutsui: "Experimental Investigation in Pool Boiling Heat Transfer of Ternary Mixture and Heat Transfer Correlation"Experimental Thermal and Fluid Science. Vol.26. 237-244 (2002)

Y.Fujita，M.Tsutsui：“三元混合物池沸腾传热的实验研究和传热相关性”实验热与流体科学。

Masayuki Tsutsui, Yasunobu Fujita: "Bubble Behavior in Nucleate Boiling of Mixtures"Proceedings of the 40^<th> Heat Transfer Symposium Japan. Vol.1. 147-148 (2003)

Masayuki Tsutsui、Yasunobu Fujita：“混合物核沸腾中的气泡行为”第 40 届日本传热研讨会论文集。

筒井正幸, 藤田恭伸: "三成分混合液の核沸騰(発生気泡の挙動)"第39回日本伝熱シンポジゥム講演論文集. 3巻. 707-708 (2002)

Masayuki Tsutsui、Yasunobu Fujita：“三组分混合物的核沸腾（产生气泡的行为）”第 39 届日本传热研讨会论文集 3. 707-708（2002）。