Boiling Heat Transfer of Binary Mixture in a Tube
二元混合物在管内的沸腾传热
基本信息
- 批准号:62550157
- 负责人:
- 金额:$ 1.28万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1987
- 资助国家:日本
- 起止时间:1987 至 1988
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
1. Boiling heat transfer of Freon R11-R113 mixture flowing a uniformly heated vertical tube was experimented under various combinations of composition of mixture, pressure, mass velocity, heat flux and inlet condition. The test tube was heated by passing direct current through the tube which resulted in an excessive voltage drop across thermocouple junctions welded on the outer surface of the tube. Correcting method for this voltage drop was proposed and found to provide accurate wall temperature.2. Both the tube wall temperature and the bulk fluid temperature increase linearly in parallel along the tube length before the incipience of boiling. Heat Transfer coefficients in this non-boiling forced convection region are correlated well with Dittus and Boelter's Formula.3. At the point where boiling is initialed, wall temperature abruptly falls and hence heat transfer coefficient abruptly rises from the level of forced convection without phase change.4. Heat transfer coefficients in nucleate boiling regime at relatively low quality are independent to mass velocity. Heat transfer coefficients of mixture in this regime are found to become lower compared to the coefficients linearly interpolated by weighing the mole fraction on their single-component values. Proposed correlating methods for pool boiling of binary mixture are found to fail to correlate the data for flow boiling.Heat transfer coefficients in two-phase forced convection regime at relatively high quality are rather a weak function of local quality.6. For further detailed consideration to be performed on heat transfer characteristics of binary mixture, there are urgently required not only thermodynamic properties but transport properties for binary mixture.
1。在混合物的组成,压力,质量速度,热通量和入口条件的各种组合下,对流动均匀加热垂直管的Freon R11-R113混合物的沸腾传热进行了实验。通过将直流电流传递到管子上,从而加热了试管,从而导致在管的外表面上焊接的热电偶交界处的电压下降过多。提出了该电压下降的校正方法,并发现可提供准确的壁温。2。在煮沸之前,管壁温度和散装流体温度都沿着管长度平行线性增加。在这个非沸腾的强制对流区域中的传热系数与Dittus和Boelter的公式很好地相关。3。在沸腾的点,壁温度突然下降,因此传热系数突然从强制对流的水平上升而没有相变。4。质量相对较低的核沸腾状态中的传热系数独立于质量速度。与通过称重单个组分值的摩尔分数来线性插值相比,该状态中混合物中混合物的传热系数变得更低。提出的相关方法是发现二进制混合物的池沸腾的方法无法与流量沸腾的数据相关联。以相对较高的质量,两相强迫对流方案中的热传递系数是局部质量的较弱功能。6。为了进一步详细考虑二进制混合物的传热特性,不仅需要热力学特性,还需要用于二元混合物的传输特性。
项目成果
期刊论文数量(3)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Yasunobu Fujita et al.: "Boiling Heat Transfer of Binary Mixture Flowing a Vertical Tube" Proceedings of 25th National Heat Transfer Symposium of Japan. 1. 286-288 (1988)
Yasunobu Fujita 等:“垂直管流动的二元混合物的沸腾传热”日本第 25 届全国传热研讨会论文集。
- DOI:
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
藤田恭伸 他: 第25回日本伝熱シンポジウム講演論文集. 286-288 (1988)
Yasunobu Fujita 等人:第 25 届日本传热研讨会论文集 286-288 (1988)。
- DOI:
- 发表时间:
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- 影响因子:0
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藤田恭伸 他: Proceedings of lst KSME-JSME Thermal and Fluids Engineering Conference. 1. 144-149 (1988)
Yasunobu Fujita 等人:第一届 KSME-JSME 热与流体工程会议论文集。1. 144-149 (1988)。
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FUJITA Yasunobu其他文献
FUJITA Yasunobu的其他文献
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{{ truncateString('FUJITA Yasunobu', 18)}}的其他基金
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 - 财政年份:2002
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
INFLUENCE OF COMPOSITION ON HEAT TRANSFER AND CRITICAL HEAT FLUX IN BOILING OF MULTICOMPONENT MIXTURES
多组分混合物沸腾时成分对传热和临界热通量的影响
- 批准号:
12650208 - 财政年份:2000
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
MARANGONI EFFECT ON BOILING OF MIXTURES
马兰戈尼效应对混合物沸腾的影响
- 批准号:
09650243 - 财政年份:1997
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
THERMAL ENERY UTILIZATION WITH LOW EXERGY LOSS
热能利用,能量损失低
- 批准号:
06246106 - 财政年份:1994
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
High Density Array of Tubes in Horizontal Tube-Bundle Evaporator
卧式管束蒸发器中的高密度管阵列
- 批准号:
05555067 - 财政年份:1993
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
Enhancement of Flow Boiling Heat Transfer in High Quality Region in a Vertical Tube
垂直管内优质区域流动沸腾传热的强化
- 批准号:
03650184 - 财政年份:1991
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Heat Transfer in Post Dryout and Its Augmentation
干燥后的传热及其增强
- 批准号:
01550184 - 财政年份:1989
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for General Scientific Research (C)
Direct Contact Evaporation Process for Recovery of Waste Heat
回收废热的直接接触蒸发工艺
- 批准号:
60850041 - 财政年份:1985
- 资助金额:
$ 1.28万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research
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Development of Numerical Experimental Model for Heat Transfer in High Quality Region of Flow Boiling in Tube Evaporator with Twisted Tape-Insert
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