偏离泡核沸腾(DNB)对于压水堆安全具有重要意义。
The departure from nucleate boiling (DNB) is important concerning about the safety of a PWR.
实验测量了新型共沸混合工质HC170/HFC23的池核沸腾传热特性。
The heat transfer data of nucleate pool boiling on a smooth flat surface were measured in HC170/HFC23 system.
实验结果表明：核沸腾传热曲线随过冷度增加而向左移动，与其它因素无关。
The experimental results showed that the high heat flux portions of heat transfer curves shifted to the left with elevating fluid subcooling and was independent of other factors.
添加界面活性剂的核沸腾在改变蒸气泡生长特性的同时，主要是强化了对流换热。
It is known that surfactant additive has important effect to nucleate boiling, surfactant additive mainly intensifies the convection of fluid while it changes the attribution of bubbles.
研究了带有同心套管的垂直圆柱形加热表面在环隙中通入空气时的核沸腾传热性能。
Nucleate boiling heat transfer on a vertical cylindrical heated surface with a concentric outer tube was investigated when air was introduced into the boiling liquid.
实验中观察到核态沸腾、汽液塞的聚合、破碎以及振荡等主要现象。
In the experiment, nuclear boiling, the convergence and break up of liquid-plug and vapor-slug were observed.
在透明的ITO玻璃上进行了R113的核态沸腾实验。
R113 nucleate boiling experiment was conducted on a transparent ITO glass.
当最大空穴半径趋近于最小空穴半径时，活化核心密度减小，核态沸腾受到抑制。
When the maximum radius approaches to the minimum, the active nucleation sites density decreases and the nucleation boiling is restrained.
随着干度的增加，核态沸腾在总换热系数中的比例由约20%下降至1%。
The numerical results indicate that the nucleate boiling contribution to the overall heat transfer coefficients de-creases from 20% to 1% with quality increasing.
另外，依据泡核激活机制的转变并结合界面汽化热阱效应对沸腾滞后进行机理分析。
The boiling hysteresis mechanism has been analyzed on the base of the interfacial vaporization heat sink effect and the change in activation way of boiling nuclei.
在地面常重力和落塔短时微重力实验中，观测到核态沸腾和双模态过渡沸腾现象。
Nucleate and two-mode transition boiling were observed during the experiments in both normal gravity and microgravity.
甚至改变局部传热状态由膜态沸腾转变为核态沸腾。
Even inflect local transmitting heat translate from film boiling to core boiling.
该模型认为环状流区域同时存在强制对流与核态沸腾两种换热方式。
The model assumes that forced convection and nucleate boiling coexist in the annular flow regime.
在透明的ITO玻璃上进行了R113的核态沸腾实验。
A R113 nucleate boiling experiment was conducted on a transparent ITO glass.
同时，加热表面上方还会出现由爆发沸腾向常规核态沸腾的过渡，通过转变时间这一特征参量能够对两种沸腾形态进行划分。
Besides, there is a changeover from explosive boiling state to conventional boiling state on the heating surface, and the transition can be denoted by changeover time.
本文提出了一种新的基于沸腾壁面微结构分析的预测核态池沸腾中汽化核心密度的方法。
A new method has been presented to predict the nucleation site density in nucleate pool boiling based on the investigation of the microstructure of boiling surface.
提出了一种基于沸腾表面微结构分析的预测核态沸腾中汽化核心密度的方法。
A method has been presented to predict the nucleation site density in nucleate boiling based on the investigation of the microstructure of boiling surface.
结果表明，纳米颗粒在界面处的吸附可减小核化的平衡胚泡半径，降低沸腾核化势垒，有利于核化的发生。
The results showed that nanoparticles accumulation at the vapor-liquid interface decreased embryo bubble radius and the potential barrier of nucleation, facilitating liquid nucleation.
结果表明，纳米颗粒在界面处的吸附可减小核化的平衡胚泡半径，降低沸腾核化势垒，有利于核化的发生。
The results showed that nanoparticles accumulation at the vapor-liquid interface decreased embryo bubble radius and the potential barrier of nucleation, facilitating liquid nucleation.
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