nucleate boiling

简明释义

核沸腾

英英释义

例句

1.The researchers found that controlling the pressure could optimize nucleate boiling (成核沸腾) in their system.

研究人员发现，控制压力可以优化他们系统中的nucleate boiling (成核沸腾)。

2.In a heat exchanger, nucleate boiling (成核沸腾) plays a crucial role in improving thermal performance.

在热交换器中，nucleate boiling (成核沸腾)在提高热性能方面起着关键作用。

3.During the experiment, we observed that the heat transfer efficiency increased significantly due to nucleate boiling (成核沸腾) on the heated surface.

在实验过程中，我们观察到由于加热表面上的nucleate boiling (成核沸腾)，热传递效率显著提高。

4.The presence of impurities in the liquid can significantly affect the onset of nucleate boiling (成核沸腾).

液体中杂质的存在会显著影响nucleate boiling (成核沸腾)的发生。

5.In many industrial applications, nucleate boiling (成核沸腾) is preferred for its ability to enhance cooling rates.

在许多工业应用中，nucleate boiling (成核沸腾)因其增强冷却速率的能力而受到青睐。

作文

Nucleate boiling is a fundamental phenomenon observed in heat transfer processes, particularly when a liquid is heated to its boiling point. This process occurs when small vapor bubbles form on the surface of a heated solid or within the bulk of the liquid itself. The term 'nucleate' refers to the formation of these bubbles at discrete points, known as nucleation sites. Understanding nucleate boiling (成核沸腾) is essential for engineers and scientists who work with thermal systems, as it significantly influences the efficiency of heat exchangers, boilers, and cooling systems.In practical applications, nucleate boiling (成核沸腾) plays a critical role in enhancing heat transfer rates. When a liquid is heated, the temperature rises until it reaches a point where the liquid begins to boil. At this stage, the heat energy supplied to the liquid causes it to transition from a liquid state to a gaseous state, resulting in the formation of vapor bubbles. These bubbles grow in size and eventually detach from the surface, carrying away heat from the heated surface and promoting efficient heat transfer.One of the key factors that influence nucleate boiling (成核沸腾) is the surface characteristics of the material in contact with the liquid. A rough or textured surface can provide more nucleation sites compared to a smooth surface, thereby enhancing the boiling process. Additionally, the presence of impurities or additives in the liquid can alter the boiling behavior by affecting the surface tension and the ability of bubbles to form.The dynamics of nucleate boiling (成核沸腾) are complex and depend on various parameters, including temperature, pressure, and fluid properties. For instance, increasing the temperature difference between the heating surface and the liquid can lead to a higher rate of bubble formation and growth, thus improving the overall heat transfer coefficient. However, if the temperature difference becomes too large, the boiling process may transition to a film boiling regime, which is less efficient due to the formation of an insulating vapor layer.Researchers have conducted numerous studies to better understand the mechanisms behind nucleate boiling (成核沸腾) and to optimize its application in industrial processes. By employing advanced techniques such as high-speed imaging and computational fluid dynamics, scientists have been able to visualize bubble dynamics and investigate the effects of various parameters on boiling performance. This knowledge is crucial for designing more efficient thermal systems that can operate under extreme conditions.In conclusion, nucleate boiling (成核沸腾) is a vital process in heat transfer that has significant implications for engineering and technology. Its understanding allows for the optimization of systems that rely on effective heat exchange, ultimately leading to improved energy efficiency and performance. As we continue to explore the intricacies of nucleate boiling (成核沸腾), we open the door to innovations that can enhance our capabilities in various fields, from power generation to refrigeration. The ongoing research in this area underscores the importance of this phenomenon in both academic and industrial settings, highlighting its relevance in our pursuit of sustainable and efficient technologies.

成核沸腾是热传递过程中观察到的一种基本现象，特别是在液体被加热到沸点时。当小气泡在加热固体的表面或液体内部形成时，就会发生这种过程。术语“成核”指的是这些气泡在离散点上形成，这些点被称为成核位点。理解成核沸腾（nucleate boiling）对从事热系统工作的工程师和科学家至关重要，因为它显著影响热交换器、锅炉和冷却系统的效率。在实际应用中，成核沸腾（nucleate boiling）在提高热传递速率方面发挥着关键作用。当液体被加热时，温度上升，直到达到开始沸腾的点。在这一阶段，施加于液体的热能使其从液态转变为气态，导致蒸汽气泡的形成。这些气泡在增大尺寸后最终从表面脱落，带走加热表面的热量，从而促进有效的热传递。影响成核沸腾（nucleate boiling）的关键因素之一是与液体接触的材料的表面特性。粗糙或有纹理的表面相比于光滑表面可以提供更多的成核位点，从而增强沸腾过程。此外，液体中杂质或添加剂的存在可以通过影响表面张力和气泡形成的能力来改变沸腾行为。成核沸腾（nucleate boiling）的动力学是复杂的，依赖于多种参数，包括温度、压力和流体特性。例如，增加加热表面与液体之间的温差可以导致更高的气泡形成和生长速率，从而改善整体热传递系数。然而，如果温差过大，沸腾过程可能会转变为膜沸腾状态，由于形成绝缘蒸汽层，效率较低。研究人员进行了大量研究，以更好地理解成核沸腾（nucleate boiling）背后的机制，并优化其在工业过程中的应用。通过采用高速成像和计算流体动力学等先进技术，科学家们能够可视化气泡动态，并研究各种参数对沸腾性能的影响。这些知识对于设计能够在极端条件下运行的更高效的热系统至关重要。总之，成核沸腾（nucleate boiling）是热传递中的一个重要过程，对工程和技术具有重大意义。对其理解使得能够优化依赖于有效热交换的系统，最终提高能源效率和性能。随着我们继续探索成核沸腾（nucleate boiling）的复杂性，我们为在各个领域（从发电到制冷）的能力提升开辟了新的可能性。该领域的持续研究突显了这一现象在学术和工业环境中的重要性，强调了它在追求可持续和高效技术方面的相关性。