film coefficient of heat transfer

简明释义

薄膜传热系数表面散热系数

英英释义

例句

1.Higher velocities typically increase the film coefficient of heat transfer due to enhanced turbulence.

由于湍流增强，更高的流速通常会增加热传递膜系数。

2.The film coefficient of heat transfer is crucial in determining the efficiency of a heat exchanger.

热交换器的效率与热传递膜系数密切相关。

3.Engineers often calculate the film coefficient of heat transfer to optimize cooling systems.

工程师通常计算热传递膜系数以优化冷却系统。

4.The film coefficient of heat transfer is an important parameter in thermal analysis.

热传递膜系数是热分析中的一个重要参数。

5.In fluid dynamics, the film coefficient of heat transfer can vary significantly with flow conditions.

在流体动力学中，热传递膜系数会因流动条件而显著变化。

作文

The concept of the film coefficient of heat transfer is crucial in the field of thermal engineering and fluid mechanics. It refers to the measure of heat transfer across a boundary layer of fluid that is in contact with a solid surface. Understanding this coefficient is essential for engineers and scientists who are involved in designing systems where heat exchange is a critical factor, such as in heat exchangers, HVAC systems, and even in everyday appliances like refrigerators and ovens.In essence, the film coefficient of heat transfer quantifies how effectively heat can be transferred from the solid surface to the fluid or vice versa. This coefficient is influenced by various factors, including the properties of the fluid, the flow conditions (laminar or turbulent), and the temperature difference between the solid surface and the fluid. For instance, in a laminar flow situation, the film coefficient of heat transfer tends to be lower because the fluid layers move in parallel, creating a thicker thermal boundary layer that reduces heat transfer efficiency. On the other hand, in turbulent flow, the mixing of fluid layers enhances the heat transfer process, resulting in a higher coefficient.The calculation of the film coefficient of heat transfer can often be complex, involving empirical correlations and experimental data. Engineers use various dimensionless numbers, such as the Reynolds number and the Prandtl number, to help characterize the flow regime and determine the appropriate heat transfer coefficient. These parameters provide insights into the behavior of the fluid and the effectiveness of the heat transfer process.A practical application of understanding the film coefficient of heat transfer can be seen in the design of cooling systems for electronic devices. As electronics generate heat during operation, it is vital to dissipate this heat efficiently to prevent overheating. By analyzing the film coefficient of heat transfer, engineers can select appropriate cooling techniques, such as forced convection using fans or natural convection, to ensure optimal performance and longevity of the devices.Moreover, the film coefficient of heat transfer plays a significant role in environmental engineering, particularly in processes such as water treatment and waste management. Understanding how heat transfers through various mediums helps in designing efficient systems for treating wastewater, where temperature control can significantly impact the effectiveness of biological processes.In conclusion, the film coefficient of heat transfer is a fundamental parameter that influences a wide range of engineering applications. Mastering this concept not only aids in the design of efficient thermal systems but also contributes to advancements in technology and sustainability. As we continue to innovate and develop new materials and methods for heat transfer, a deep understanding of the film coefficient of heat transfer will remain indispensable for engineers and researchers alike.

热传递薄膜系数的概念在热工程和流体力学领域至关重要。它指的是在与固体表面接触的流体边界层中热量传递的度量。理解这个系数对参与设计热交换是关键因素的系统的工程师和科学家至关重要，例如在热交换器、暖通空调系统以及日常电器如冰箱和烤箱中。从本质上讲，热传递薄膜系数量化了热量从固体表面转移到流体或反之的有效性。这个系数受多种因素的影响，包括流体的性质、流动条件（层流或湍流）以及固体表面与流体之间的温差。例如，在层流情况下，热传递薄膜系数往往较低，因为流体层平行移动，形成较厚的热边界层，从而降低了热传递效率。另一方面，在湍流中，流体层的混合增强了热传递过程，导致系数更高。热传递薄膜系数的计算通常比较复杂，涉及经验相关性和实验数据。工程师使用各种无量纲数，如雷诺数和普朗特数，来帮助表征流动状态并确定适当的热传递系数。这些参数提供了流体行为和热传递过程有效性的见解。理解热传递薄膜系数的一个实际应用可以在电子设备的冷却系统设计中看到。由于电子产品在运行过程中会产生热量，因此有效散热以防止过热至关重要。通过分析热传递薄膜系数，工程师可以选择适当的冷却技术，例如使用风扇的强制对流或自然对流，以确保设备的最佳性能和使用寿命。此外，热传递薄膜系数在环境工程中也发挥着重要作用，特别是在水处理和废物管理等过程中。理解热量如何通过各种介质传递有助于设计高效的废水处理系统，其中温度控制对生物过程的有效性有显著影响。总之，热传递薄膜系数是影响广泛工程应用的基本参数。掌握这一概念不仅有助于设计高效的热系统，还有助于技术和可持续性的进步。随着我们继续创新和开发新的热传递材料和方法，对热传递薄膜系数的深刻理解将始终是工程师和研究人员不可或缺的。