forced convection

简明释义

强制对流

英英释义

例句

1.The design of the air conditioning unit relies on forced convection (强制对流) to cool indoor spaces effectively.

空调单元的设计依赖于强制对流以有效冷却室内空间。

2.The cooling of electronic devices frequently employs forced convection (强制对流) to maintain optimal operating temperatures.

电子设备的冷却常常采用强制对流以保持最佳工作温度。

3.In a heating system, the use of a fan helps to enhance forced convection (强制对流) and distribute warm air throughout the room.

在加热系统中，使用风扇有助于增强强制对流并将暖空气分布到整个房间。

4.In cooking, ovens use forced convection (强制对流) fans to circulate hot air for even baking.

在烹饪中，烤箱使用强制对流风扇循环热空气以实现均匀烘焙。

5.In industrial processes, forced convection (强制对流) is often used to improve heat transfer rates.

在工业过程中，通常使用强制对流来提高传热速率。

作文

In the study of thermodynamics and fluid mechanics, one important concept is that of heat transfer. Heat transfer occurs in three primary ways: conduction, radiation, and convection. Among these, forced convection (强制对流) plays a significant role in various engineering applications, especially in heating and cooling systems. To understand forced convection better, it is essential to explore its mechanisms, applications, and advantages over natural convection.Forced convection refers to the process of heat transfer through a fluid (liquid or gas) that is forced to flow over a surface or through a channel by an external force, such as a fan or a pump. This is in contrast to natural convection, where the fluid motion is caused by buoyancy forces due to density differences resulting from temperature variations. In forced convection, the external force enhances the heat transfer rate by increasing the fluid velocity and promoting more effective mixing.One of the key advantages of forced convection is its efficiency in heat transfer. For instance, in a heating system, when air is blown over a radiator by a fan, it absorbs heat much faster than if it were merely relying on natural convection. This is because the forced airflow increases the rate at which warmer air is replaced by cooler air, thus improving the overall heating efficiency. Similarly, in cooling systems, such as air conditioning units, forced convection allows for quicker removal of heat from indoor spaces, making them more comfortable.The applications of forced convection are vast and varied. In the automotive industry, for example, radiators use forced convection to dissipate heat from the engine. The coolant circulates through the engine block and then passes through the radiator, where a fan blows air over the fins of the radiator to enhance heat transfer. This process is crucial for maintaining optimal engine temperatures and preventing overheating.In the food industry, forced convection is commonly used in ovens and dehydrators. Convection ovens utilize fans to circulate hot air around the food, ensuring even cooking and browning. This method not only speeds up the cooking process but also improves the texture and flavor of the food. Dehydrators use forced convection to remove moisture from food items efficiently, preserving them for longer periods.Moreover, forced convection is also prevalent in HVAC (heating, ventilation, and air conditioning) systems. These systems rely on fans to distribute conditioned air throughout buildings, ensuring consistent temperatures and improved indoor air quality. By using forced convection, HVAC systems can effectively manage heat loads and provide comfort in various environments.In conclusion, forced convection is a vital mechanism of heat transfer that enhances efficiency in numerous applications. Its ability to improve heat exchange rates makes it indispensable in industries ranging from automotive to food processing and HVAC. Understanding the principles of forced convection can lead to better design and optimization of systems that rely on this phenomenon, ultimately contributing to energy savings and improved performance.

在热力学和流体力学的研究中，一个重要的概念是热传递。热传递主要通过三种方式发生：导热、辐射和对流。在这三者中，强制对流（forced convection）在各种工程应用中发挥着重要作用，特别是在加热和冷却系统中。为了更好地理解强制对流，有必要探讨其机制、应用及其相对于自然对流的优势。强制对流是指通过流体（液体或气体）的热量转移过程，该流体因外部力量（如风扇或泵）被迫在表面或通道上流动。这与自然对流形成对比，在自然对流中，流体运动是由于温度变化引起的密度差异造成的浮力。强制对流通过增加流体速度和促进更有效的混合来增强热传递速率。强制对流的一个关键优势是其在热传递中的效率。例如，在加热系统中，当空气通过风扇被吹过散热器时，它吸收热量的速度远快于仅依靠自然对流的情况。这是因为强制气流增加了温暖空气被冷空气替换的速率，从而提高了整体加热效率。类似地，在冷却系统，如空调单元中，强制对流允许更快速地去除室内空间的热量，使其更加舒适。强制对流的应用广泛多样。在汽车工业中，例如，散热器利用强制对流将热量从发动机散发出去。冷却液在发动机缸体中循环，然后经过散热器，风扇在散热器的散热片上吹送空气，以增强热传递。这个过程对于维持最佳的发动机温度和防止过热至关重要。在食品工业中，强制对流通常用于烤箱和脱水机。对流烤箱利用风扇在食物周围循环热空气，确保均匀的烹饪和上色。这种方法不仅加快了烹饪过程，还改善了食物的质地和风味。脱水机使用强制对流高效去除食品中的水分，从而延长其保存时间。此外，强制对流在HVAC（供暖、通风和空调）系统中也很常见。这些系统依靠风扇将调节后的空气分配到建筑物中，确保温度一致并改善室内空气质量。通过使用强制对流，HVAC系统能够有效管理热负荷，并在各种环境中提供舒适感。总之，强制对流是一种重要的热传递机制，在众多应用中提高了效率。它改善热交换速率的能力使其在从汽车到食品加工和HVAC等各个行业中不可或缺。理解强制对流的原理可以更好地设计和优化依赖于这一现象的系统，最终有助于节能和提高性能。