laminar boundary layer

简明释义

片流边界层

英英释义

例句

1.When designing pipes, engineers must consider the effects of the laminar boundary layer 层流边界层 on flow rates.

在设计管道时，工程师必须考虑 层流边界层 laminar boundary layer 对流量的影响。

2.The transition from a laminar boundary layer 层流边界层 to a turbulent one is critical in many aerodynamic applications.

在许多气动应用中，从 层流边界层 laminar boundary layer 转变为湍流是至关重要的。

3.In fluid dynamics, the concept of a laminar boundary layer 层流边界层 is crucial for understanding how fluids behave around objects.

在流体动力学中，层流边界层 laminar boundary layer 的概念对于理解流体在物体周围的行为至关重要。

4.The laminar boundary layer 层流边界层 can significantly reduce drag on streamlined bodies.

对流线型物体而言，层流边界层 laminar boundary layer 可以显著减少阻力。

5.Engineers often study the laminar boundary layer 层流边界层 to improve the efficiency of aircraft wings.

工程师们经常研究 层流边界层 laminar boundary layer 以提高飞机机翼的效率。

作文

In the study of fluid dynamics, one of the key concepts that engineers and scientists must understand is the formation of a laminar boundary layer. This term refers to a thin region adjacent to a solid surface where the flow of fluid is smooth and orderly, as opposed to chaotic or turbulent. The importance of the laminar boundary layer lies in its influence on drag forces and heat transfer between the fluid and the surface. When fluid flows over a surface, such as an airplane wing or a ship's hull, it creates different layers of flow. The layer closest to the surface is where the effects of viscosity are most pronounced, leading to the formation of this laminar boundary layer.Understanding the characteristics of the laminar boundary layer is crucial for optimizing designs in various engineering applications. For instance, in aerodynamics, a well-designed wing aims to maintain a laminar boundary layer for as long as possible to reduce drag and improve fuel efficiency. If the flow transitions from laminar to turbulent, it can cause increased drag and a loss of lift, which can be detrimental to aircraft performance.The thickness of the laminar boundary layer depends on several factors, including the speed of the fluid, the viscosity of the fluid, and the nature of the surface over which it flows. Engineers often use computational fluid dynamics (CFD) simulations to predict how the laminar boundary layer will behave under different conditions. By analyzing these simulations, they can make informed decisions about the shape and material of surfaces to achieve optimal flow characteristics.Another significant aspect of the laminar boundary layer is its role in heat transfer processes. In many industrial applications, such as heat exchangers, maintaining a laminar boundary layer can enhance thermal efficiency. The smooth flow allows for better thermal contact between the fluid and the surface, facilitating efficient heat transfer. Conversely, if the flow becomes turbulent, it can disrupt this contact and lead to inefficient heat exchange.Furthermore, the laminar boundary layer plays a vital role in environmental engineering. For example, in the design of pollution control systems, understanding how fluids interact with surfaces can help in designing effective filtration systems. A well-maintained laminar boundary layer can improve the efficiency of capturing pollutants from air or water.In conclusion, the concept of the laminar boundary layer is essential in various fields of engineering and science. Its impact on drag reduction, heat transfer, and environmental applications makes it a critical area of study. As technology advances, the ability to manipulate and control the laminar boundary layer will continue to play a significant role in improving the efficiency and effectiveness of numerous systems. Thus, a thorough understanding of this phenomenon is paramount for future innovations in fluid dynamics and engineering design.

在流体动力学的研究中，工程师和科学家必须理解的一个关键概念是层流边界层的形成。这个术语指的是紧邻固体表面的薄区域，在这个区域内，流体的流动是平滑而有序的，而不是混乱或湍流的。层流边界层的重要性在于它对流体与表面之间的阻力和热传递的影响。当流体流过表面，例如飞机机翼或船体时，会产生不同的流动层。最靠近表面的层是粘性效应最明显的地方，导致了层流边界层的形成。理解层流边界层的特性对于优化各种工程应用中的设计至关重要。例如，在空气动力学中，经过良好设计的机翼旨在尽可能长时间地保持层流边界层，以减少阻力并提高燃油效率。如果流动从层流转变为湍流，可能会导致阻力增加和升力损失，这对飞机性能是有害的。层流边界层的厚度取决于多个因素，包括流体的速度、流体的粘度以及流体流动的表面的性质。工程师通常使用计算流体动力学（CFD）模拟来预测层流边界层在不同条件下的行为。通过分析这些模拟，他们可以就表面的形状和材料做出明智的决定，以实现最佳的流动特性。层流边界层的另一个重要方面是它在热传递过程中的作用。在许多工业应用中，如热交换器，保持层流边界层可以提高热效率。平滑的流动允许流体与表面之间更好的热接触，从而促进有效的热传递。相反，如果流动变得湍流，它可能会破坏这种接触，并导致热交换效率低下。此外，层流边界层在环境工程中也发挥着重要作用。例如，在污染控制系统的设计中，理解流体如何与表面相互作用可以帮助设计有效的过滤系统。良好维护的层流边界层可以提高捕获空气或水中污染物的效率。总之，层流边界层的概念在各个工程和科学领域都是至关重要的。它对减少阻力、热传递和环境应用的影响使其成为一个关键的研究领域。随着技术的发展，操控和控制层流边界层的能力将继续在提高众多系统的效率和有效性方面发挥重要作用。因此，深入理解这一现象对于未来流体动力学和工程设计中的创新至关重要。