boundary layer

简明释义

边界层

英英释义

例句

1.Engineers must consider the boundary layer 边界层 when designing vehicles for high speeds.

工程师在为高速设计车辆时必须考虑<顺序>边界层。

2.The study of the boundary layer 边界层 is crucial for understanding wind patterns near the Earth's surface.

对<顺序>边界层的研究对于理解地球表面附近的风模式至关重要。

3.In fluid dynamics, the boundary layer 边界层 is where viscosity plays a significant role.

在流体动力学中，边界层是粘性发挥重要作用的地方。

4.In aerodynamics, the boundary layer 边界层 affects the drag on an aircraft.

在空气动力学中，边界层会影响飞机的阻力。

5.The thickness of the boundary layer 边界层 can change with different weather conditions.

不同天气条件下，边界层的厚度可以变化。

作文

The concept of the boundary layer is fundamental in fluid mechanics and plays a crucial role in various engineering applications. In simple terms, the boundary layer refers to the thin region of fluid that is affected by the presence of a solid surface, such as an airplane wing or a ship's hull. This layer is characterized by a gradual change in velocity from zero at the surface (due to the no-slip condition) to the free stream velocity outside the layer. Understanding the dynamics of the boundary layer is essential for predicting how fluids behave in different scenarios.In aerodynamics, the behavior of the boundary layer can significantly impact the performance of aircraft. For instance, when an airplane is flying, air flows over its wings, and the boundary layer forms on the wing's surface. If the boundary layer remains attached to the wing, it helps generate lift, allowing the aircraft to fly efficiently. However, if the boundary layer separates from the wing, it can lead to increased drag and a loss of lift, resulting in a stall. Engineers must carefully design wing shapes and control surfaces to manage the boundary layer effectively, ensuring smooth airflow and optimal performance.Similarly, in naval architecture, the boundary layer affects the hydrodynamics of ships. The resistance experienced by a vessel moving through water is influenced by the characteristics of the boundary layer that forms along its hull. By reducing the thickness of the boundary layer through streamlined designs or coatings, engineers can decrease drag and improve fuel efficiency. This understanding is crucial for designing faster and more efficient vessels that can navigate through water with minimal resistance.Moreover, the boundary layer concept extends beyond fluid mechanics into environmental science. For example, in meteorology, the boundary layer refers to the lowest part of the atmosphere that is directly influenced by the Earth's surface. This layer is essential for understanding weather patterns, pollution dispersion, and climate change. The interactions between the boundary layer and the surface can affect temperature, humidity, and wind patterns, making it a critical area of study for scientists and researchers.In conclusion, the boundary layer is a vital concept across various fields, including aerodynamics, naval architecture, and environmental science. Its implications are far-reaching, influencing the design and performance of vehicles, the understanding of natural phenomena, and the advancement of technology. By mastering the principles of the boundary layer, engineers and scientists can develop innovative solutions to complex challenges, ultimately leading to improved efficiency and sustainability in numerous applications.

边界层的概念在流体力学中是基础性的，并在各种工程应用中发挥着至关重要的作用。简单来说，边界层指的是受固体表面影响的流体的薄区域，例如飞机的机翼或船体。这一层的特征是，从表面（由于无滑移条件）到外部自由流动速度的速度逐渐变化。理解边界层的动态对于预测流体在不同场景中的行为至关重要。在空气动力学中，边界层的行为会显著影响飞机的性能。例如，当飞机飞行时，空气流过其机翼，边界层在机翼表面形成。如果边界层保持附着在机翼上，它有助于产生升力，使飞机高效飞行。然而，如果边界层从机翼分离，就会导致阻力增加和升力损失，最终导致失速。工程师必须仔细设计机翼形状和控制面，以有效管理边界层，确保气流平稳和最佳性能。类似地，在船舶设计中，边界层影响船舶的水动力学。船只在水中移动时所经历的阻力受到沿其船体形成的边界层特征的影响。通过通过流线型设计或涂层减少边界层的厚度，工程师可以降低阻力，提高燃油效率。这种理解对于设计更快、更高效的船舶至关重要，使它们能够以最小的阻力在水中航行。此外，边界层的概念超越了流体力学，延伸到环境科学。例如，在气象学中，边界层指的是直接受到地球表面影响的大气最低部分。这一层对于理解天气模式、污染扩散和气候变化至关重要。边界层与表面之间的相互作用可以影响温度、湿度和风模式，使其成为科学家和研究人员的重要研究领域。总之，边界层是各个领域的重要概念，包括空气动力学、船舶设计和环境科学。其影响深远，影响着车辆的设计和性能、自然现象的理解以及技术的进步。通过掌握边界层的原理，工程师和科学家可以开发出创新的解决方案来应对复杂的挑战，最终在众多应用中提高效率和可持续性。