induced drag

简明释义

诱导阻力

英英释义

例句

1.When flying at high angles of attack, induced drag 诱导阻力 increases significantly.

在高攻角飞行时，诱导阻力显著增加。

2.To improve fuel efficiency, engineers worked on reducing induced drag 诱导阻力 in the new wing design.

为了提高燃油效率，工程师们致力于减少新机翼设计中的诱导阻力。

3.During a glide, the pilot must manage induced drag 诱导阻力 to maintain altitude.

在滑翔过程中，飞行员必须管理诱导阻力以维持高度。

4.The concept of induced drag 诱导阻力 is critical for understanding how lift and drag interact.

理解升力和阻力如何相互作用，诱导阻力的概念至关重要。

5.The pilot explained that the aircraft's performance is affected by induced drag 诱导阻力 during takeoff.

飞行员解释说，飞机在起飞过程中受到诱导阻力的影响。

作文

In the field of aerodynamics, understanding the forces acting on an aircraft is crucial for both design and performance. One of the key concepts in this area is induced drag, which refers to the drag force that results from the generation of lift. When an aircraft flies, its wings create lift by altering the airflow around them. However, this lift comes at a cost: the creation of induced drag. This phenomenon occurs due to the pressure difference between the upper and lower surfaces of the wing, which leads to the formation of vortices at the wingtips. These vortices increase the overall drag experienced by the aircraft, making it less efficient.To comprehend induced drag, we must first delve into the principles of lift generation. As an airplane moves forward, air flows over and under its wings. The shape of the wing, known as an airfoil, is designed to create a difference in air pressure. The wing's upper surface is curved, while the lower surface is relatively flat. This design causes the air to travel faster over the top of the wing, resulting in lower pressure above the wing compared to the higher pressure below. This pressure difference generates lift, allowing the aircraft to ascend.However, this lift generation is not without its drawbacks. The very act of creating lift leads to the formation of induced drag. As the aircraft climbs, the high-pressure air from below the wing spills over to the low-pressure area above, creating swirling vortices at the wingtips. These vortices represent a loss of energy and contribute to the overall drag experienced by the aircraft. Therefore, while lift is essential for flight, it simultaneously incurs a penalty in the form of induced drag.The amount of induced drag varies with several factors, including the angle of attack, airspeed, and wing design. At lower speeds, such as during takeoff or landing, the angle of attack is typically increased to generate sufficient lift. Unfortunately, this also increases the strength of the vortices and, consequently, the induced drag. Conversely, at higher speeds, the angle of attack decreases, leading to reduced induced drag. Therefore, pilots must carefully manage their speed and angle of attack to optimize performance and minimize drag.Aircraft designers have developed various strategies to mitigate induced drag. One common approach is to use winglets—small vertical extensions at the tips of the wings. Winglets help to reduce the strength of the vortices, thereby decreasing induced drag and improving fuel efficiency. Additionally, advanced wing designs, such as those found in modern gliders, are optimized to minimize induced drag across a wide range of speeds.In conclusion, induced drag is an inevitable consequence of lift generation in aviation. It represents a fundamental challenge that both pilots and engineers must address to improve aircraft performance. By understanding the mechanisms behind induced drag, we can develop more efficient aircraft and enhance our ability to navigate the skies. As aviation technology continues to evolve, the quest to minimize induced drag will remain a vital aspect of aerodynamics, ensuring safer and more efficient flight for all.

在空气动力学领域，理解作用于飞机的力对于设计和性能至关重要。一个关键概念是诱导阻力，它指的是由于产生升力而导致的阻力。当飞机飞行时，其机翼通过改变周围的气流来产生升力。然而，这种升力是有代价的：即产生了诱导阻力。这一现象是由于机翼上下表面之间的压力差异造成的，这导致在机翼尖端形成涡流。这些涡流增加了飞机所经历的总体阻力，使其效率降低。要理解诱导阻力，我们必须首先深入了解升力生成的原理。当飞机向前移动时，空气在其机翼上方和下方流动。机翼的形状，即翼型，旨在创造空气压力的差异。机翼的上表面是弯曲的，而下表面相对平坦。这种设计使得空气在机翼顶部的流速更快，从而导致机翼上方的压力低于下方的高压。这种压力差产生了升力，使飞机能够上升。然而，产生升力的行为并非没有缺点。产生升力的行为本身会导致诱导阻力的形成。当飞机爬升时，下方高压空气溢出到上方低压区域，在机翼尖端形成旋涡。这些涡流代表了能量的损失，并对飞机所经历的总体阻力做出了贡献。因此，虽然升力对于飞行至关重要，但它同时也带来了诱导阻力的惩罚。诱导阻力的大小与多个因素有关，包括攻角、空速和机翼设计。在较低速度下，例如起飞或着陆时，攻角通常会增加以产生足够的升力。不幸的是，这也会增加涡流的强度，从而增加诱导阻力。相反，在更高速度下，攻角会降低，导致诱导阻力减少。因此，飞行员必须仔细管理他们的速度和攻角，以优化性能并最小化阻力。飞机设计师已经开发了各种策略来减轻诱导阻力。一种常见的方法是使用翼尖小翼——在机翼尖端的小垂直延伸物。翼尖小翼有助于减少涡流的强度，从而降低诱导阻力并提高燃油效率。此外，现代滑翔机等先进的机翼设计被优化以在广泛的速度范围内最小化诱导阻力。总之，诱导阻力是航空中升力生成的不可避免的结果。它代表了飞行员和工程师必须解决的基本挑战，以改善飞机性能。通过理解诱导阻力背后的机制，我们可以开发出更高效的飞机，提高我们在天空中航行的能力。随着航空技术的不断发展，最小化诱导阻力的追求将始终是空气动力学的重要方面，确保所有人的飞行更加安全和高效。