lift force

简明释义

升力

英英释义

例句

1.In wind tunnels, scientists measure the lift force on different wing designs.

在风洞中，科学家测量不同机翼设计的升力。

2.Engineers calculate the lift force required for the helicopter to ascend safely.

工程师计算直升机安全上升所需的升力。

3.The airplane's wings generate a significant amount of lift force to keep it in the air.

飞机的机翼产生了大量的升力以保持飞行。

4.The lift force acting on a glider depends on its speed and angle of attack.

作用于滑翔机的升力取决于其速度和攻角。

5.A bird flaps its wings to create lift force that allows it to fly.

鸟类拍打翅膀以产生升力，使其能够飞翔。

作文

The concept of lift force is fundamental in the field of aerodynamics and plays a crucial role in the flight of aircraft. In simple terms, lift force refers to the upward force that counteracts the weight of an object and enables it to rise into the air. This force is generated when air flows over and under the wings of an airplane, creating a difference in pressure that results in lift. Understanding how lift force works is essential for engineers and pilots alike, as it directly impacts the design and operation of aircraft.To grasp the mechanics behind lift force, we must first consider Bernoulli's principle, which states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure. When an airplane moves forward, its wings are shaped to create a streamlined flow of air. The air traveling over the top of the wing moves faster than the air flowing underneath. Consequently, the pressure on top of the wing is lower than the pressure below it, resulting in a net upward force—the lift force.Moreover, the angle of attack, which is the angle between the wing's chord line and the oncoming air, significantly affects the amount of lift force generated. A higher angle of attack can increase lift up to a certain point; however, if the angle becomes too steep, it can lead to a stall, where the airflow separates from the wing surface, causing a dramatic loss of lift force.In practical applications, the understanding of lift force is not limited to aviation. It also applies to various fields such as marine engineering, where the principles of lift are used in the design of sails and hydrofoils. Additionally, sports like skiing and snowboarding utilize the concept of lift force when athletes perform aerial maneuvers, relying on the lift generated by their movements and equipment.Furthermore, advancements in technology have allowed for more efficient designs that optimize lift force. Modern aircraft are often equipped with winglets—small vertical fins at the tips of wings—that reduce drag and enhance lift efficiency. Engineers continuously study and test new materials and shapes to improve the aerodynamic properties of wings, aiming to maximize lift force while minimizing fuel consumption.In conclusion, the lift force is a vital concept that underpins the principles of flight and many other applications in engineering and sports. By understanding how lift force is generated and manipulated, we can innovate and improve technologies that rely on this fundamental force. Whether it is designing the next generation of aircraft or enhancing athletic performance, the importance of lift force cannot be overstated.

升力的概念在空气动力学领域中是基础，并在飞机的飞行中发挥着至关重要的作用。简单来说，升力是指抵消物体重量并使其升入空中的向上力量。当空气在飞机的机翼上方和下方流动时，升力便会产生，从而形成压力差，导致升力的产生。理解升力的工作原理对工程师和飞行员来说至关重要，因为它直接影响飞机的设计和操作。要理解升力背后的机制，我们必须首先考虑伯努利原理，该原理指出，流体速度的增加与压力的降低同时发生。当飞机向前移动时，其机翼的形状被设计成创建气流的流线型。流经机翼顶部的空气比流经底部的空气流速更快。因此，机翼上方的压力低于下方的压力，从而导致净向上的力量——升力。此外，攻角，即机翼弦线与迎面气流之间的角度，对生成的升力量有显著影响。较高的攻角可以增加升力，直到某个点；然而，如果攻角过大，可能导致失速，气流从机翼表面分离，导致升力的剧烈下降。在实际应用中，升力的理解并不仅限于航空。它还适用于海洋工程等各个领域，在这些领域中，升力的原理被用于帆和水翼的设计。此外，滑雪和单板滑雪等运动在运动员进行空中动作时也利用了升力的概念，运动员依靠自身动作和设备产生的升力。此外，技术的进步使得更高效的设计成为可能，优化升力。现代飞机通常配备有翼尖小翼——机翼末端的小垂直鳍片——以减少阻力并提高升力效率。工程师不断研究和测试新材料和形状，以改善机翼的空气动力学特性，旨在最大化升力的同时最小化燃料消耗。总之，升力是支撑飞行原理及许多其他工程和运动应用的重要概念。通过理解升力是如何产生和操控的，我们可以创新和改进依赖于这一基本力量的技术。无论是设计下一代飞机，还是提升运动表现，升力的重要性都不容小觑。