atmospheric drag

简明释义

空气阻力

英英释义

例句

1.To improve performance, the new model of the aircraft reduces atmospheric drag 大气阻力 significantly.

为了提高性能，新型号的飞机显著减少了<气氛阻力>。

2.Engineers designed the rocket to minimize atmospheric drag 大气阻力 for better fuel efficiency.

工程师设计火箭以最小化<气氛阻力>，以提高燃油效率。

3.The spacecraft had to calculate the effects of atmospheric drag 大气阻力 during its re-entry phase.

宇宙飞船在再入阶段必须计算<气氛阻力>的影响。

4.As the satellite orbits Earth, it experiences atmospheric drag 大气阻力 that gradually lowers its altitude.

当卫星绕地球轨道飞行时，它会经历<气氛阻力>，这会逐渐降低其高度。

5.Calculating atmospheric drag 大气阻力 is essential for accurate predictions in aerodynamics.

计算<气氛阻力>对于空气动力学中的准确预测至关重要。

作文

In the realm of physics and engineering, the concept of atmospheric drag plays a crucial role in understanding how objects move through the air. Atmospheric drag refers to the resistance an object encounters as it travels through the atmosphere. This phenomenon is particularly significant for vehicles, aircraft, and even space shuttles, as it can greatly affect their speed, fuel efficiency, and overall performance.When an object moves through the air, it displaces air molecules, creating a force that opposes its motion. This force is what we refer to as atmospheric drag. The magnitude of this drag force depends on several factors, including the object's shape, size, speed, and the density of the air. For example, a streamlined airplane experiences less atmospheric drag than a blunt object like a brick because its design allows air to flow smoothly around it.Understanding atmospheric drag is essential for engineers who design vehicles meant to travel at high speeds. In aviation, reducing atmospheric drag is a key goal because it leads to improved fuel efficiency and increased range. Aircraft manufacturers often conduct wind tunnel tests to study how different designs affect atmospheric drag. By optimizing the shape of an aircraft, engineers can minimize drag and enhance performance.In the context of space travel, atmospheric drag becomes even more critical. When a spacecraft re-enters the Earth's atmosphere, it must contend with intense atmospheric drag that generates heat due to friction with air molecules. This is why spacecraft are equipped with heat shields; they protect the vehicle from the extreme temperatures caused by atmospheric drag during re-entry. Understanding the dynamics of atmospheric drag is vital for ensuring the safety and success of space missions.Moreover, atmospheric drag is not limited to large vehicles. Even small objects, such as parachutes or sports balls, experience this force. For instance, when a skydiver jumps from an airplane, they initially accelerate due to gravity, but as they gain speed, the atmospheric drag increases until it balances the gravitational force, leading to terminal velocity. This principle is crucial for skydivers to understand, as it affects their descent speed and landing technique.In conclusion, atmospheric drag is a fundamental concept that influences the movement of various objects through the air. Whether in the design of efficient airplanes, the safe re-entry of spacecraft, or the performance of athletes, understanding and managing atmospheric drag is essential. Engineers and scientists continue to study this phenomenon to develop better technologies and improve safety in air and space travel. As our understanding of atmospheric drag evolves, we can expect advancements that will further enhance our capabilities in navigating the skies and beyond.

大气阻力的概念在物理学和工程学领域中扮演着重要角色，它帮助我们理解物体如何在空气中运动。大气阻力是指物体在穿越大气时所遇到的阻力。这一现象对于车辆、飞机甚至航天飞机特别重要，因为它会极大地影响它们的速度、燃油效率和整体性能。当一个物体在空气中移动时，它会排开空气分子，产生一种与其运动相反的力。这种力就是我们所称的大气阻力。这种阻力的大小取决于多个因素，包括物体的形状、大小、速度以及空气的密度。例如，一架流线型的飞机所经历的大气阻力要比一块钝器（如砖头）少，因为它的设计允许空气平稳地流过它。理解大气阻力对于设计高速行驶车辆的工程师来说至关重要。在航空领域，减少大气阻力是一个关键目标，因为这可以提高燃油效率并增加航程。飞机制造商通常会进行风洞测试，以研究不同设计如何影响大气阻力。通过优化飞机的形状，工程师可以最小化阻力，增强性能。在太空旅行的背景下，大气阻力变得更加关键。当航天器重新进入地球大气层时，它必须应对强烈的大气阻力，由于与空气分子的摩擦而产生高温。这就是为什么航天器配备热盾的原因；它们保护航天器免受在重新进入过程中由于大气阻力引起的极端温度的影响。理解大气阻力的动态对于确保太空任务的安全和成功至关重要。此外，大气阻力并不仅限于大型车辆。即使是小物体，如降落伞或运动球，也会受到这种力的影响。例如，当跳伞者从飞机上跳下时，他们最初因重力加速，但随着速度的增加，大气阻力也增加，直到它与重力平衡，从而达到终极速度。这个原理对于跳伞者来说至关重要，因为它影响他们的下降速度和着陆技巧。总之，大气阻力是一个基本概念，它影响各种物体在空气中的运动。无论是在高效飞机的设计、安全重新进入航天器，还是运动员的表现中，理解和管理大气阻力都是至关重要的。工程师和科学家们继续研究这一现象，以开发更好的技术并提高航空和太空旅行的安全性。随着我们对大气阻力的理解不断发展，我们可以期待进一步的进步，从而增强我们在天空和更远领域的能力。