atmospheric drag

简明释义

大气阻力

英英释义

例句

1.The atmospheric drag increases with speed, making it important to consider in high-velocity flights.

随着速度的增加，大气阻力也会增加，因此在高速飞行中考虑这一点非常重要。

2.Engineers must account for atmospheric drag when designing rockets to ensure they can reach their intended orbits.

工程师在设计火箭时必须考虑大气阻力，以确保它们能够达到预定轨道。

3.Aerodynamic shapes are designed specifically to minimize atmospheric drag on vehicles.

空气动力学形状专门设计用于最小化车辆的大气阻力。

4.The spacecraft's speed was significantly reduced due to atmospheric drag, which is the resistance encountered as it moves through the atmosphere.

由于大气阻力，航天器的速度显著降低，这是它在大气中移动时遇到的阻力。

5.During re-entry, the atmospheric drag plays a crucial role in slowing down the vehicle before landing.

在重新进入过程中，大气阻力在减速车辆以便着陆时起着至关重要的作用。

作文

Understanding the concept of atmospheric drag is crucial for anyone interested in aerodynamics, aerospace engineering, or even sports that involve high-speed movement through the air. Atmospheric drag, also known as air resistance, refers to the forces that oppose the motion of an object as it travels through the atmosphere. This phenomenon occurs due to the collision of air molecules with the surface of the moving object, which generates a force that acts in the opposite direction to the object's velocity.In practical terms, atmospheric drag can significantly affect the performance and efficiency of vehicles, aircraft, and even projectiles. For instance, when an airplane takes off, it must overcome the atmospheric drag to gain altitude and speed. The shape of the airplane plays a vital role in determining how much drag it experiences. Streamlined designs help minimize atmospheric drag, allowing the aircraft to fly more efficiently.Similarly, in the realm of sports, athletes such as cyclists and runners must consider atmospheric drag when optimizing their performance. Cyclists often adopt aerodynamic postures to reduce their exposure to air resistance, thereby increasing their speed and efficiency. Understanding the principles of atmospheric drag can lead to better training techniques and equipment design, ultimately enhancing athletic performance.The effects of atmospheric drag are not limited to large objects like planes or cars; even small objects, such as a falling feather or a thrown baseball, experience this force. In fact, the study of atmospheric drag is essential for scientists and engineers who design various products, from simple toys to complex spacecraft. For example, when a spacecraft re-enters the Earth's atmosphere, it encounters significant atmospheric drag, which generates heat and can potentially damage the vehicle if not properly managed.To quantify atmospheric drag, engineers often use a dimensionless number called the drag coefficient, which depends on the shape of the object and the flow conditions of the air around it. By understanding and calculating this coefficient, designers can predict how much drag an object will encounter at different speeds and altitudes. This information is invaluable in fields such as automotive and aerospace design, where reducing drag can lead to improved fuel efficiency and performance.In conclusion, the concept of atmospheric drag is integral to many areas of science and engineering. It affects everything from the flight of airplanes to the performance of athletes, and understanding its principles can lead to significant advancements in technology and efficiency. As we continue to explore and innovate in various fields, the importance of minimizing atmospheric drag will remain a key consideration for future developments. Whether you are designing a new aircraft, optimizing a racing bike, or simply throwing a ball, recognizing the impact of atmospheric drag is essential for achieving optimal results.

理解大气阻力的概念对于任何对空气动力学、航空航天工程或甚至涉及高速运动的运动感兴趣的人来说都是至关重要的。大气阻力，也称为空气阻力，是指当物体在大气中移动时，反对物体运动的力量。这种现象是由于空气分子与移动物体表面的碰撞产生的，这会产生一个作用于物体速度相反方向的力。在实际应用中，大气阻力可以显著影响车辆、飞机甚至弹药的性能和效率。例如，当飞机起飞时，它必须克服大气阻力才能获得高度和速度。飞机的形状在决定其所经历的阻力程度上起着至关重要的作用。流线型设计有助于最小化大气阻力，使飞机能够更高效地飞行。同样，在体育领域，像自行车手和跑步者这样的运动员在优化他们的表现时必须考虑大气阻力。自行车手通常采取空气动力学姿势来减少他们暴露于空气阻力中的面积，从而提高速度和效率。理解大气阻力的原理可以导致更好的训练技术和设备设计，最终增强运动表现。大气阻力的影响不仅限于大型物体，如飞机或汽车；即使是小物体，如掉落的羽毛或投掷的棒球，也会经历这种力量。事实上，大气阻力的研究对设计各种产品的科学家和工程师至关重要，从简单的玩具到复杂的航天器。例如，当航天器重新进入地球大气层时，它会遇到显著的大气阻力，这会产生热量，如果没有妥善管理，可能会损坏飞行器。为了量化大气阻力，工程师通常使用一个无量纲数，即阻力系数，该系数取决于物体的形状和周围空气的流动条件。通过理解和计算这个系数，设计师可以预测物体在不同速度和高度下将遇到多少阻力。这些信息在汽车和航空航天设计等领域是非常宝贵的，减少阻力可以提高燃油效率和性能。总之，大气阻力的概念在许多科学和工程领域中都是不可或缺的。它影响从飞机的飞行到运动员的表现，理解其原理可以带来技术和效率的重大进步。随着我们在各个领域继续探索和创新，最小化大气阻力的重要性将始终是未来发展的关键考虑因素。无论你是在设计新飞机、优化赛车自行车，还是仅仅扔一个球，认识到大气阻力的影响对于实现最佳结果至关重要。