dynamic drag

简明释义

动力阻力

英英释义

例句

1.The engineer calculated the dynamic drag 动态阻力 on the aircraft during flight tests.

工程师在飞行测试中计算了飞机的动态阻力。

2.The formula for calculating dynamic drag 动态阻力 includes factors like speed and surface area.

计算动态阻力的公式包括速度和表面积等因素。

3.The dynamic drag 动态阻力 experienced by the boat increased as it moved faster through the water.

船在水中速度加快时，所经历的动态阻力增加。

4.Researchers are studying how dynamic drag 动态阻力 affects the efficiency of wind turbines.

研究人员正在研究动态阻力如何影响风力涡轮机的效率。

5.Understanding dynamic drag 动态阻力 is crucial for optimizing vehicle performance.

理解动态阻力对优化车辆性能至关重要。

作文

In the world of physics and engineering, the term dynamic drag refers to the resistance experienced by an object as it moves through a fluid, such as air or water. This phenomenon plays a crucial role in various fields, from aerospace engineering to automotive design. Understanding dynamic drag is essential for optimizing the performance of vehicles and aircraft, as it directly impacts speed, fuel efficiency, and overall design. When an object moves through a fluid, it displaces the fluid around it. The faster the object moves, the greater the force exerted on the fluid molecules, leading to increased resistance. This resistance is what we call dynamic drag. It consists of two main components: form drag and skin friction. Form drag is influenced by the shape of the object, while skin friction arises from the interaction between the fluid and the surface of the object. Engineers must carefully consider both factors when designing vehicles to minimize dynamic drag and improve their aerodynamic properties.For example, in the automotive industry, manufacturers invest significant resources into wind tunnel testing to analyze how different shapes affect dynamic drag. A streamlined car design can significantly reduce air resistance, allowing for higher speeds and better fuel economy. Similarly, in aviation, the design of an aircraft's wings and fuselage is optimized to reduce dynamic drag, enabling more efficient flight and longer ranges.Moreover, dynamic drag is not only a concern for vehicles but also for sports equipment. Athletes and manufacturers are continually looking for ways to reduce dynamic drag in sports like cycling, swimming, and skiing. For instance, cyclists often wear specially designed suits that minimize air resistance, while swimmers utilize streamlined swimsuits to cut through water more efficiently. These innovations demonstrate how understanding dynamic drag can enhance performance and give athletes a competitive edge.In conclusion, dynamic drag is a fundamental concept in physics that affects a wide range of applications, from vehicle design to sports performance. By studying and understanding dynamic drag, engineers and athletes alike can make informed decisions that lead to improved efficiency and effectiveness in their respective fields. As technology continues to advance, the importance of minimizing dynamic drag will only grow, making it a critical area of focus for future innovations.

在物理和工程的世界中，术语动态阻力指的是物体在流体（如空气或水）中移动时所经历的阻力。这一现象在多个领域中发挥着关键作用，从航空航天工程到汽车设计。理解动态阻力对于优化车辆和飞机的性能至关重要，因为它直接影响速度、燃油效率和整体设计。当一个物体在流体中移动时，它会排开周围的流体。物体移动得越快，对流体分子的作用力就越大，从而导致阻力增加。这种阻力就是我们所称的动态阻力。它主要由两个组成部分构成：形状阻力和表面摩擦。形状阻力受物体形状的影响，而表面摩擦则是由于流体与物体表面之间的相互作用而产生的。在设计车辆时，工程师必须仔细考虑这两个因素，以最小化动态阻力并改善其空气动力学特性。例如，在汽车工业中，制造商在风洞测试中投入大量资源，以分析不同形状如何影响动态阻力。流线型的汽车设计可以显著减少空气阻力，从而提高速度和燃油经济性。同样，在航空领域，飞机机翼和机身的设计经过优化，以减少动态阻力，实现更高效的飞行和更长的航程。此外，动态阻力不仅是车辆的关注点，也是运动器材的关注点。运动员和制造商不断寻找方法来减少在自行车、游泳和滑雪等运动中的动态阻力。例如，自行车手通常穿着专门设计的服装，以最小化空气阻力，而游泳者则利用流线型的泳衣，更有效地穿过水。这些创新展示了理解动态阻力如何提升表现，并为运动员提供竞争优势。总之，动态阻力是物理学中的一个基本概念，影响着从车辆设计到运动表现的广泛应用。通过研究和理解动态阻力，工程师和运动员都可以做出明智的决策，从而提高各自领域的效率和效果。随着技术的不断进步，最小化动态阻力的重要性将只会增加，使其成为未来创新的关键关注点。