drag coefficient

简明释义

阻力系数

英英释义

例句

1.The car's performance can be significantly improved by reducing its drag coefficient (阻力系数).

通过降低汽车的drag coefficient（阻力系数），可以显著提高其性能。

2.Aerodynamic testing showed that the new design has a lower drag coefficient (阻力系数) than the previous model.

空气动力学测试表明，新设计的drag coefficient（阻力系数）低于之前的模型。

3.Engineers aim to reduce the drag coefficient (阻力系数) in order to enhance vehicle stability.

工程师们旨在降低drag coefficient（阻力系数），以增强车辆的稳定性。

4.The drag coefficient (阻力系数) of an aircraft is crucial for fuel efficiency.

飞机的drag coefficient（阻力系数）对燃油效率至关重要。

5.In cycling, a lower drag coefficient (阻力系数) allows for faster speeds with less effort.

在骑自行车时，较低的drag coefficient（阻力系数）可以让骑行者以更少的努力达到更快的速度。

作文

The concept of drag coefficient is fundamental in the field of fluid dynamics, particularly when analyzing the motion of objects through a fluid medium, such as air or water. The drag coefficient is a dimensionless number that quantifies the drag or resistance of an object in a fluid environment. It plays a critical role in determining how efficiently an object can move through a fluid, which is particularly important in various engineering applications, including automotive design, aerospace engineering, and even sports science.To understand the significance of the drag coefficient, one must first grasp what drag is. Drag is the force that opposes an object's motion through a fluid. This force arises due to the interaction between the fluid and the surface of the object. The amount of drag experienced by an object depends on several factors, including the shape of the object, its speed relative to the fluid, the density of the fluid, and the viscosity of the fluid. The drag coefficient serves as a key parameter that encapsulates many of these factors into a single value, making it easier to analyze and compare different shapes and designs.For instance, consider two vehicles designed for high-speed travel: a sports car and a boxy SUV. The sports car is typically designed with a sleek, aerodynamic shape that minimizes air resistance, resulting in a lower drag coefficient. In contrast, the SUV, with its larger frontal area and less aerodynamic shape, will have a higher drag coefficient. This difference in drag coefficient directly affects fuel efficiency and performance; a vehicle with a lower drag coefficient requires less energy to overcome air resistance, leading to better fuel economy.In the realm of aerospace, the drag coefficient is equally crucial. Aircraft are designed with specific shapes to optimize their drag coefficient, allowing them to fly more efficiently. For example, commercial airliners have a streamlined fuselage and wings designed to minimize drag. Engineers use wind tunnel testing to measure the drag coefficient of different designs, enabling them to iterate and improve upon existing models.Sports science also leverages the concept of drag coefficient, especially in activities like cycling and swimming. Athletes often seek to reduce their drag coefficient to enhance their performance. Cyclists may adopt specific body positions or use specialized gear to minimize air resistance, while swimmers might focus on their stroke techniques and body positioning to reduce drag in water. By understanding and optimizing their drag coefficient, athletes can gain a competitive edge.In conclusion, the drag coefficient is a vital concept in various fields that involve fluid dynamics. It not only helps engineers design more efficient vehicles and aircraft but also aids athletes in improving their performance. Understanding the drag coefficient allows for better predictions of how objects will behave in fluid environments, ultimately leading to advancements in technology and sports. As we continue to explore the intricacies of fluid dynamics, the drag coefficient will remain a central focus in our quest for efficiency and performance optimization.

在流体动力学领域，阻力系数的概念是基础，尤其是在分析物体通过流体介质（如空气或水）运动时。阻力系数是一个无量纲数，量化了物体在流体环境中的阻力或阻碍。它在确定物体通过流体的效率方面起着关键作用，这在汽车设计、航空航天工程甚至体育科学等各种工程应用中尤为重要。要理解阻力系数的重要性，首先必须理解阻力的含义。阻力是反对物体在流体中运动的力量。这种力量源于流体与物体表面之间的相互作用。物体所经历的阻力量取决于多个因素，包括物体的形状、相对于流体的速度、流体的密度和流体的粘度。阻力系数作为一个关键参数，将许多这些因素汇聚成一个单一的值，使得分析和比较不同形状和设计变得更加容易。例如，考虑两种设计用于高速行驶的车辆：一辆跑车和一辆方形SUV。跑车通常采用流线型的空气动力学形状，以最小化空气阻力，从而导致较低的阻力系数。相比之下，SUV由于其更大的正面面积和较不空气动力学的形状，将具有较高的阻力系数。这种阻力系数的差异直接影响燃油效率和性能；具有较低阻力系数的车辆需要更少的能量来克服空气阻力，从而实现更好的燃油经济性。在航空领域，阻力系数同样至关重要。飞机的设计具有特定的形状，以优化其阻力系数，使其飞行更加高效。例如，商用客机具有流线型的机身和机翼，旨在最小化阻力。工程师利用风洞测试来测量不同设计的阻力系数，使他们能够迭代并改进现有模型。体育科学也利用了阻力系数的概念，特别是在骑自行车和游泳等活动中。运动员通常寻求减少他们的阻力系数以提高表现。自行车手可能会采取特定的身体姿势或使用专业装备来最小化空气阻力，而游泳者则可能专注于他们的划水技巧和身体定位，以减少水中的阻力。通过理解和优化他们的阻力系数，运动员可以获得竞争优势。总之，阻力系数是涉及流体动力学的各个领域中一个重要的概念。它不仅帮助工程师设计更高效的车辆和飞机，还帮助运动员提高他们的表现。理解阻力系数使得更好地预测物体在流体环境中的行为成为可能，最终推动技术和体育的进步。随着我们继续探索流体动力学的复杂性，阻力系数将始终是我们追求效率和性能优化的中心焦点。