drag coefficient

简明释义

阻力系数

英英释义

例句

1.Engineers often test the drag coefficient 阻力系数 in wind tunnels to improve vehicle efficiency.

工程师们常常在风洞中测试drag coefficient 阻力系数以提高车辆效率。

2.The drag coefficient 阻力系数 of a streamlined car is much lower than that of a boxy vehicle.

流线型汽车的drag coefficient 阻力系数远低于方形车身的汽车。

3.A lower drag coefficient 阻力系数 means better fuel economy for airplanes.

较低的drag coefficient 阻力系数意味着飞机更好的燃油经济性。

4.The drag coefficient 阻力系数 of a bicycle can be reduced by adopting a more aerodynamic riding position.

通过采取更具空气动力学的骑行姿势，可以降低自行车的drag coefficient 阻力系数。

5.When designing sports cars, manufacturers aim for a low drag coefficient 阻力系数 to enhance performance.

在设计跑车时，制造商的目标是实现低drag coefficient 阻力系数以增强性能。

作文

The concept of drag coefficient is fundamental in the field of fluid dynamics and aerodynamics. It quantifies the drag or resistance an object experiences as it moves through a fluid, such as air or water. Understanding the drag coefficient is crucial for engineers and designers, especially when working on vehicles, aircraft, and even sports equipment. By analyzing the drag coefficient, one can optimize designs to reduce energy consumption and improve performance.To put it simply, the drag coefficient is a dimensionless number that represents the drag force acting on an object divided by the product of the fluid's density, the object's velocity squared, and a reference area. This relationship can be expressed in the equation: Drag Force = 0.5 * (Fluid Density) * (Velocity^2) * (Reference Area) * (Drag Coefficient).This equation illustrates how the drag coefficient plays a pivotal role in determining the overall drag force. For instance, a streamlined shape will generally have a lower drag coefficient compared to a blunt shape. This is why race cars and airplanes are designed with aerodynamic shapes; they aim to minimize drag and enhance speed and efficiency.In practice, the drag coefficient varies depending on several factors, including the shape of the object, the flow conditions of the fluid, and the surface roughness of the object. For example, a smooth sphere has a different drag coefficient than a rough one. Additionally, at different speeds, the flow around the object may transition from laminar to turbulent, which can also affect the drag coefficient.One significant application of the drag coefficient is in the automotive industry. Engineers use wind tunnel testing to measure the drag coefficient of various car designs. A lower drag coefficient means better fuel efficiency and higher speeds, which are critical factors for consumers. Manufacturers often highlight their vehicles' drag coefficient in marketing materials, emphasizing their commitment to performance and efficiency.In aviation, the drag coefficient is equally important. Aircraft designers strive to create wings and fuselages that minimize drag, allowing planes to fly faster and consume less fuel. The drag coefficient affects not only the aircraft's cruising speed but also its takeoff and landing performance.Similarly, in the world of sports, the drag coefficient can influence the performance of athletes. Cyclists, for example, wear specially designed suits and use aerodynamic bicycles to reduce their drag coefficient. Even small reductions in drag can lead to significant improvements in speed and efficiency during races.In conclusion, the drag coefficient is a critical parameter in understanding how objects interact with fluids. Its implications extend across various fields, including automotive design, aviation, and sports. By optimizing the drag coefficient, engineers and designers can create more efficient and high-performing products. As technology advances, the ability to accurately measure and manipulate the drag coefficient will continue to play a vital role in innovation and performance enhancement in many industries.

“阻力系数”这一概念在流体动力学和空气动力学领域中至关重要。它量化了物体在流体（如空气或水）中移动时所经历的阻力或阻碍。理解“阻力系数”对工程师和设计师尤其重要，特别是在处理车辆、飞机甚至体育设备时。通过分析“阻力系数”，可以优化设计以减少能耗并提高性能。简单来说，“阻力系数”是一个无量纲数，它表示作用在物体上的阻力与流体密度、物体速度平方和参考面积的乘积的比值。这个关系可以用以下方程表示：阻力 = 0.5 * （流体密度）* （速度^2）* （参考面积）* （阻力系数）。这个方程说明了“阻力系数”在决定整体阻力方面起着关键作用。例如，流线型形状通常具有比钝形状更低的“阻力系数”。这就是为什么赛车和飞机设计成气动形状；它们旨在最小化阻力，提高速度和效率。在实践中，“阻力系数”因多个因素而异，包括物体的形状、流体的流动条件以及物体的表面粗糙度。例如，光滑的球体与粗糙的球体具有不同的“阻力系数”。此外，在不同的速度下，物体周围的流动可能会从层流转变为湍流，这也会影响“阻力系数”。“阻力系数”的一个重要应用是汽车工业。工程师利用风洞测试来测量各种汽车设计的“阻力系数”。较低的“阻力系数”意味着更好的燃油效率和更高的速度，这对消费者来说都是关键因素。制造商经常在营销材料中突出其车辆的“阻力系数”，强调他们对性能和效率的承诺。在航空领域，“阻力系数”同样重要。飞机设计师努力创造能够最小化阻力的机翼和机身，使飞机飞得更快、消耗更少的燃料。“阻力系数”不仅影响飞机的巡航速度，还影响其起飞和着陆性能。同样，在体育界，“阻力系数”也会影响运动员的表现。例如，骑自行车的人穿着专门设计的服装并使用气动自行车以减少他们的“阻力系数”。即使是微小的阻力减少也可以在比赛中带来显著的速度和效率提升。总之，“阻力系数”是理解物体如何与流体相互作用的关键参数。它的影响遍及多个领域，包括汽车设计、航空和体育。通过优化“阻力系数”，工程师和设计师可以创造出更高效、更高性能的产品。随着技术的进步，准确测量和操控“阻力系数”的能力将在许多行业的创新和性能提升中继续发挥重要作用。