base drag

简明释义

底部阻力

英英释义

例句

1.When designing a new model, the team focused on minimizing base drag during wind tunnel tests.

在设计新模型时，团队专注于在风洞测试中最小化基部阻力。

2.The aircraft's performance can be significantly affected by the amount of base drag, which is the resistance caused by the shape of the fuselage.

飞机的性能会受到基部阻力的显著影响，这种阻力是由机身的形状造成的。

3.A streamlined design can help reduce base drag and enhance overall aerodynamic performance.

流线型设计可以帮助减少基部阻力，增强整体气动性能。

4.Engineers often look for ways to reduce base drag in order to improve fuel efficiency.

工程师们常常寻找减少基部阻力的方法，以提高燃油效率。

5.The base drag of the vehicle increased as it approached higher speeds, affecting its stability.

随着车辆接近更高速度，基部阻力增加，影响了其稳定性。

作文

In the field of aerodynamics, understanding the various types of drag is crucial for enhancing the performance of aircraft. One specific type of drag that plays a significant role in determining an aircraft's efficiency is known as base drag. 基底阻力 occurs when air flows over the rear part of an object, creating a low-pressure region behind it. This phenomenon can be observed in various shapes, but it is particularly prominent in blunt bodies, such as the fuselage of an airplane or the body of a car.To comprehend how base drag affects an aircraft’s performance, we must first consider the concept of drag itself. Drag is the resistance experienced by an object as it moves through a fluid, which in most cases is air. There are several components of drag, including skin friction drag, pressure drag, and induced drag. Each of these components contributes to the overall drag force acting on the aircraft, but base drag is specifically related to the shape and size of the object’s rear end.When an aircraft flies, air flows over its surface and separates at the trailing edge. If the shape of the aircraft is blunt, the airflow cannot smoothly reattach to the surface, resulting in a turbulent wake and a drop in pressure at the base of the object. This drop in pressure creates a suction effect that pulls the object backward, contributing to the overall drag force. Therefore, base drag becomes a significant factor in the design and efficiency of aircraft.Minimizing base drag is essential for improving fuel efficiency and overall performance. Engineers and designers often focus on streamlining the shapes of aircraft to reduce this type of drag. For example, the use of tapered designs and rounded edges can help in reducing the turbulence created at the back of the aircraft. Additionally, the implementation of fairings and other aerodynamic devices can assist in smoothing out the airflow, thereby mitigating the effects of base drag.Moreover, understanding the implications of base drag extends beyond just aircraft design. It also plays a role in automotive engineering and other fields where objects move through air. For instance, race cars are designed with aerodynamics in mind, and minimizing base drag can lead to faster speeds and improved fuel consumption. Similarly, in the realm of architecture, buildings designed with aerodynamic principles can withstand high winds more effectively, showcasing the broader applicability of this concept.In conclusion, base drag is a critical aspect of aerodynamics that significantly influences the performance of various vehicles, especially aircraft. By understanding how base drag works and implementing design strategies to reduce it, engineers can create more efficient and effective flying machines. This not only enhances performance but also leads to better fuel economy and reduced environmental impact, making it a vital consideration in modern aerospace engineering. As technology continues to advance, the study and application of aerodynamic principles like base drag will remain at the forefront of innovation in transportation.

在空气动力学领域，理解各种类型的阻力对于提高飞机性能至关重要。其中一种对飞机效率有显著影响的阻力类型被称为基底阻力。基底阻力发生在空气流过物体的后部时，造成其后方形成低压区域。这一现象可以在各种形状中观察到，但在钝体上尤其显著，例如飞机的机身或汽车的车身。为了理解基底阻力如何影响飞机的性能，我们必须首先考虑阻力的概念。阻力是物体在流体中移动时所经历的阻力，在大多数情况下，这种流体是空气。阻力有几个组成部分，包括表面摩擦阻力、压力阻力和诱导阻力。每个组成部分都对作用于飞机的总阻力产生影响，但基底阻力特别与物体后端的形状和大小有关。当飞机飞行时，空气沿着其表面流动，并在尾缘处分离。如果飞机的形状是钝的，气流无法平滑地重新附着到表面，导致尾部形成湍流尾迹，并且物体后面的压力下降。这一压力下降会产生一种吸引效应，使物体向后拉，从而增加整体阻力。因此，基底阻力成为飞机设计和效率的重要因素。最小化基底阻力对于提高燃油效率和整体性能至关重要。工程师和设计师通常专注于流线型形状的设计，以减少这种类型的阻力。例如，使用渐尖设计和圆形边缘可以帮助减少飞机尾部产生的湍流。此外，实施整流罩和其他空气动力学装置可以帮助平滑气流，从而减轻基底阻力的影响。此外，理解基底阻力的影响不仅限于飞机设计。它在汽车工程和其他物体通过空气移动的领域也发挥着作用。例如，赛车在设计时考虑空气动力学，最小化基底阻力可以带来更快的速度和更好的燃油消耗。同样，在建筑领域，采用空气动力学原理设计的建筑物可以更有效地抵御强风，展示了这一概念的更广泛适用性。总之，基底阻力是空气动力学中的一个关键方面，对各种交通工具的性能产生重大影响，尤其是飞机。通过理解基底阻力的工作原理，并实施设计策略以减少它，工程师可以创造出更高效、更有效的飞行器。这不仅提高了性能，还改善了燃油经济性，减少了环境影响，使其成为现代航空航天工程中至关重要的考虑因素。随着技术的不断进步，像基底阻力这样的空气动力学原理的研究和应用将继续处于运输创新的前沿。