downwash

简明释义

英[ˈdaʊnwɒʃ]美[ˈdaʊnˌwɑːʃ]

n. 气流下洗；向下运动；由高处冲下的物质

英英释义

单词用法

同义词

反义词

例句

1.Rotor wake effects are modeled in the form of a correction applied to the angle of attack along the blades. This correction is obtained by computing the local induced downwash with free wake analysis.

旋翼尾流的作用通过自由尾流分析来求解局部的诱导下洗速度以修正翼型攻角。

2.First, free wake analysis was carried out to calculate the rotor wake geometry and the downwash around the engine jet space.

首先应用自由尾流分析技术来计算旋翼尾迹和发动机绕排流空间的洗流速度。

3.In this thesis, the rolling moment characteristics of canard missies are studied, and theinfluence of downwash of canard was analyzed.

本文讨论了鸭式布局弹箭的滚转气动特性，分析了鸭舵的下洗影响作用。

4.The results show that the main aerodynamic effect between the rotor and fuselage is that of the rotor downwash on the fuselage aerodynamic loads.

结果表明，旋翼与机身之间的气动力干扰，主要是旋翼下洗尾流对机身气动力的影响。

5.Experiment results show that wake region behind wind tower can cause velocity deficit, turbulence excess and downwash phenomenon.

试验结果表明排气塔后部的尾流区能引起速度亏损、湍流增强和下冼现象。

6.Rotor wake effects are modeled in the form of a correction applied to the angle of attack along the blades. This correction is obtained by computing the local induced downwash with free wake analysis.

旋翼尾流的作用通过自由尾流分析来求解局部的诱导下洗速度以修正翼型攻角。

7.Finally the rotor downwash velocity distribution along rocket trajectory is found with brief analysis.

最后，计算结果展示了旋翼下洗速度在火箭轨道上的分布，并作了简要分析。

8.Other equipment in the cavernous space can replicate the downwash from rescue helicopters, and generate rain, darkness, 120-mile-per-hour winds, smoke and fire.

这个巨大的空间里还有其他一些设备，可以模拟救援直升机的下旋气流，也能制造降雨、黑暗、时速120英里的大风，以及烟和火。

9.Dust effects when driving over certain surfaces, rotor downwash effects for helicopters and VTOL aircraft.

粉尘影响驾车时的某些表面，转子影响直升机和垂直起降飞机。

10.The helicopter's rotor blades create a significant amount of downwash, which can affect nearby structures.

直升机的旋翼产生大量的下洗气流，这可能会影响附近的建筑物。

11.During takeoff, the downwash from the wings can lift debris off the runway.

起飞时，机翼产生的下洗气流可以将跑道上的碎片卷起。

12.Pilots must be aware of the downwash effects when flying close to other aircraft.

飞行员在靠近其他飞机时必须注意下洗气流的影响。

13.The downwash created by the drone was strong enough to disturb the water surface below.

无人机产生的下洗气流足以扰动下面的水面。

14.Engineers study downwash patterns to improve aircraft design and safety.

工程师研究下洗气流模式以改善飞机设计和安全性。

作文

In the field of aerodynamics, the term downwash refers to the downward movement of air that is generated by the wings of an aircraft during flight. This phenomenon is crucial for understanding how lift is created and how it affects the surrounding airflow. When an airplane flies, its wings cut through the air, causing the air above the wing to move faster than the air below it. According to Bernoulli's principle, this difference in speed creates a pressure difference, resulting in lift. However, as the air moves over the wings and then downwards, it creates a region of downwash behind the aircraft. The concept of downwash is not only important for the design of airplanes but also plays a significant role in the safety and performance of various aviation operations. For instance, when helicopters take off or land, they create a substantial amount of downwash. This can lead to dangerous conditions for personnel and equipment on the ground, especially if the helicopter is operating in confined spaces. Understanding and predicting the effects of downwash can help in planning safe operations around helicopters and other aircraft. Moreover, downwash has implications beyond just aviation. In meteorology, it can influence weather patterns and local wind systems. For example, the downwash created by large buildings or structures can affect wind flow in urban areas, leading to localized changes in temperature and precipitation. This is particularly relevant in cities where tall buildings can alter natural airflow, creating microclimates that may impact everything from energy consumption to public health. In terms of environmental science, understanding downwash can also assist in assessing the impact of wind turbines on surrounding ecosystems. The operation of wind turbines generates downwash that can affect local wildlife, particularly birds and bats. Researchers are increasingly focused on studying how the downwash produced by these turbines interacts with avian flight patterns to mitigate potential hazards and promote coexistence between renewable energy sources and wildlife. In conclusion, the term downwash encompasses a variety of phenomena across different fields, including aviation, meteorology, and environmental science. By understanding this concept, we can improve aircraft design, enhance safety protocols, and develop strategies to minimize environmental impacts. As technology continues to evolve, so too will our understanding of downwash, leading to innovations that could reshape how we approach flight and its interaction with the environment. The study of downwash serves as a reminder of the intricate relationships between man-made systems and the natural world, highlighting the importance of interdisciplinary research in addressing complex challenges.

在空气动力学领域，术语downwash指的是飞机在飞行过程中，由机翼产生的向下运动的空气。这一现象对于理解升力的形成及其对周围气流的影响至关重要。当飞机飞行时，其机翼切割空气，导致机翼上方的空气流速快于下方的空气。根据伯努利原理，这种速度差异会产生压力差，从而产生升力。然而，当空气经过机翼并向下移动时，会在飞机后方形成downwash区域。 downwash这一概念不仅对飞机设计至关重要，而且在各种航空操作的安全性和性能中也起着重要作用。例如，当直升机起飞或降落时，会产生大量的downwash。这可能会导致地面人员和设备的危险情况，尤其是在直升机在狭小空间内操作时。理解和预测downwash的影响可以帮助规划直升机和其他飞机周围的安全操作。 此外，downwash不仅限于航空领域。在气象学中，它可以影响天气模式和局部风系统。例如，大型建筑物或结构产生的downwash可能会影响城市地区的风流，导致温度和降水的局部变化。这在高楼大厦能够改变自然气流的城市中尤为相关，形成微气候，可能影响从能源消耗到公共健康的各个方面。 在环境科学方面，理解downwash也有助于评估风力涡轮机对周围生态系统的影响。风力涡轮机的运行会产生downwash，影响当地野生动物，特别是鸟类和蝙蝠。研究人员越来越关注研究这些涡轮机产生的downwash如何与鸟类的飞行模式相互作用，以减轻潜在的危害，促进可再生能源与野生动物之间的共存。 总之，术语downwash涵盖了不同领域的多种现象，包括航空、气象和环境科学。通过理解这一概念，我们可以改善飞机设计，增强安全协议，并制定减少环境影响的策略。随着技术的不断发展，我们对downwash的理解也将不断深化，从而推动创新，重塑我们对飞行及其与环境相互作用的看法。对downwash的研究提醒我们人造系统与自然界之间错综复杂的关系，突显了跨学科研究在应对复杂挑战中的重要性。