propeller advance ratio

简明释义

螺旋桨进程系数

英英释义

例句

1.A higher propeller advance ratio 螺旋桨推进比 indicates better thrust-to-drag performance.

较高的螺旋桨推进比 螺旋桨推进比 表示更好的推力与阻力性能。

2.Pilots need to understand the implications of the propeller advance ratio 螺旋桨推进比 during takeoff and landing.

飞行员需要了解在起飞和着陆过程中螺旋桨推进比 螺旋桨推进比 的影响。

3.Engineers often analyze the propeller advance ratio 螺旋桨推进比 to improve fuel efficiency.

工程师通常分析螺旋桨推进比 螺旋桨推进比 以提高燃油效率。

4.The calculation of the propeller advance ratio 螺旋桨推进比 is crucial for optimizing aircraft performance.

计算螺旋桨推进比 螺旋桨推进比 对于优化飞机性能至关重要。

5.The design of the propeller is heavily influenced by the desired propeller advance ratio 螺旋桨推进比 for the vessel.

螺旋桨的设计受到船舶所需的螺旋桨推进比 螺旋桨推进比 的重大影响。

作文

The concept of propeller advance ratio is crucial in the field of aerodynamics and marine engineering. It refers to the relationship between the distance a propeller moves through the water or air and the amount of rotation it completes. Specifically, the propeller advance ratio is defined as the ratio of the effective forward speed of the vehicle to the speed of the propeller tip. This ratio is essential for understanding how efficiently a propeller converts rotational energy into thrust. In practical terms, when a propeller spins, it creates a pressure difference between its upper and lower surfaces, generating lift that propels the vehicle forward. The propeller advance ratio helps engineers determine the optimal design and performance characteristics of a propeller. A higher advance ratio indicates that the propeller is moving faster relative to its rotation, which often leads to improved efficiency and reduced drag. Conversely, a lower advance ratio may indicate that the propeller is not utilizing its potential power effectively, resulting in wasted energy and reduced performance.Understanding the propeller advance ratio is particularly important in the design of aircraft and ships. For instance, in aviation, different flight conditions require different propeller designs. A propeller that operates efficiently at low speeds may not perform well at high speeds, and vice versa. By analyzing the propeller advance ratio, engineers can create propellers that are optimized for specific flight profiles, ensuring maximum thrust and fuel efficiency.Similarly, in marine applications, the propeller advance ratio plays a vital role in the performance of ships and submarines. A well-designed propeller must balance the need for high thrust at low speeds with the requirement for efficiency at cruising speeds. This balance is achieved through careful consideration of the propeller advance ratio, allowing vessels to maintain speed while minimizing fuel consumption.Moreover, the propeller advance ratio also influences the noise and vibration characteristics of a vessel. A poorly matched advance ratio can result in excessive cavitation, which not only reduces efficiency but also generates noise that can be detrimental to marine life. Therefore, understanding and optimizing the propeller advance ratio is essential for both performance and environmental considerations.In conclusion, the propeller advance ratio is a fundamental parameter in the design and analysis of propellers in both aviation and marine engineering. It affects the efficiency, performance, and environmental impact of vehicles that rely on propellers for propulsion. As technology advances, engineers continue to refine their understanding of this critical ratio, leading to innovations that enhance the capabilities of aircraft and ships alike. Through ongoing research and development, the future of propulsion technology will undoubtedly benefit from a deeper understanding of the propeller advance ratio and its implications for performance and efficiency.

“推进器前进比”是航空动力学和海洋工程领域中的一个重要概念。它指的是推进器在水中或空气中移动的距离与其完成的旋转量之间的关系。具体而言，“推进器前进比”被定义为有效前进速度与推进器叶尖速度的比值。这个比率对于理解推进器如何有效地将旋转能量转化为推力至关重要。在实际应用中，当推进器旋转时，它会在其上表面和下表面之间产生压力差，从而产生升力，推动车辆向前移动。“推进器前进比”帮助工程师确定推进器的最佳设计和性能特征。较高的前进比表示推进器相对于其旋转运动得更快，这通常会导致效率提高和阻力减少。相反，较低的前进比可能表明推进器未能有效利用其潜在功率，导致能量浪费和性能下降。理解“推进器前进比”在飞机和船舶的设计中尤为重要。例如，在航空中，不同的飞行条件需要不同的推进器设计。一个在低速下高效运作的推进器在高速下可能表现不佳，反之亦然。通过分析“推进器前进比”，工程师可以创建针对特定飞行模式优化的推进器，以确保最大推力和燃油效率。同样，在海洋应用中，“推进器前进比”在船舶和潜艇的性能中也起着至关重要的作用。一个设计良好的推进器必须平衡低速下对高推力的需求和巡航速度下的效率要求。通过仔细考虑“推进器前进比”，船只能够在保持速度的同时最小化燃料消耗。此外，“推进器前进比”还会影响船舶的噪声和振动特性。不匹配的前进比可能导致过度气蚀，这不仅降低了效率，还产生对海洋生物有害的噪声。因此，理解和优化“推进器前进比”对于性能和环境考虑都是至关重要的。总之，“推进器前进比”是航空和海洋工程中推进器设计和分析的基本参数。它影响依赖推进器进行推进的车辆的效率、性能和环境影响。随着技术的进步，工程师们继续深化对这一关键比率的理解，推动增强飞机和船舶能力的创新。通过持续的研究和开发，推进技术的未来无疑将受益于对“推进器前进比”及其对性能和效率影响的更深入理解。