screw propeller

简明释义

螺旋推进器

英英释义

例句

1.The ship's speed increased significantly after the installation of a new screw propeller.

在安装了新的螺旋桨后，船的速度显著提高。

2.Many modern boats utilize a screw propeller for better performance.

许多现代船只使用螺旋桨以获得更好的性能。

3.The screw propeller is essential for the maneuverability of submarines.

螺旋桨对潜艇的机动性至关重要。

4.During the test, the screw propeller proved to be highly effective in rough waters.

在测试过程中，螺旋桨在恶劣水域中表现得非常有效。

5.Engineers designed a more efficient screw propeller to reduce fuel consumption.

工程师设计了一种更高效的螺旋桨以减少燃料消耗。

作文

The development of marine technology has led to various innovations, one of which is the screw propeller. This device has revolutionized how ships and submarines move through water. A screw propeller is essentially a rotating blade system that converts rotational energy into thrust, allowing vessels to navigate efficiently. Unlike traditional paddle wheels, the screw propeller operates on a different principle, utilizing the helical shape of its blades to create a pressure difference in the water. This design enables it to achieve higher speeds and better fuel efficiency.Historically, the screw propeller can be traced back to the early 19th century when it was invented by Scottish engineer James Watt and further developed by others, including John Ericsson. The introduction of the screw propeller marked a significant turning point in naval engineering, as it offered a more effective means of propulsion compared to earlier methods, such as sails and oars. The streamlined design of the screw propeller reduces drag, allowing ships to cut through water with minimal resistance.The mechanics behind a screw propeller are fascinating. When the propeller spins, its blades push water backwards, which in turn propels the vessel forward. The angle of the blades, known as the pitch, plays a crucial role in determining the efficiency and speed of the vessel. A higher pitch allows for greater speed, while a lower pitch provides better control at lower speeds. This adaptability makes the screw propeller suitable for various types of vessels, from small boats to large cargo ships.In addition to commercial shipping, the screw propeller is also widely used in recreational boating and military applications. Submarines, for example, utilize specially designed screw propellers that minimize noise, allowing them to operate stealthily underwater. The versatility of the screw propeller extends beyond just propulsion; it also contributes to maneuverability. Vessels equipped with multiple screw propellers can change direction more swiftly, enhancing their operational capabilities.Despite its advantages, the screw propeller is not without challenges. One notable issue is cavitation, which occurs when the pressure around the propeller drops below the vapor pressure of water, leading to the formation of bubbles. When these bubbles collapse, they can cause significant damage to the propeller blades. Engineers continuously work on improving the design and materials used in screw propellers to mitigate such problems.In conclusion, the screw propeller represents a remarkable advancement in marine technology. Its efficient design and ability to generate thrust have made it a staple in modern maritime transportation. As technology continues to evolve, we can expect further innovations in screw propeller design, enhancing performance and sustainability in the shipping industry. The impact of the screw propeller on our world is profound, facilitating global trade and exploration, and it remains an essential component of naval architecture today.

海洋技术的发展带来了各种创新，其中之一就是screw propeller（螺旋桨）。这种装置彻底改变了船只和潜艇在水中移动的方式。screw propeller（螺旋桨）本质上是一个旋转刀片系统，将旋转能量转化为推力，使船只能够高效航行。与传统的桨轮不同，screw propeller（螺旋桨）基于不同的原理，利用其叶片的螺旋形状在水中产生压力差。这种设计使其能够实现更高的速度和更好的燃油效率。历史上，screw propeller（螺旋桨）可以追溯到19世纪初，当时由苏格兰工程师詹姆斯·瓦特发明，并由其他人进一步发展，包括约翰·埃里克森。screw propeller（螺旋桨）的引入标志着海军工程的一个重大转折点，因为它提供了一种比早期方法（如帆和划桨）更有效的推进手段。screw propeller（螺旋桨）的流线型设计减少了阻力，使船只能够以最小的阻力切割水面。screw propeller（螺旋桨）的机械原理非常迷人。当螺旋桨旋转时，其叶片将水向后推，从而推动船只向前。叶片的角度，称为螺距，在决定船只的效率和速度方面起着关键作用。较高的螺距允许更大的速度，而较低的螺距则在较低速度下提供更好的控制。这种适应性使得screw propeller（螺旋桨）适用于各种类型的船只，从小型船只到大型货船。除了商业航运，screw propeller（螺旋桨）还广泛用于休闲船只和军事应用。例如，潜艇采用专门设计的screw propeller（螺旋桨），以最小化噪音，使其能够在水下隐秘操作。screw propeller（螺旋桨）的多功能性不仅限于推进；它还增强了机动性。配备多个screw propeller（螺旋桨）的船只可以更迅速地改变方向，增强其操作能力。尽管有其优势，screw propeller（螺旋桨）也面临挑战。其中一个显著问题是气蚀，当螺旋桨周围的压力降至水的蒸汽压以下时，会导致气泡的形成。当这些气泡崩溃时，会对螺旋桨叶片造成重大损害。工程师们不断致力于改进screw propeller（螺旋桨）的设计和材料，以减轻此类问题。总之，screw propeller（螺旋桨）代表了海洋技术的显著进步。其高效的设计和产生推力的能力使其成为现代海洋运输的基石。随着技术的不断发展，我们可以期待在screw propeller（螺旋桨）设计方面的进一步创新，提高航运业的性能和可持续性。screw propeller（螺旋桨）对我们世界的影响深远，促进了全球贸易和探索，至今仍是海军建筑的重要组成部分。