propelling nozzle

简明释义

推力喷管

英英释义

例句

1.The rocket's engine uses a specially designed propelling nozzle to maximize thrust.

火箭的发动机使用专门设计的推进喷嘴来最大化推力。

2.During the test flight, the propelling nozzle functioned perfectly under extreme conditions.

在测试飞行中，推进喷嘴在极端条件下完美运行。

3.The design of the propelling nozzle affects the overall performance of the spacecraft.

推进喷嘴的设计影响航天器的整体性能。

4.In jet engines, the propelling nozzle plays a crucial role in accelerating exhaust gases.

在喷气发动机中，推进喷嘴在加速废气方面起着至关重要的作用。

5.Engineers studied the shape of the propelling nozzle to improve fuel efficiency.

工程师研究了推进喷嘴的形状，以提高燃油效率。

作文

The concept of a propelling nozzle is fundamental in the field of aerospace engineering, particularly in the design and functionality of jet engines and rocket propulsion systems. A propelling nozzle is essentially a device that converts thermal energy from combustion into kinetic energy, which results in thrust. This process is crucial for the operation of various types of aircraft and spacecraft, allowing them to achieve the necessary speed and altitude to perform their missions effectively.In a typical jet engine, air is compressed and mixed with fuel, which is then ignited to produce high-temperature exhaust gases. These gases expand rapidly and are expelled through the propelling nozzle. The shape and size of the nozzle play a significant role in determining the efficiency of thrust generation. For example, a converging nozzle accelerates the flow of exhaust gases, while a diverging nozzle can further increase the velocity of the gases after they have passed through the throat of the nozzle, leading to supersonic speeds.One of the most fascinating aspects of propelling nozzles is their adaptability to different flight conditions. In modern aerospace applications, engineers often employ variable-area nozzles, which can change their geometry based on the aircraft's speed and altitude. This adaptability ensures optimal performance across a wide range of operational scenarios, from takeoff to cruising and landing.The importance of propelling nozzles extends beyond traditional jet engines. In rocket propulsion, the design of the nozzle is even more critical due to the absence of atmospheric pressure at high altitudes. Rocket nozzles are designed to operate in a vacuum, and their efficiency is determined by the expansion of combustion gases as they exit the nozzle. The ideal rocket nozzle shape is often referred to as a 'bell-shaped' nozzle, which maximizes thrust by allowing gases to expand efficiently.Furthermore, advancements in materials science have led to the development of high-temperature resistant materials that can withstand the extreme conditions within a propelling nozzle. Innovations such as ceramic matrix composites and advanced cooling techniques have improved the durability and performance of these components, enabling higher thrust levels and greater fuel efficiency.In conclusion, the propelling nozzle is a pivotal component in propulsion technology, impacting both the efficiency and effectiveness of various aerospace vehicles. Understanding the mechanics and design principles of propelling nozzles is essential for engineers and scientists working in the aerospace industry. As we continue to push the boundaries of flight and space exploration, the role of propelling nozzles will remain a key area of research and development, influencing future innovations in propulsion systems and contributing to the advancement of aerospace technology.

“推进喷嘴”这一概念在航空航天工程领域是基础性的，特别是在喷气发动机和火箭推进系统的设计与功能方面。“推进喷嘴”本质上是一个将燃烧产生的热能转化为动能的装置，从而产生推力。这个过程对于各种类型的飞机和航天器的运行至关重要，使它们能够达到执行任务所需的速度和高度。在典型的喷气发动机中，空气被压缩并与燃料混合，然后点燃以产生高温废气。这些废气迅速膨胀并通过“推进喷嘴”排出。喷嘴的形状和大小在决定推力生成效率方面起着重要作用。例如，收敛喷嘴加速废气的流动，而发散喷嘴则可以在废气通过喷嘴喉部后进一步提高废气的速度，从而达到超音速。“推进喷嘴”的一个最迷人的方面是它们对不同飞行条件的适应性。在现代航空航天应用中，工程师们通常采用可变截面喷嘴，可以根据飞机的速度和高度改变其几何形状。这种适应性确保了在从起飞到巡航再到着陆等各种操作场景中的最佳性能。“推进喷嘴”的重要性不仅限于传统的喷气发动机。在火箭推进中，喷嘴的设计更加关键，因为在高空缺乏大气压力。火箭喷嘴被设计成在真空中工作，其效率取决于燃烧气体在喷嘴出口处的膨胀。理想的火箭喷嘴形状通常被称为“钟形”喷嘴，它通过允许气体有效膨胀来最大化推力。此外，材料科学的进步导致了高温耐受材料的发展，这些材料能够承受“推进喷嘴”内部的极端条件。诸如陶瓷基复合材料和先进冷却技术等创新提高了这些组件的耐用性和性能，使得更高的推力水平和更好的燃油效率成为可能。总之，“推进喷嘴”是推进技术中的关键组件，影响着各种航空航天器的效率和有效性。理解“推进喷嘴”的机械原理和设计原则对航空航天行业的工程师和科学家至关重要。随着我们继续推动飞行和太空探索的边界，“推进喷嘴”的作用将仍然是研究和开发的关键领域，影响未来推进系统的创新，并促进航空航天技术的进步。