variable-area nozzle

简明释义

可变截面喷管

英英释义

例句

1.The variable-area nozzle in this turbocharger allows for better performance at varying speeds.

这个涡轮增压器中的可变截面喷嘴允许在不同速度下获得更好的性能。

2.Engineers tested the variable-area nozzle to enhance the efficiency of the propulsion system.

工程师测试了可变截面喷嘴以提高推进系统的效率。

3.Aircraft equipped with a variable-area nozzle can achieve superior maneuverability and speed.

配备可变截面喷嘴的飞机可以实现更卓越的机动性和速度。

4.The design of the rocket engine includes a variable-area nozzle to optimize thrust during different flight stages.

火箭发动机的设计包括一个可变截面喷嘴，以在不同飞行阶段优化推力。

5.In jet engines, a variable-area nozzle adjusts the exhaust flow to improve fuel efficiency.

在喷气发动机中，可变截面喷嘴调整排气流量以提高燃油效率。

作文

The concept of a variable-area nozzle is an essential aspect of fluid dynamics, particularly in aerospace engineering. A variable-area nozzle is designed to adjust its cross-sectional area during operation, allowing for improved performance across a range of conditions. This adaptability is vital in applications such as jet engines and rocket propulsion systems, where changes in speed and altitude can significantly affect the efficiency and thrust of the engine. The ability to modify the flow area enables engineers to optimize the performance of the system, providing better thrust-to-weight ratios and fuel efficiency.In a typical jet engine, the variable-area nozzle plays a crucial role in controlling the exhaust flow. By changing the nozzle's diameter, engineers can manage the speed of the exhaust gases, thus influencing the thrust produced by the engine. For instance, during takeoff, the nozzle may be opened wider to allow for maximum thrust, while at cruising altitude, it can be adjusted to a smaller diameter to improve fuel efficiency. This dynamic adjustment is particularly important in modern aircraft, where performance demands are high and fuel costs are a significant concern.The design of a variable-area nozzle often involves complex mechanisms, including actuators and control systems that respond to various flight parameters. These components work together to ensure that the nozzle operates efficiently and effectively under different conditions. Engineers must carefully consider the materials used in the construction of the nozzle, as they need to withstand high temperatures and pressures while maintaining structural integrity.Furthermore, the implementation of a variable-area nozzle can also enhance the maneuverability of aircraft. By adjusting the exhaust flow direction and speed, pilots can achieve better control during critical phases of flight, such as landing or evasive maneuvers. This capability is particularly beneficial in military applications, where agility and responsiveness can be decisive factors in combat situations.In addition to aviation, variable-area nozzles are also used in various industrial applications, such as gas turbines and power generation systems. In these contexts, the ability to optimize the flow of gases can lead to increased efficiency and reduced emissions, aligning with global efforts to promote sustainable energy practices.In conclusion, the variable-area nozzle is a remarkable innovation in the field of fluid dynamics that has far-reaching implications for both aerospace and industrial applications. Its ability to adapt to changing operational conditions enhances performance, improves fuel efficiency, and contributes to the overall effectiveness of propulsion systems. As technology continues to advance, the role of variable-area nozzles will likely expand, leading to even greater efficiencies and capabilities in the future.

可变截面喷嘴的概念是流体动力学，特别是在航空航天工程中的一个重要方面。可变截面喷嘴设计用于在运行过程中调整其横截面积，从而提高在各种条件下的性能。这种适应性在喷气发动机和火箭推进系统等应用中至关重要，因为速度和高度的变化会显著影响发动机的效率和推力。能够修改流动面积使工程师能够优化系统的性能，提供更好的推重比和燃油效率。在典型的喷气发动机中，可变截面喷嘴在控制排气流中发挥着关键作用。通过改变喷嘴的直径，工程师可以管理废气的速度，从而影响发动机产生的推力。例如，在起飞时，喷嘴可能会打开得更宽，以允许最大推力，而在巡航高度时，它可以调整为较小的直径，以改善燃油效率。这种动态调整在现代飞机中尤为重要，因为对性能的要求很高，燃料成本也是一个重大关切。可变截面喷嘴的设计通常涉及复杂的机制，包括执行器和控制系统，这些系统响应各种飞行参数。这些组件共同工作，以确保喷嘴在不同条件下高效有效地运行。工程师必须仔细考虑喷嘴构造中使用的材料，因为它们需要承受高温和高压，同时保持结构完整性。此外，实施可变截面喷嘴还可以增强飞机的机动性。通过调整排气流的方向和速度，飞行员可以在关键飞行阶段（如着陆或规避机动）实现更好的控制。这种能力在军事应用中尤其有利，因为敏捷性和反应能力在战斗情况下可能是决定性因素。除了航空，可变截面喷嘴还用于各种工业应用，如燃气涡轮和发电系统。在这些背景下，优化气体流动的能力可以提高效率并减少排放，与全球推动可持续能源实践的努力相一致。总之，可变截面喷嘴是流体动力学领域的一项显著创新，对航空航天和工业应用具有深远的影响。它适应不断变化的操作条件的能力提高了性能，改善了燃油效率，并有助于推进系统的整体有效性。随着技术的不断进步，可变截面喷嘴的作用可能会进一步扩大，未来将带来更大的效率和能力。