critical Mach number

简明释义

临界马赫数

英英释义

例句

1.The design of the new fighter jet incorporates a higher critical Mach number 临界马赫数 for better performance.

新型战斗机的设计采用了更高的critical Mach number 临界马赫数以提高性能。

2.Exceeding the critical Mach number 临界马赫数 can lead to a loss of control and increased drag.

超过critical Mach number 临界马赫数可能导致失去控制和阻力增加。

3.During testing, engineers monitored the plane's performance as it approached the critical Mach number 临界马赫数.

在测试过程中，工程师监测了飞机在接近critical Mach number 临界马赫数时的性能。

4.The aircraft reached its critical Mach number 临界马赫数, causing significant changes in airflow around the wings.

飞机达到了它的critical Mach number 临界马赫数，导致机翼周围的气流发生显著变化。

5.Pilots must be aware of the critical Mach number 临界马赫数 to avoid shock waves that can destabilize the aircraft.

飞行员必须意识到critical Mach number 临界马赫数，以避免可能使飞机不稳定的冲击波。

作文

The concept of critical Mach number is essential in the field of aerodynamics, particularly when discussing the performance limits of aircraft. The critical Mach number refers to the speed at which an aircraft first begins to experience compressibility effects due to the airflow around it reaching the speed of sound. This phenomenon is crucial for engineers and pilots alike, as it marks the transition from subsonic to transonic flight regimes. Understanding this transition is vital for the design and operation of high-speed aircraft.When an aircraft flies below its critical Mach number, the airflow remains smooth and laminar over the wings and body. However, as the aircraft approaches this critical threshold, shock waves begin to form. These shock waves can induce increased drag and instability, which can significantly affect the aircraft's performance and handling characteristics. For instance, if a pilot exceeds the critical Mach number, the aircraft may experience a sudden increase in drag, potentially leading to a loss of control if not managed properly.Aircraft designers must take the critical Mach number into account when creating new models. They aim to design wings and fuselages that delay the onset of compressibility effects, thereby maximizing the aircraft's operational envelope. This involves optimizing the shape of the aircraft to ensure that it can operate efficiently at speeds approaching and beyond the critical Mach number. Engineers use computational fluid dynamics (CFD) simulations and wind tunnel testing to analyze how different designs will perform at various speeds.Moreover, the critical Mach number varies based on several factors, including the aircraft's altitude, configuration, and weight. Higher altitudes can lead to a lower critical Mach number due to the thinner atmosphere, which affects air density and pressure. Pilots must be aware of these variations and adjust their flight strategies accordingly to avoid exceeding the critical Mach number during critical phases of flight, such as takeoff and landing.In recent years, advancements in technology have allowed for the development of aircraft that can safely operate at higher speeds. These aircraft are designed with features such as swept wings and advanced materials that help manage the challenges associated with flying close to or beyond the critical Mach number. As aviation continues to evolve, understanding the critical Mach number remains a fundamental aspect of ensuring safety and efficiency in flight operations.In conclusion, the critical Mach number is a pivotal concept in aerodynamics that has significant implications for aircraft design and operation. It serves as a boundary between subsonic and transonic flight, where compressibility effects become pronounced. By understanding and respecting the critical Mach number, engineers and pilots can enhance the performance and safety of modern aircraft, paving the way for the future of aviation. As we continue to push the boundaries of flight, the knowledge surrounding the critical Mach number will remain an integral part of aeronautical science.

临界马赫数是气动学领域中的一个重要概念，尤其是在讨论航空器性能极限时。临界马赫数指的是航空器首次开始体验到由于周围气流达到音速而产生的压缩效应的速度。这一现象对于工程师和飞行员来说至关重要，因为它标志着从亚音速到跨音速飞行状态的过渡。理解这一过渡对高速度航空器的设计和操作至关重要。当航空器在其临界马赫数以下飞行时，气流在机翼和机身上保持平滑和层流。然而，随着航空器接近这一临界阈值，冲击波开始形成。这些冲击波会引起阻力和不稳定性的增加，从而显著影响航空器的性能和操控特性。例如，如果飞行员超过临界马赫数，航空器可能会经历突然的阻力增加，如果处理不当，可能导致失控。航空器设计师在创建新型号时必须考虑临界马赫数。他们旨在设计能够延迟压缩效应出现的机翼和机身，从而最大化航空器的操作范围。这涉及优化航空器的形状，以确保它能够在接近和超过临界马赫数的速度下高效运行。工程师使用计算流体动力学（CFD）模拟和风洞测试来分析不同设计在各种速度下的表现。此外，临界马赫数还会因多个因素而异，包括航空器的高度、配置和重量。较高的高度可能导致较低的临界马赫数，因为稀薄的大气影响了空气密度和压力。飞行员必须意识到这些变化，并相应调整飞行策略，以避免在关键飞行阶段（如起飞和着陆）超过临界马赫数。近年来，技术的进步使得能够开发出可以安全地在更高速度下飞行的航空器。这些航空器设计了诸如后掠翼和先进材料等特征，以帮助管理与接近或超过临界马赫数相关的挑战。随着航空业的不断发展，理解临界马赫数仍然是确保飞行操作安全和高效的基本方面。总之，临界马赫数是气动学中一个关键概念，对航空器的设计和操作具有重要影响。它作为亚音速和跨音速飞行之间的边界，在此边界上，压缩效应变得明显。通过理解和尊重临界马赫数，工程师和飞行员可以提升现代航空器的性能和安全性，为航空的未来铺平道路。随着我们不断突破飞行的边界，围绕临界马赫数的知识将继续成为航空科学的重要组成部分。