rotating stall

简明释义

旋转失速

英英释义

例句

1.Understanding the mechanics of a rotating stall is crucial for aerodynamic research.

理解旋转失速的机制对空气动力学研究至关重要。

2.The aircraft experienced a rotating stall during the steep turn, causing a loss of altitude.

飞机在急转弯时经历了旋转失速，导致高度下降。

3.Pilots must be trained to recognize the signs of a rotating stall in order to recover safely.

飞行员必须接受培训，以识别旋转失速的迹象，以便安全恢复。

4.The design of the rotor blades aims to minimize the risk of a rotating stall in high-speed conditions.

旋翼叶片的设计旨在尽量减少在高速条件下发生旋转失速的风险。

5.During testing, the helicopter encountered a rotating stall, prompting engineers to adjust the flight controls.

在测试中，直升机遇到了旋转失速，促使工程师调整飞行控制。

作文

In the field of aerodynamics and turbomachinery, understanding phenomena such as rotating stall is crucial for engineers and scientists alike. Rotating stall refers to a specific type of aerodynamic instability that occurs in rotating machinery, particularly in compressors and turbines. This phenomenon can significantly impact the performance and efficiency of these machines, leading to potential failures if not properly managed. To better understand rotating stall, it is essential to first grasp the basic principles of how compressors and turbines operate. These machines rely on the continuous flow of air or fluid to generate thrust or pressure. As the rotor spins, it imparts energy to the incoming fluid, creating a high-pressure area at the exit. However, when certain conditions are met, the flow can become unstable, resulting in a rotating stall. The causes of rotating stall can vary, but they often stem from changes in operating conditions, such as variations in flow rate, temperature, or pressure. For instance, if the flow rate decreases too much, the angle of attack on the blades can increase beyond a critical point, causing a portion of the flow to separate from the blade surface. This separation leads to a loss of lift and an increase in drag, which can propagate around the rotor in a rotating manner, hence the name rotating stall. The implications of rotating stall are significant. In a compressor, for example, this instability can lead to a drop in pressure and efficiency, while in a turbine, it can cause vibrations and mechanical stresses that may damage the machine. Engineers must therefore design systems that can either avoid rotating stall or mitigate its effects. This can involve optimizing blade shapes, using advanced materials, or implementing control systems that adjust operating parameters in real time. Research into rotating stall has led to various methodologies for detection and prevention. Techniques such as aerodynamic modeling, computational fluid dynamics (CFD), and experimental testing are employed to study the behavior of airflow within these machines. By simulating different conditions, researchers can identify the onset of rotating stall and develop strategies to counteract its effects. In conclusion, the phenomenon of rotating stall is a critical aspect of modern engineering in the fields of aerodynamics and turbomachinery. Understanding its causes, effects, and potential solutions is essential for improving the reliability and efficiency of compressors and turbines. As technology continues to advance, ongoing research will undoubtedly yield new insights and innovations that can help manage rotating stall, ensuring the safe and efficient operation of these vital machines in various applications, from aviation to power generation.

在气动学和涡轮机械领域，理解诸如旋转失速这样的现象对于工程师和科学家来说至关重要。旋转失速指的是一种特定类型的气动不稳定性，发生在旋转机械中，特别是在压缩机和涡轮中。这种现象会显著影响这些机器的性能和效率，如果处理不当，可能导致潜在的故障。要更好地理解旋转失速，首先必须掌握压缩机和涡轮的基本原理。这些机器依赖于空气或流体的连续流动来产生推力或压力。当转子旋转时，它将能量传递给进入的流体，在出口处形成高压区域。然而，当某些条件得到满足时，流动可能变得不稳定，从而导致旋转失速。旋转失速的原因可能各不相同，但通常源于操作条件的变化，例如流量、温度或压力的变化。例如，如果流量下降过多，叶片上的攻角可能会增加到临界点以上，导致一部分流动从叶片表面分离。这种分离会导致升力损失和阻力增加，这会以旋转的方式在转子周围传播，因此得名旋转失速。旋转失速的影响是显著的。例如，在压缩机中，这种不稳定性可能导致压力和效率下降，而在涡轮中，它可能引起振动和机械应力，可能损坏机器。因此，工程师必须设计系统，以避免旋转失速或减轻其影响。这可能涉及优化叶片形状、使用先进材料或实施实时调整操作参数的控制系统。对旋转失速的研究已经导致了各种检测和预防的方法。气动建模、计算流体动力学（CFD）和实验测试等技术被用来研究这些机器内部的气流行为。通过模拟不同条件，研究人员可以识别旋转失速的发生，并制定对策以抵消其影响。总之，旋转失速现象是现代工程中气动学和涡轮机械领域的一个关键方面。了解其原因、影响和潜在解决方案对于提高压缩机和涡轮的可靠性和效率至关重要。随着技术的不断进步，持续的研究无疑会带来新的见解和创新，帮助管理旋转失速，确保这些在航空和发电等各种应用中至关重要的机器的安全高效运行。