cavitation threshold

简明释义

空化阈

英英释义

例句

1.In hydraulic systems, maintaining the pressure above the cavitation threshold (气蚀阈值) is crucial to prevent damage.

在液压系统中，保持压力高于cavitation threshold（气蚀阈值）对于防止损坏至关重要。

2.Engineers must calculate the cavitation threshold (气蚀阈值) to ensure efficient pump operation.

工程师必须计算cavitation threshold（气蚀阈值），以确保泵的高效运行。

3.The cavitation threshold (气蚀阈值) can vary significantly depending on the fluid properties and flow conditions.

根据流体特性和流动条件，cavitation threshold（气蚀阈值）可能会有显著变化。

4.A drop in pressure below the cavitation threshold (气蚀阈值) can lead to the formation of vapor bubbles.

压力降至cavitation threshold（气蚀阈值）以下会导致气泡的形成。

5.When designing propellers, the cavitation threshold (气蚀阈值) must be considered to enhance performance.

在设计螺旋桨时，必须考虑cavitation threshold（气蚀阈值）以提高性能。

作文

Cavitation is a phenomenon that occurs in fluids when the pressure drops below a certain level, leading to the formation of vapor bubbles. These bubbles can collapse violently, causing shock waves that can damage surrounding materials. The point at which these bubbles begin to form is known as the cavitation threshold (气蚀阈值). Understanding the cavitation threshold is crucial for various engineering applications, particularly in the design of pumps, turbines, and propellers.In hydraulic systems, the cavitation threshold is determined by several factors, including fluid velocity, temperature, and pressure. When the pressure in the fluid drops significantly, it reaches the cavitation threshold, resulting in the creation of vapor pockets. These vapor bubbles can grow and collapse, leading to potential erosion of metal surfaces and decreased efficiency of machinery.For instance, in centrifugal pumps, if the inlet pressure falls below the cavitation threshold, the pump will experience cavitation. This can lead to reduced performance, increased noise, and even catastrophic failure if not addressed. Engineers must carefully calculate the cavitation threshold to ensure that the pump operates well above this limit under all expected operating conditions.Moreover, the cavitation threshold is not a fixed value; it can vary depending on the operating conditions and the properties of the fluid. For example, increasing the temperature of the fluid typically lowers the cavitation threshold, making cavitation more likely to occur. Conversely, using additives or changing the fluid composition can raise the cavitation threshold, thereby enhancing the stability of the system.In marine engineering, understanding the cavitation threshold is vital for the design of propellers and hull shapes. If a propeller operates below its cavitation threshold, it can lead to significant performance losses and increased fuel consumption. Therefore, naval architects must consider the cavitation threshold during the design phase to optimize the efficiency and performance of vessels.In conclusion, the concept of cavitation threshold (气蚀阈值) plays a critical role in fluid dynamics and engineering. It is essential for ensuring the reliability and efficiency of various hydraulic systems. By understanding and managing the cavitation threshold, engineers can prevent cavitation-related issues and improve the overall performance of their designs. As technology advances, further research into the cavitation threshold will likely lead to new innovations and improvements in fluid mechanics, ultimately benefiting industries ranging from aerospace to energy production.

气蚀是流体中发生的一种现象，当压力降到某一水平以下时，导致蒸汽气泡的形成。这些气泡会剧烈崩溃，产生冲击波，可能会损坏周围材料。气泡开始形成的点被称为气蚀阈值(cavitation threshold)。理解气蚀阈值对于各种工程应用至关重要，特别是在泵、涡轮和螺旋桨的设计中。在液压系统中，气蚀阈值由多个因素决定，包括流体速度、温度和压力。当流体中的压力显著下降时，它达到气蚀阈值，导致蒸汽气泡的形成。这些蒸汽气泡可以生长并崩溃，导致金属表面的潜在侵蚀和机械效率的降低。例如，在离心泵中，如果进口压力低于气蚀阈值，泵将经历气蚀。这可能导致性能下降、噪音增加，甚至在未得到解决的情况下发生灾难性故障。工程师必须仔细计算气蚀阈值，以确保泵在所有预期工作条件下均高于此限制。此外，气蚀阈值并不是一个固定值；它可以根据操作条件和流体的性质而变化。例如，提高流体的温度通常会降低气蚀阈值，使气蚀更可能发生。相反，使用添加剂或改变流体成分可以提高气蚀阈值，从而增强系统的稳定性。在海洋工程中，理解气蚀阈值对于螺旋桨和船体形状的设计至关重要。如果螺旋桨在其气蚀阈值以下运行，可能会导致显著的性能损失和燃料消耗增加。因此，船舶设计师必须在设计阶段考虑气蚀阈值，以优化船舶的效率和性能。总之，气蚀阈值(cavitation threshold)的概念在流体动力学和工程中发挥着关键作用。它对确保各种液压系统的可靠性和效率至关重要。通过理解和管理气蚀阈值，工程师可以防止与气蚀相关的问题，并改善设计的整体性能。随着技术的进步，对气蚀阈值的进一步研究可能会导致流体力学的新创新和改进，最终使航空航天、能源生产等行业受益。