blade Reynolds number

简明释义

桨叶雷诺数

英英释义

例句

1.The blade Reynolds number (叶片雷诺数) is influenced by fluid viscosity and velocity.

流体的粘度和速度会影响叶片雷诺数 (叶片雷诺数)。

2.In wind tunnel testing, the blade Reynolds number (叶片雷诺数) is critical for simulating real-world operating conditions.

在风洞测试中，叶片雷诺数 (叶片雷诺数) 对于模拟现实操作条件至关重要。

3.A high blade Reynolds number (叶片雷诺数) indicates turbulent flow, which can impact efficiency.

高叶片雷诺数 (叶片雷诺数) 表示湍流，这可能影响效率。

4.Engineers must calculate the blade Reynolds number (叶片雷诺数) to ensure optimal blade design in propellers.

工程师必须计算叶片雷诺数 (叶片雷诺数) 以确保螺旋桨的最佳叶片设计。

5.The aerodynamic performance of the turbine can be predicted using the blade Reynolds number (叶片雷诺数) to assess flow conditions.

通过使用叶片雷诺数 (叶片雷诺数)来评估流动条件，可以预测涡轮的气动性能。

作文

The concept of the blade Reynolds number is crucial in the field of fluid dynamics, particularly when analyzing the behavior of fluids around solid objects such as blades in turbines or propellers. The blade Reynolds number is a dimensionless quantity that helps predict flow patterns and the transition between laminar and turbulent flow. It is defined as the ratio of inertial forces to viscous forces and is calculated using the formula: Re = (ρ * V * L) / μ, where ρ is the fluid density, V is the flow velocity, L is the characteristic length (typically the chord length of the blade), and μ is the dynamic viscosity of the fluid.Understanding the blade Reynolds number is essential for engineers and designers who work with rotating machinery. For instance, in the design of wind turbine blades, knowing the blade Reynolds number allows engineers to optimize the shape and size of the blades to maximize efficiency and energy capture. A low blade Reynolds number indicates that the flow is likely to be laminar, which can lead to lower drag but may not provide sufficient lift. Conversely, a high blade Reynolds number suggests that the flow is turbulent, which can enhance mixing and increase lift but also results in higher drag.In practical applications, the blade Reynolds number is used to scale up results from wind tunnel tests to real-world conditions. By understanding how the blade Reynolds number affects performance, engineers can make informed decisions about material selection, blade geometry, and operational parameters. For example, if a small-scale model of a turbine shows favorable results at a certain blade Reynolds number, engineers can use this information to predict how the full-scale turbine will perform under similar conditions.Moreover, the blade Reynolds number is not only limited to aerodynamics; it also plays a significant role in hydrodynamics. In marine applications, the blade Reynolds number aids in the design of ship propellers and underwater turbines, ensuring they operate efficiently in various water conditions. Understanding the blade Reynolds number helps in minimizing cavitation, which can cause damage to blades and reduce overall performance.In conclusion, the blade Reynolds number is a fundamental parameter in fluid dynamics that influences the design and performance of blades in various applications. Its significance extends beyond theoretical calculations; it has practical implications in engineering, allowing for better predictions of flow behavior and improved designs. As technology advances and the demand for efficient energy conversion increases, the importance of understanding and applying the blade Reynolds number will continue to grow, making it an essential concept for future engineers and scientists working in fluid mechanics and related fields.

“刀片雷诺数”这一概念在流体动力学领域至关重要，特别是在分析流体围绕固体物体（如涡轮或螺旋桨中的叶片）行为时。“刀片雷诺数”是一个无量纲量，有助于预测流动模式以及层流和湍流之间的转变。它被定义为惯性力与粘性力的比率，计算公式为：Re = (ρ * V * L) / μ，其中ρ是流体密度，V是流动速度，L是特征长度（通常是刀片的弦长），μ是流体的动态粘度。理解“刀片雷诺数”对工程师和设计师在旋转机械工作中至关重要。例如，在风力涡轮叶片的设计中，了解“刀片雷诺数”可以让工程师优化叶片的形状和大小，以最大限度地提高效率和能量捕获。低“刀片雷诺数”表明流动可能是层流，这会导致较低的阻力，但可能无法提供足够的升力。相反，高“刀片雷诺数”则表明流动是湍流，这可以增强混合和增加升力，但也会导致更高的阻力。在实际应用中，“刀片雷诺数”用于将风洞测试的结果缩放到真实世界条件。通过了解“刀片雷诺数”如何影响性能，工程师可以就材料选择、叶片几何形状和操作参数做出明智的决策。例如，如果小规模模型的涡轮在某个“刀片雷诺数”下显示出良好的结果，工程师可以利用这些信息来预测全尺寸涡轮在类似条件下的表现。此外，“刀片雷诺数”不仅限于空气动力学；它在水动力学中也发挥着重要作用。在海洋应用中，“刀片雷诺数”有助于船舶螺旋桨和水下涡轮的设计，确保它们在各种水域条件下高效运作。理解“刀片雷诺数”有助于最小化气蚀，这可能会对叶片造成损害并降低整体性能。总之，“刀片雷诺数”是流体动力学中的一个基本参数，影响着各种应用中叶片的设计和性能。它的重要性超越了理论计算；在工程实践中，它使流动行为的预测更加准确，并改进了设计。随着技术的进步和对高效能量转换的需求增加，理解和应用“刀片雷诺数”的重要性将继续增长，使其成为未来从事流体力学及相关领域的工程师和科学家必不可少的概念。