circulation theory of screw propeller

简明释义

螺旋桨环流理论

英英释义

例句

1.The design of modern ships heavily relies on the circulation theory of screw propeller 螺旋桨的环流理论 to optimize efficiency.

现代船舶的设计在很大程度上依赖于螺旋桨的环流理论 circulation theory of screw propeller 来优化效率。

2.The circulation theory of screw propeller 螺旋桨的环流理论 helps in analyzing the flow patterns around a rotating propeller.

利用螺旋桨的环流理论 circulation theory of screw propeller 可以分析旋转螺旋桨周围的流动模式。

3.Understanding the circulation theory of screw propeller 螺旋桨的环流理论 is crucial for improving underwater vehicle performance.

理解螺旋桨的环流理论 circulation theory of screw propeller 对于提高水下车辆性能至关重要。

4.Engineers use the circulation theory of screw propeller 螺旋桨的环流理论 to predict the thrust produced by different propeller designs.

工程师使用螺旋桨的环流理论 circulation theory of screw propeller 来预测不同螺旋桨设计产生的推力。

5.In naval architecture, the circulation theory of screw propeller 螺旋桨的环流理论 is applied to enhance ship maneuverability.

在船舶设计中，应用螺旋桨的环流理论 circulation theory of screw propeller 来增强船舶的机动性。

作文

The circulation theory of screw propeller is a fundamental concept in fluid dynamics, specifically in the study of marine propulsion systems. This theory provides a mathematical framework to understand how a screw propeller generates thrust in water. A screw propeller, which consists of rotating blades, interacts with the surrounding fluid, creating a flow pattern that can be analyzed using principles of circulation. The essence of this theory lies in the concept of circulation, which refers to the integral of the velocity field around a closed curve. In the context of a screw propeller, the circulation is generated as the blades rotate, leading to a difference in pressure on either side of the blades, ultimately resulting in thrust.To grasp the circulation theory of screw propeller, one must first understand the basic mechanics of how propellers work. When a propeller spins, it pushes water backwards, and according to Newton's third law of motion, an equal and opposite reaction occurs, propelling the vessel forward. The efficiency of this process is influenced by various factors, including the shape of the blades, the angle of attack, and the rotational speed. The circulation theory of screw propeller helps quantify these effects by providing a way to calculate the circulation around the blades based on their geometry and motion.Mathematically, the theory can be expressed through the Kutta-Joukowski theorem, which states that the lift per unit length of a rotating cylinder in an inviscid flow is proportional to the circulation around the cylinder. By applying this theorem to a screw propeller, engineers can predict the thrust produced by the propeller at different operating conditions. This predictive capability is crucial for the design and optimization of marine vessels, allowing engineers to create more efficient propulsion systems that save fuel and reduce environmental impact.In practical applications, the circulation theory of screw propeller has led to advancements in the design of propellers for various types of vessels, from small boats to large cargo ships. By utilizing computational fluid dynamics (CFD) simulations, engineers can visualize the flow patterns around propellers and make informed decisions about blade shape and configuration. These simulations help in minimizing drag, maximizing thrust, and improving overall performance.Moreover, understanding the circulation theory of screw propeller extends beyond just propeller design. It also plays a significant role in the development of other marine technologies, such as turbines and underwater vehicles. For instance, in the case of underwater drones, optimizing propeller design based on circulation principles can enhance maneuverability and efficiency.In conclusion, the circulation theory of screw propeller is an essential principle in marine engineering that aids in the understanding and optimization of propeller performance. By analyzing the circulation created by rotating blades, engineers can design more effective propulsion systems that contribute to the advancement of maritime technology. As the industry continues to evolve, the application of this theory will remain vital in creating sustainable and efficient marine transportation solutions.

螺旋桨的环流理论是流体动力学中的一个基本概念，特别是在海洋推进系统的研究中。该理论提供了一个数学框架，以理解螺旋桨如何在水中产生推力。螺旋桨由旋转的叶片组成，与周围液体相互作用，形成可以利用环流原理进行分析的流动模式。该理论的本质在于环流的概念，环流是指在闭合曲线周围速度场的积分。在螺旋桨的上下文中，随着叶片的旋转，产生环流，导致叶片两侧的压力差，最终产生推力。要掌握螺旋桨的环流理论，首先必须理解螺旋桨的基本工作原理。当螺旋桨旋转时，它将水向后推，根据牛顿第三定律，产生等量的反作用力，从而推动船只向前。这个过程的效率受到多种因素的影响，包括叶片的形状、攻角和转速。螺旋桨的环流理论通过提供一种根据叶片的几何形状和运动来计算环流的方法，帮助量化这些影响。在数学上，该理论可以通过库塔-乔克斯基定理来表达，该定理指出，在无粘流动中，旋转圆柱体的单位长度升力与圆柱体周围的环流成正比。通过将此定理应用于螺旋桨，工程师可以预测在不同操作条件下螺旋桨产生的推力。这种预测能力对于海洋船舶的设计和优化至关重要，使工程师能够创建更高效的推进系统，从而节省燃料并减少环境影响。在实际应用中，螺旋桨的环流理论推动了各种类型船舶螺旋桨设计的进步，从小型船只到大型货船。通过利用计算流体动力学（CFD）模拟，工程师可以可视化螺旋桨周围的流动模式，并就叶片形状和配置做出明智的决策。这些模拟有助于最小化阻力、最大化推力并提高整体性能。此外，理解螺旋桨的环流理论不仅限于螺旋桨设计。它在其他海洋技术的发展中也发挥着重要作用，例如涡轮机和水下车辆。例如，在水下无人机的情况下，基于环流原理优化螺旋桨设计可以增强机动性和效率。总之，螺旋桨的环流理论是海洋工程中的一个重要原则，有助于理解和优化螺旋桨性能。通过分析旋转叶片产生的环流，工程师可以设计出更有效的推进系统，为海洋技术的进步做出贡献。随着行业的不断发展，该理论的应用将在创造可持续和高效的海洋运输解决方案中继续发挥至关重要的作用。