Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Fluid Dynamics
The study of the flow of gases and liquids, usually in and around solid surfaces, is known as fluid dynamics in physics and engineering. Fluid dynamics, for example, can be used to evaluate the movement of air through an airplane wing or the surface of a…
Question

A hovercraft weighs M = 1500 kg and hovels without changing altitude. The exit flow exhausts to atmospheric pressure at sea-level. The flow is steady, incompressible and uniform properties can be assumed on all control surfaces. Assume air density = 122 kg/m^3.

 

### Diagram Explanation: Funnel Structure with Rotor The diagram shows a funnel-shaped structure with a rotor placed at the narrowest point. Below is the detailed breakdown of the diagram: 1. **Funnel Structure:** - The diagram illustrates a symmetrical funnel-shaped structure. - The widest part of the funnel has a diameter of 3.3 meters on both the top and the bottom. - The narrowest part of the funnel, where the rotor is located, has a diameter slightly less than 3.3 meters but this specific measurement is not provided in the diagram. 2. **Rotor:** - Inside the funnel, there is a rotor positioned at the narrowest point. - The rotor is depicted inside a conical section which has a height of 3.0 meters. This diagram might be illustrating a mechanical or fluid dynamics concept where the rotor's position within the funnel is crucial, likely for regulating flow or for a mechanical advantage based on the funnel's shape. The detailed measurements indicate that precision is important in whatever application this structure and rotor assembly are used for.
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Transcribed Image Text:### Diagram Explanation: Funnel Structure with Rotor The diagram shows a funnel-shaped structure with a rotor placed at the narrowest point. Below is the detailed breakdown of the diagram: 1. **Funnel Structure:** - The diagram illustrates a symmetrical funnel-shaped structure. - The widest part of the funnel has a diameter of 3.3 meters on both the top and the bottom. - The narrowest part of the funnel, where the rotor is located, has a diameter slightly less than 3.3 meters but this specific measurement is not provided in the diagram. 2. **Rotor:** - Inside the funnel, there is a rotor positioned at the narrowest point. - The rotor is depicted inside a conical section which has a height of 3.0 meters. This diagram might be illustrating a mechanical or fluid dynamics concept where the rotor's position within the funnel is crucial, likely for regulating flow or for a mechanical advantage based on the funnel's shape. The detailed measurements indicate that precision is important in whatever application this structure and rotor assembly are used for.
### Hovercraft Power Requirements #### a) Develop an equation for the required power input to the rotor of the hovercraft. Assume negligible internal change, potential energy change, flow work (e.g., pressure effects), and heat transfer. --- #### b) Calculate a numerical value for the required power input. --- ### Explanations: 1. **Equations for Power Input**: - When developing an equation for the power input, consider the principles of conservation of energy and the specific parameters and assumptions provided. - Negligible internal changes, potential energy changes, flow work, and heat transfer simplify the problem to focus primarily on the kinetic aspects and operational needs of the rotor. 2. **Numerical Calculation**: - Once the equation is established, substitute the relevant numerical values to estimate the actual power input required for the hovercraft's operations. This setup guides students through theoretical formulation and practical calculation, integrating principles of mechanical engineering and physics focused on hovercraft design.
expand button
Transcribed Image Text:### Hovercraft Power Requirements #### a) Develop an equation for the required power input to the rotor of the hovercraft. Assume negligible internal change, potential energy change, flow work (e.g., pressure effects), and heat transfer. --- #### b) Calculate a numerical value for the required power input. --- ### Explanations: 1. **Equations for Power Input**: - When developing an equation for the power input, consider the principles of conservation of energy and the specific parameters and assumptions provided. - Negligible internal changes, potential energy changes, flow work, and heat transfer simplify the problem to focus primarily on the kinetic aspects and operational needs of the rotor. 2. **Numerical Calculation**: - Once the equation is established, substitute the relevant numerical values to estimate the actual power input required for the hovercraft's operations. This setup guides students through theoretical formulation and practical calculation, integrating principles of mechanical engineering and physics focused on hovercraft design.
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