Calculate the speed of the tip of a 67m blade on a horizontal axis wind turbine rotating at 20 revolutions per minute. Express your answer as a Mach number, i.e., the fraction of the speed of sound (340 m/s). Do not give units. Answer:

Calculate the speed of the tip of a 67m blade on a horizontal axis wind turbine rotating at 20 revolutions per minute. Express your answer as a Mach number, i.e., the fraction of the speed of sound (340 m/s). Do not give units. Answer:

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter9: Mass And Mass-related Variables In Engineering

Section: Chapter Questions

Problem 10P

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Concept explainers

Open Channel Flow

Open channel flow is a branch of fluid mechanics. It deals with the flow of fluid in an open conduit or free surface. In an open channel flow, gravity induces the flow of water whose surface is open to the air. This flow is free-falling rather than confined in rigid body conduits. The open channel flow depends upon two parameters that are the cross-section of the conduit and the velocity profile. Practical examples of open channel flow are streams, rivers, canals, and other drainage systems.In open channel flow, the cross-sectional area of at least one of the sides is exposed to air, and the surface of water faces atmospheric pressure. This flow is also known as free gravity flow. The cross-sectional area of the conduit can be either man-made or a natural channel. For instance, the flow in rivers and streams are natural conduits, and the flow in a canal and sanitary systems are man-made or engineered channels.

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Calculate the speed of the tip of a 67m blade on a horizontal axis wind turbine rotating at 20 revolutions per minute.
Express your answer as a Mach number, i.e., the fraction of the speed of sound (340 m/s). Do not give units.
Answer:

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