A very small needle valve is used to control the flow of air in a (frac{1}{8})-in. air

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A very small needle valve is used to control the flow of air in a \(\frac{1}{8}\)-in. air line. The valve has a pressure drop of \(4.0 \mathrm{psi}\) at a flow rate of \(0.005 \mathrm{ft}^{3} / \mathrm{s}\) of \(60{ }^{\circ} \mathrm{F}\) air. Tests are performed on a large, geometrically similar valve and the results are used to predict the performance of the smaller valve. How many times larger can the model valve be if \(60^{\circ} \mathrm{F}\) water is used in the test and the water flow rate is limited to \(7.0 \mathrm{gal} / \mathrm{min}\) ?

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Munson Young And Okiishi's Fundamentals Of Fluid Mechanics

ISBN: 9781119080701

8th Edition

Authors: Philip M. Gerhart, Andrew L. Gerhart, John I. Hochstein

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