Chapt06

For further details see ref 30 example 621 we want to

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Unformatted text preview: igures. The proper nozzle diameter is d Part (c) D 89 mm Ans. (b) For the venturi nozzle, use Eq. (6.136) or Fig. 6.42. The iterative sequence is 1 0.5, Cd1 0.977, 1 1.009, 2 0.445, Cd2 0.9807, 2 1.0004, 3 0.447 We have converged to three figures. The proper venturi diameter is | v v d | e-Text Main Menu | D 89 mm Textbook Table of Contents | Study Guide Ans. (c) 404 Chapter 6 Viscous Flow in Ducts These meters are of similar size, but their head losses are not the same. From Fig. 6.43 for the three different shapes we may read the three K factors and compute hm,orifice 3.5 m hm,nozzle 3.6 m hm,venturi 0.8 m The venturi loss is only about 22 percent of the orifice and nozzle losses. Solution EES The iteration encountered in this example is ideal for the EES. Input the data in SI units: Rho 1000 Nu 1.02E-6 D 0.2 V 2.0 DeltaP 50000 Then write out the basic formulas for Reynolds number, throat velocity and flow coefficient: Re V D/Nu Vt V/Beta 2 Cd/(1-Beta 4) 0.5 Alpha Vt Alpha SQRT(2 Delt...
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This note was uploaded on 10/27/2009 for the course MAE 101a taught by Professor Sakar during the Spring '08 term at UCSD.

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