Chapt06

Dimensional analysis of a flat walled or conical

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Unformatted text preview: general, performance decreases with blockage and is approximately the same for both flat-walled and conical diffusers, as shown in Table 6.6. In all cases, the best conical diffuser is 10 to 80 percent longer than the best flat-walled design. Therefore, if length is limited in the design, the flatwalled design will give the better performance. The experimental design of a diffuser is an excellent example of a successful attempt to minimize the undesirable effects of adverse pressure gradient and flow separation. Table 6.6 Maximum DiffuserPerformance Data [14] Inlet blockage Bt | v v 0.02 0.04 0.06 0.08 0.10 0.12 | e-Text Main Menu Flat-walled —— ———————— Cp,max L/W1 0.86 0.80 0.75 0.70 0.66 0.63 | 18 18 19 20 18 16 Conical —— — — — — —— — — — Cp,max L/d 0.83 0.78 0.74 0.71 0.68 0.65 Textbook Table of Contents 20 22 24 26 28 30 | Study Guide 6.10 Fluid Meters AS = 1.0 Mat = 0.2 Bt = 0.08 ReDh = 279,000 385 Flat 5 Transitory stall boundary 4.5 Cp...
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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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