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5_37 - 5.37 A variable mesh screen produces a linear...

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Unformatted text preview: 5.37 A variable mesh screen produces a linear and (,0an Val-m Va'iable mesh ween axisymmetric velocity profile as indicated in Fig. P537 in 2227 the air flow through a 2-ft—diameter circular cross—sectional . duct. The static pressures upstream and downstream of the screen are 0.2 and 0.15 psi and are uniformly distributed 7' over the flow cross-sectional—area. Neglecting the force . 37‘8”“de tile duct W311 0“ the flowmg 311': calculate the WI] I/I/t/I/I/I/Il/If/fl”II/liltiflllflli’w/IIJMJ C“ n ' . ‘ ’ S lee rag OI‘CC Section (1) Section (2) 1:, =02 psi ()2 = 015 psi v‘ c 100 (Us l FlGURE P5.37 APP/icafian of fire axial cornpmenf of #16 ”near momem‘km eguafi'm 7‘0 fire 790w #fl'flujh flu: Cam‘ra/ Ira/«me Shaun m 1%: fire *c/n lead: 7‘0 R 7% value of am may Eco obtained from cameiwfi‘m ofmqss as fa/kzws R 2 {0‘6 7:79, =¢(umaxk)2firdr 0 . 7;) _ 2 £45 6(de ’ m. = 3.. V; =: 3 Ma fl7=/50 1’} R2 2 ‘ Z. s g (4er dr 0 FM”: %.1 K = flows/u (/0091;er /_/é___ -mmway fairway? LL X {72—3 5/u_9,_ {1‘ #3 + 0'2 L13 7T (2“)//‘H‘In).{¢ns/£ M224)! 144m.1 .1 4 l. [/7, 5'42 ...
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