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example 14-1 - Example 14-1 Air enters a diffuser at a...

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Example 14-1 Air enters a diffuser at a volumetric flow rate of 697 cfm (ft 3 /min), a pressure of 40 psia, and a density of 0.2 lbm/ft 3 . The air exits at 101°F. Using areas on the figure and assuming variable specific heat, find a) the inlet temperature b) the exit velocity c) the exit pressure Solution: a) The specific volume is 3 1 1 3 1 1 f 5 lbm lbm 0.2 ft v ρ = = = t = o 1 temperature(air, 40, 5) 80.2 F T P v = = = b) From the first law 2 2 1 2 1 2 2 2 h h + = + V V
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