leak Test validation of formulas Last Post 28 Jan 2013 04:16 PM by Niel. 1 Replies.
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bonll

New Member
Posts:9

 28 Jan 2013 12:46 PM Below is a an equation to calculate mass that will leak away at an allowable rate in 10 sec's this answer needs validation as well as the one below so I would appreciate ones help. Thanks P := 14.7∙psi Q := 4.5•10¯2 •cc/sec Q := 1.59•10¯6 •ft³/sec t := 10•sec T := 519•R R := 10.73•(ft³•psi)/(R•lbmol) V :=Q•t V := 1.59•10¯5• ft³ ....is this true? N:=(P•V)/(R•T) N:=4.197∙10¯8∙LBMOL ....is this true? also Chamber conditions: P := 14.7∙psi + 6.4 ∙psi P := 21.1 V:= .030865•ft³ R:= 10.73∙ (ft3∙psi)/(R∙lbmol) T:= 519•R Calculate the mass of air in the chamber: N:=(P•V)/(R•T) N:=1.16945∙10¯4∙LBMOL ..........is this true? Thanks for any help.
Niel

Basic Member
Posts:193

 28 Jan 2013 04:16 PM One of us is making an error in unit conversion I convert 4.5e-2 cc/sec to 1.59e- 6 cuft/sec. The conversion used is 30.48 cm/ft - 28317 cc/cuft or 3.53e-5 cuft/cc I did not check farther. Niel Leon engineering.com