MAE155A_HW3B_soln

# MAE155A_HW3B_soln - Hw3b mae155a 4.11 Ideal gas Vol:=.288 m...

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T 273.15 21 + () K := σ 6.895 10 8 × Pa = σ 10 5 psi := 4.12 That matches the book answer, for the wrong gas! ρ Vol 1.16 kg = ρ 4.029 kg m 3 = ρ M w_he R Press T := Density M w_he 4 := Helium ρ Vol 8.123 kg = ρ 28.203 kg m 3 = ρ Mw R Press T := Density Mw 28 := R 1.9857 cal gm K := Molecular weight Gas constant Press 349.976 psi = T 273.15 15 + K := Press 2413 10 3 Pa := Vol .288 m 3 := 4.11 Ideal gas Hw3b mae155a

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From http://www.psi-pci.com/Technical_Paper_Library/AIAA2002-4349%20Astrolink%20Pres.pdf For COPV tank Mass sphere 0.787 kg = Mass sphere 1.5 Press Vol σ ⋅ρ ti := 4 π Diameter tank 2 2 thickness ti 0.787 kg = thickness 1.458 mm = thickness Press Diameter tank 4 σ := ρ ti 4.54 gm cm 3 := Tank mass 4 3 π Diameter tank 2 3 0.00385 m 3 = Diameter tank 0.194 m = Diameter tank 1 π () 3 6 Vol π 2 1 3 := Diameter ρ Vol 130.256 gm = ρ 33.833 kg m 3 = ρ M w_he R Press T := Press 2.068 10 7 × Pa = Press 3000 psi := Vol .00385 m 3 :=
m p 1.584 10 3 × kg = m p m i 1e Δ V gI sp2

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MAE155A_HW3B_soln - Hw3b mae155a 4.11 Ideal gas Vol:=.288 m...

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