Thermodynamics filled in class notes_Part_135

Thermodynamics filled in class notes_Part_135 - 7.2....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 7.2. ADIABATIC, ISOCHORIC KINETICS 277 0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.2 0.4 0.6 0.8 1.0 1.2 1.4 * 1 Figure 7.14: 1 versus for ignition problem. For our system with = 20 and q = 10, we estimate the dimensionless ignition time as i = exp 20 (20)(10) = 2 . 42583 10 6 . (7.359) This is a surprisingly good estimate, given the complexity of the problem. Recall the nu- merical solution showed ignition for 2 . 7 10 6 . In terms of dimensional time, ignition time prediction becomes t i = exp a q , (7.360) = 1 a parenleftbigg RT o E parenrightbigg parenleftBigg c v T o h o T o ,A h o T o ,B parenrightBigg exp parenleftbigg E RT o parenrightbigg . (7.361) Note the ignition is suppressed if the ignition time is lengthened, which happens when he activation energy E is increased, since the exponential sensitivity is stronger than the algebraic sensitivity, the energy of combustion ( h o T o ,A h o T o ,B ) is decreased because it takes longer to react...
View Full Document

This note was uploaded on 11/26/2011 for the course EGN 3381 taught by Professor Park-sou during the Fall '11 term at FSU.

Page1 / 2

Thermodynamics filled in class notes_Part_135 - 7.2....

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online