NPTurbulentFlameLengthEPSolnME525SP2011

NPTurbulentFlameLengthEPSolnME525SP2011 - Example Problem:...

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Example Problem: Flame Lengths for Turbulent Nonpremixed Jet Flames Calculate the flame lengths for two turbulent jet flames, one where the jet fluid is pure H 2 and the other where the jet fluid is 50 mole % H 2 and 50 mol % N 2 . The jet exit diameter is 10 mm. The uniform jet exit velocity is 100 m/s for both jets. The co-flow fluid is air and the initial temperature for both the co-flow and jet fluids is 300 K. The pressure is 1 bar. Solution: Basic Equations: 3/2 1/4 1/2 e stoich f fj e f Tgd T     v Fr where 2 10 0.01 100 / 300 9.8 / j f stoich e d jet exit diameter mm T flame temperature rise f stoich mixture fraction uniform exit velocity m s TK gm s   v  * 1/2 * 1/2 * / f stoich f stoich j je e jj Lf L d d d momentum diameter d   2/5 * 1/5 2 * 13.5 5 10 . 0 7 23 5 f f f f Fr o r F r Fr o r F r  
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For the H 2 diffusion flame, the stoichiometric mixture is given by   
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This note was uploaded on 12/27/2011 for the course ME 525 taught by Professor Lucth during the Fall '11 term at Purdue University-West Lafayette.

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NPTurbulentFlameLengthEPSolnME525SP2011 - Example Problem:...

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