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[Sponsors] |
August 7, 2008, 23:10 |
spray angle calculation
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#1 |
Guest
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Hi...
In the Huh's model, spray angle is calculated automatically. There is equations about spray angle in the methodology. but nothing about the time scale of wave growth(Tau w). I cannot get the exact spray angle. anyone give me hint?? plz thanks~ |
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August 13, 2008, 11:34 |
Re: spray angle calculation
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#2 |
Guest
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In Huh's atomization model you have:
Atomization-time-scale = C3 * Turbulent-time-scale + C4 * Wave-growth-time-scale. This latter is computed as ((ro*ro_fuel/(ro+ro_fuel)^2)*(cd/Lw)^2-sigma_f/((ro+ro_fuel)*Lw^3))^(-0.5) where ro = density (air has no subscript), cd = fluid velocity at injector outlet, Lw = C1/C2 * Turbulent-legth-scale(time varying...!). I think it's pretty complicated to have all the data to verify the code computation...if you want I can give you values of costant C1,2,3,4... Bye Andrea |
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