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http://dx.doi.org/10.5855/ENERGY.2013.22.4.413

A study on the exhaust gas recirculation in a MILD combustion furnace by using a Venturi nozzle  

Ha, Ji Soo (Environmental Science Department, Keimyung University)
Shim, Sung Hoon (Korea Institute of Machinery & Materials)
Publication Information
Journal of Energy Engineering / v.22, no.4, 2013 , pp. 413-419 More about this Journal
Abstract
The present study used the MILD combustor, which has coaxial cylindrical tube. The outside tube of the MILD combustor corresponds to the exhaust gas passage and the inner side tube is the furnace passage. A numerical analysis was accomplished to elucidate the characteristics of exhaust gas entrainment toward the inner furnace with the changes of venturi nozzle geometrical parameters, nozzle position, nozzle gap between high pressure air nozzle and venturi nozzle, and with the change of high pressure nozzle inlet velocity. The entrainment flow rate for the case with the high pressure air nozzle attached at the exhaust gas wall has relatively small change with the change of nozzle gap. That for the case with the high pressure air nozzle exposed to the exhaust gas has monotonically increase with the change of nozzle gap. The flow rate ratio of entrainment flow rate has considerably increase tendency with relatively lower air inlet velocity, on the other hand, that with relatively higher air inlet velocity could be seen relatively small increase.
Keywords
MILD combustion; venturi nozzle; nozzle gap; high pressure air inlet velocity; exhaust gas entrainment; entrainment flow rate ratio;
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Times Cited By KSCI : 3  (Citation Analysis)
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