Numerical Simulation of Fog Flow along the Inlet Duct of Gas Turbine Engine
Abstract
Computational fluid dynamic analysis of inlet duct fogging system was carried out to understand the characteristics flow of nozzles spray along the air inlet duct channel of Alstom GT13E2 gas turbine, the numerical work is validated using wind tunnel experimental data of previous study. Flow resistance on the nozzle were studied and flow field motion evaluated. The results obtained have shown that, fogging spray possess significant effects on mass flow rate due to transfer of heat of evaporation caused by air to the liquid droplets in the inlet duct which greatly influence the performance of the compressor and turbine output. An adequately space between the nozzles array and compressor bell mouth produces mass flow rate evaporation ability up to 87.63% and temperature difference drop by 6˚C. Moreover, on the examination of the air flow resistance on the fogging system, the spray velocity, injection angle and the characteristics order of the of nozzles layout have revealing influence on the pressure drop. The pressure distribution becomes uniformly and squarely distributed when positioned at least 2.0m away from the nozzle array, it is our desire that the findings would be of added benefit to the gas turbine engine designers.
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