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CHARACTERISTIC OF VORTEX IN A MIXING LAYER FORMED AT NOZZLE PITZDAILY USING OPENFOAM

Suheni and Syamsuri
Department of Mechanical Engineering, Adhi Tama Institute of Technology Surabaya, Indonesia
E-Mail: [email protected]

ABSTRACT
PitzDaily nozzle was the most substantial component in a gas turbine. This nozzle was used to mix air with
propane. In the application value of turbulence and vortex center was very important for this type of nozzle. Reynolds number was a parameter used to see its effect on the value of turbulence and vortex center. The method applied was a numerical simulation by using OpenFOAM. This simulation was performed to determine the distribution of pressure,streamline, turbulence, and vortex center. The study was conducted by varying Reynolds numbers 12210, 50000, and 100000. Grid independent test was made to validate with the results of previous research. By this simulation results indicated that this method was feasible and the solver was highly accurate. The results showed that the higher the value of Reynolds number, the further away of vortex center rear nozzle. The mark of turbulence and vortex length were also increased. In addition to that the larger the value of this then the mixture of air and propane formed a fine grained, so it
became more perfect combustion.

Keywords: nozzle pitzdaily, openFOAM, variation of reynolds number.

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