<![CDATA[This research was conducted to determine the effect of inlet channel number on the spray characteristics of the pressure swirl atomizer using numerical methods. The observed spray characteristics were spray cone angle and discharge coefficient. Pressure swirl atomizer is a nozzle that can atomize fluid using vortex fluid in the mixing chamber, the magnitude of the vortex fluid is affected by the tangential velocity component of fluid at the nozzle inlet. Number of nozzle inlet was varied at 1, 2 and 4 channel. Total surface area of the inlet was kept constant of 1.76 mm 2 for all variation. The fluid used in this study were diesel and Reynolds number was varying at 2000, 2500, 3000, 3500 and 4000. The result show that with the increasing of inlet channel number at a fixed Reynolds number will generate spray with larger spray cone angle. This is due to tangential velocity compunentand swirling flow in mixing chamber increasewith the increasity of inlet channel number. This phenomena ruselt higher spray cone angle. Discharge coefficient also increase with the increasity of inlet channel number. This conditionshow that losses inside nozzle with 4 inlet channel number is smaller than that with less inlet channel number.Keywords: Pressure swirl atomizer, Spray characteristics, Amount of inlet channel, Numerical method.]]>
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