Abstract— The parameters affecting particle injection in a high pressure powder fuel injection system were verified by using computational particle fluid dynamics (CPFD). The particles were coal ( =175 μm, ρs = 1350 kg/m3), and the simulation was performed by changing the clearance between the roller and the hose and by changing the total pressure drop. Also, the wall erosion of the hose was confirmed by changing the clearance. As the clearance decreases from 10 mm to 1 mm when the total pressure difference is 10 bar, it is confirmed that the injection of the particles is increased two-fold, but the power of the motor should be increased to 1.45 times. When the clearance is 5mm, as the total pressure drop is increased from 10 bar to 30 bar, the particle injection rate decreases 0.33-fold, but the motor power must be increased 3-fold. Also, it was confirmed that the wall erosion of the hose was large when the clearance was 7 mm or more.
Keywords— Dry solid feeding, high pressure, simulation, Clearance, Backflow.
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