2.1 Distribution of flow pulsation intensity along the normal direction
When the particle size in the oil is 5 μm, 15 μm, 25 μm, and 50 μm while the particle concentration is 0.65 ppm, 0.97 ppm, 3.00 ppm, 6.58 ppm and 14.40 ppm, the distribution curves of the flow pulsation intensity along the normal direction are shown in Fig. 2. The horizontal axes of the graphs show the ratio of the flow pulsation intensity to the fluid inlet velocity V0, and the ordinates represent the normal dimensionless pipe length.