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.