Investigation of flow pulsation characteristic in single-phase forced circulation under rolling motion

• Influence mechanism of flow pulsation amplitude is analyzed.
• Influence mechanism of flow pulsation period is analyzed.
• Boundary parameter of flow pulsation amplitude is analyzed.

The effect of additional inertial forces on the flow rate pulsation in rolling motion condition is theoretically and experimentally studied, and the essential influencing factors that affect the flow pulsation behavior are clarified. Both the theoretical and experimental results indicate that the relative pulsation amplitude of flow rate increases with the driving head increasing, however, it decreases with the increase of experimental loop friction resistance. Furthermore, the investigation results also indicate that the effect of additional inertial force can be neglected and the flow rate will not present significant pulsation when the intensity of driving force is 10 times larger than the additional inertial force. The pulsation intensity of flow rate in rolling motion condition depends on the relative quantity of driving head, friction resistance and additional inertial acceleration.