Analysis and Control Optimization of Square-off Centrifugal Cascading Fluid Disturbances
- 1CNNC No.7 Research & Design Institute Co., Ltd, Taiyuan 030032, China
Abstract
The Square-off centrifugal cascade constitutes an important component of a flexible cascade. In practical engineering operation，during the propagation of fluid disturbances generated by the cascade，the feed pressure at the depleted-end units exceeds the operational limit. To enhance the disturbance resistance of the lean-end units in a stepped centrifugal cascade，static and dynamic hydraulic methods were employed to investigate the impact of the critical parameter α value of the electric control valve on the cascade fluid state. Results indicate that pressure disturbance fluctuations propagate to both sides of the cascade. After re-establishing steady-state conditions，these fluctuations primarily affect the separation stage on the rich-side of the disturbed stage. Similarly，pressure fluctuations caused by flow disturbances propagate to both sides of the cascade，primarily impacting the separation stage on the lean-side of the disturbed stage upon re-establishing steady-state conditions. The value of α affects the cascade's disturbance resistance capability. Through fluid disturbance hydrodynamic analysis，it was found that when α is set to 0，1，or 2 for each separation stage，the disturbance has a relatively minor impact on the system's final steady-state conditions. With α set to 3 and 4，respectively，when the feed flow rate is increased by 5%，the relative changes in the feed pressure and the depleted-stream pressure at the depleted-end separating stage decrease from 6.02% to 1.96% and from 2.66% to 0.25%，respectively; while those at the enriched-end separating stage decrease from 5.48% to 0.47% and from 2.17% to 0.14%，respectively. Dynamic analysis of pressure fluctuations caused by pressure or flow disturbances in the cascade revealed that，using the largest unit in the cascade as the boundary，setting α=0 or 1 for the separation stage on the rich-side and a=2 for the separation stage on the lean-side minimizes the impact of pressure fluctuations on each separation stage. Under a 5% increase in feed flow rate disturbance，the relative changes of the feed pressure at the depleted-end separating stage decreases from 6.49% to 4.78% and 4.92%; under the disturbance of unit bypass closure，it decreases from 11.97% to 1.46% and 1.56%. These findings provide reference for setting electric control valve parameters in practical stepped centrifugal cascades.
Related
- Simulation of centrifugal separation of particles with equal sedimentation velocities
- BAHAMAS: A Control Plane for Optimization and Execution of Variational Quantum Circuits
- Hybrid Quantum-Classical Optimization for Emergency-Priority Traffic Signal Control
- A Theory of Nested Cascading in Directed Logic
- Visualizing surface-reaction-driven chloride migration and cascading failure in sulfide solid electrolytes
BibTeX
@article{wang2026analysis,
title = {{Analysis and Control Optimization of Square-off Centrifugal Cascading Fluid Disturbances}},
author = {Shanggong WANG and Hao YAN and Jun CHE and Sheng LIU and Haiyan WU},
journal = {Journal of Isotopes},
year = {2026},
month = oct,
doi = {10.7538/tws.2026.youxian.023},
url = {https://doi.org/10.7538/tws.2026.youxian.023},
note = {CC BY-NC-ND},
}
RIS
TY - JOUR
TI - Analysis and Control Optimization of Square-off Centrifugal Cascading Fluid Disturbances
AU - Shanggong WANG
AU - Hao YAN
AU - Jun CHE
AU - Sheng LIU
AU - Haiyan WU
PY - 2026
DA - 2026/10/26
JO - Journal of Isotopes
DO - 10.7538/tws.2026.youxian.023
UR - https://doi.org/10.7538/tws.2026.youxian.023
AB - The Square-off centrifugal cascade constitutes an important component of a flexible cascade. In practical engineering operation，during the propagation of fluid disturbances generated by the cascade，the feed pressure at the depleted-end units exceeds the operational limit. To enhance the disturbance resistance of the lean-end units in a stepped centrifugal cascade，static and dynamic hydraulic methods were employed to investigate the impact of the critical parameter α value of the electric control valve on the cascade fluid state. Results indicate that pressure disturbance fluctuations propagate to both sides of the cascade. After re-establishing steady-state conditions，these fluctuations primarily affect the separation stage on the rich-side of the disturbed stage. Similarly，pressure fluctuations caused by flow disturbances propagate to both sides of the cascade，primarily impacting the separation stage on the lean-side of the disturbed stage upon re-establishing steady-state conditions. The value of α affects the cascade's disturbance resistance capability. Through fluid disturbance hydrodynamic analysis，it was found that when α is set to 0，1，or 2 for each separation stage，the disturbance has a relatively minor impact on the system's final steady-state conditions. With α set to 3 and 4，respectively，when the feed flow rate is increased by 5%，the relative changes in the feed pressure and the depleted-stream pressure at the depleted-end separating stage decrease from 6.02% to 1.96% and from 2.66% to 0.25%，respectively; while those at the enriched-end separating stage decrease from 5.48% to 0.47% and from 2.17% to 0.14%，respectively. Dynamic analysis of pressure fluctuations caused by pressure or flow disturbances in the cascade revealed that，using the largest unit in the cascade as the boundary，setting α=0 or 1 for the separation stage on the rich-side and a=2 for the separation stage on the lean-side minimizes the impact of pressure fluctuations on each separation stage. Under a 5% increase in feed flow rate disturbance，the relative changes of the feed pressure at the depleted-end separating stage decreases from 6.49% to 4.78% and 4.92%; under the disturbance of unit bypass closure，it decreases from 11.97% to 1.46% and 1.56%. These findings provide reference for setting electric control valve parameters in practical stepped centrifugal cascades.
SN - 1000-7512
ER -