Publication de 6 numéros par an
ISSN Imprimer: 2152-5102
ISSN En ligne: 2152-5110
Indexed in
EFFECTS OF VISCOSITY ON TRANSIENT BEHAVIOR OF A LOW SPECIFIC SPEED CENTRIFUGAL PUMP IN STARTING AND STOPPING PERIODS
RÉSUMÉ
Low specific speed centrifugal pumps have been extensively applied in petroleum, petro-chemical, and other industrial sectors to transport liquids in a variety of viscosity. Their transient performance during starting and stopping processes can be important for their operational reliability; however, this performance has not been tackled under pumping highly viscous oils conditions so far. In the article, the transient turbulent flows in a low specific speed centrifugal pump are simulated with CFD code in starting and stopping periods for three liquids. The effects of viscosity on instant performance parameters, head-flow rate curves, instant internal flow variables, and flow structures in the impeller and volute are demonstrated. The parameter synchronization characteristic, hysteresis phenomenon in head-flow rate curves, and pump affinity law modification are addressed. It is turn out that a highly viscous liquid can respond to the pump speed change more quick than water, but is subject to a more significant overshoot in the shaft-power curve; thus, a liquid with higher viscosity than water potentially can reduce the operational reliability of a low specific speed centrifugal pump during the starting period.
-
Zhang Yu-Liang, Zhu Zu-Chao, Li Wen-Guang, Jia Xiao-Qi, Non-inertial stopping characteristics of a prototype pump, Advances in Mechanical Engineering, 11, 4, 2019. Crossref
-
Cao Weidong, Jia Zhixiang, Zhang Qiqi, Near-Wall Flow Characteristics of a Centrifugal Impeller with Low Specific Speed, Processes, 7, 8, 2019. Crossref
-
Zhang Yu-Liang, Ji Ying-Yu, Zhao Yan-Juan, Deep analysis of the transient behavior of centrifugal pumps during startup and shutdown, Measurement and Control, 55, 3-4, 2022. Crossref
-
Chen Xiaoping, Zhang Xiaoming, Li Xiaojun, Evolution Characteristics of Energy Change Field in a Centrifugal Pump during Rapid Starting Period, Energies, 15, 22, 2022. Crossref