Investigation on centrifugal pump performance degradation under air-water inlet two-phase flow conditions
Article dans une revue avec comité de lecture
In order to study the flow characteristics of centrifugal pumps when transporting the gas-liquid mixture, water and air were chosen as the working medium. Both numerical simulation and experimental tests were conducted on a centrifugal pump under different conditions of inlet air volume fraction (IAVF). The calculation used URANS k-epsilon turbulence model combined with the Euler-Euler inhomogeneous two-phase model. The air distribution and velocity streamline inside the impeller were obtained to discuss the flow characteristics of the pump. The results shows that air concentration is high at the inlet pressure side of the blade, where the vortex will exist, indicating that the gas concentration have a great relationship with the vortex aggregation in the impeller passages. In the experimental works, pump performance were measured at different IAVF and compared with numerical results. Contributions to the centrifugal pump performance degradations were analyzed under different air-water inlet flow condition such as IAVF, bubble size, inlet pressure. Results show that pump performance degradation is more pronounced for low flow rates compared to high flow rates. Finally, pressure pulsation and vibration experiments of the pump model under different IAVF were also conducted. Inlet and outlet transient pressure signals under four IAVF were investigated and pressure pulsation frequency of the monitors is near the blade passing frequency at different IAVF, and when IAVF increased, the lower frequency signal are more and more obvious. Vibration signals at five measuring points were also obtained under different IAVF for various flow rates.
Fichier(s) constituant cette publication
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
Air-water two-phase flow experimental and numerical analysis in a low specific speed centrifugal pump Communication avec acteSI, Qiaorui; BOIS, Gérard; ZHANG, Keyu; YUAN, Jianping (European Turbomachinery Society, 2017)The paper presents experimental and numerical investigations performed on a single stage, single-suction, horizontal-orientated centrifugal pump in air-water two-phase non condensable flow conditions. Experimental test ...
Experimental and numerical studies on flow characteristics of centrifugal pump under air-water inflow Article dans une revue avec comité de lectureSI, Qiaorui; HE, Wenting; BOIS, Gérard; CUI, Qianglei; YUAN, Shouqui; ZHANG, Keyu (Korean Society for Fluid Machinery, 2019)A two-phase liquid pumping test ring is built to study the flow induced characteristics of centrifugal pump under the air-water flow working condition. Pump performances are measured under different flow rates and different ...
Experimental Investigations on the Inner Flow Behavior of Centrifugal Pumps under Inlet Air-Water Two-Phase Conditions Article dans une revue avec comité de lectureSI, Qiaorui; ZHANG, Haoyang; BOIS, Gérard; ZHANG, Jinfeng; CUI, Qianglei; YUAN, Shouqi (MDPI, 2019)Centrifugal pumps are widely used and are known to be sensitive to inlet air-water two-phase flow conditions. The pump performance degradation mainly depends on the changes in the two-phase flow behavior inside the pump. ...
Experimental and Numerical Investigation on a Centrifugal Pump under Air-Water Two-Phase Flow Condition Article dans une revue avec comité de lectureSI, Qiaorui; BOIS, Gérard; ZHANG, Keyu; YUAN, Shouqui (Elsevier, 2009)Experimental and numerical investigations have been performed on a single stage, single-suction, horizontal-orientated centrifugal pump under air-water two-phase non condensable flow conditions. Experimental test loop ...
Article dans une revue avec comité de lectureSI, Qiaorui; YUAN, Shouqi; YUAN, Jianping; BOIS, Gérard (Sage Journals, 2016)To reduce radial noises from the motor of centrifugal pumps, this study designed a water cooling system called jettingequipment to replace traditional fan cooling systems in pump motors. By measuring radiated noises, head, ...