Experimental Investigations on the Inner Flow Behavior of Centrifugal Pumps under Inlet Air-Water Two-Phase Conditions
TypeArticles dans des revues avec comité de lecture
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. In the present paper, experimental overall pump performance tests were performed for two different rotational speeds and several inlet air void fractions (αi) up to pump shut-off condition. Visualizations were also performed on the flow patterns of a whole impeller passage and the volute tongue area to physically understand pump performance degradation. The results showed that liquid flow modification does not follow head modification as described by affinity laws, which are only valid for homogeneous bubbly flow regimes. Three-dimensional effects were more pronounced when inlet void fraction increased up to 3%. Bubbly flow with low mean velocities were observed close to the volute tongue for all αi, and returned back to the impeller blade passages. The starting point of pump break down was related to a strong inward reverse flow that occurred in the vicinity of the shroud gap between the impeller and volute tongue area.
Files in this item
Showing items related by title, author, creator and subject.
Investigation on centrifugal pump performance degradation under air-water inlet two-phase flow conditions SI, Qiaorui; CUI, Qianglei; ZHANG, Keyu; YUAN, Jianping; BOIS, Gérard (EDP Sciences, 2018)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 ...
Experimental and numerical studies on flow characteristics of centrifugal pump under air-water inflow SI, Qiaorui; HE, Wenting; BOIS, Gérard; CUI, Qianglei; YUAN, Shouqui; ZHANG, Keyu (International Journal of Fluid Machinery and Systems, 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 ...
SI, Qiaorui; YUAN, Shouqi; YUAN, Jianping; BOIS, Gérard (SAGE Publications, 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, ...
Air-water two-phase flow experimental and numerical analysis in a low specific speed centrifugal pump SI, 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 Investigation on a Centrifugal Pump under Air-Water Two-Phase Flow Condition SI, Qiaorui; BOIS, Gérard; ZHANG, Keyu; YUAN, Shouqui (Springer, 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 ...