Experimental Investigation and Numerical Validation of a Roots Pump’s Performance Operating with Gas-Liquid Mixtures

Processes, Journal Year: 2024, Volume and Issue: 12(9), P. 1918 - 1918

Published: Sept. 6, 2024

To facilitate the high operating pressure of a novel underwater power cycle, potential Roots pumps for pressurizing gas-liquid mixtures is experimentally investigated in this paper. The experimental facility constructed, and effects inlet gas volume fractions rotational speeds on pump performance are discussed. results show that increased fraction beneficial to increasing efficiency. This associated with ratio mixture compressibility. In addition, increases speed liquid phase negatively affect pump’s These phenomena caused by resulting difference subsequently back-flow from outlet, thereby gap leakage decreasing numerical model further compared against resultsk maximum found be less than 7.53%. paper tests mixtures.

Language: Английский

Identification of the vortex in the main flow passage of a multiphase pump and the relationship with pressure fluctuation

Energy Science & Engineering, Journal Year: 2024, Volume and Issue: 12(10), P. 4394 - 4413

Published: Sept. 24, 2024

Abstract This article investigates the evolution of vortex structures in impeller channel a multiphase pump. By capturing vortices using vorticity and Q ‐criterion, generation location is analyzed, pressure fluctuations induced by main flow passage are studied terms their time‐ frequency‐domain characteristics. The relationship between amplitude at frequency further investigated. study develops method identifying pump, reveals intrinsic connection passage. These findings offer some suggestions for eliminating influence enhancing pressurizing capabilities pumps.

Language: Английский

Examination on behavior of tip leakage flow in a three-stage gas-liquid two-phase flow pump

Journal of Hydrodynamics, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 8, 2024

Language: Английский