Novel bionic humpback whale blade for suppressing cavitation in a centrifugal pump

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(4)

Published: April 1, 2025

Cavitation results in increased losses, reduced performance, and blade damage, which seriously affects the safe stable operation of centrifugal pumps. This study introduces a novel bionic design aimed at inhibiting cavitation based on humpback whale's bumpy tubercles. The investigates impact geometric parameters cavitation, pressure, vortex distribution. Furthermore, losses inside impeller are analyzed using entropy generation theory. research findings indicate that compared to original model, exhibits superior with highest efficiency head achieved when amplitude is 0.08 times outlet width. by 4.4% 2.7%, respectively. structure changes flow state leading edge, reduction near shroud, decrease low pressure region surface blade, substantial increase reaching 13.6%. Moreover, disappearance suction inhibits high regions. As result, vapor volume total significantly 38% 37.4%, respectively, under severe conditions.

Language: Английский

Advances in Flow Control Methods for Pump-Stall Suppression: Passive and Active Approaches

Energies, Journal Year: 2024, Volume and Issue: 17(23), P. 6157 - 6157

Published: Dec. 6, 2024

This article provides a comprehensive review of key approaches to suppressing stall flow in pumps, offering insights enhance pump performance and reliability. It begins by outlining the formation mechanisms characteristics stalls, followed an in-depth analysis various types. The discussion highlights passive active control methods, emphasizing their roles phenomena. Passive flow-control strategies, including surface roughness, grooves, obstacles, fixed guide vanes, vortex generators, are examined with focus on effectiveness stall. Similarly, techniques, such as jets adjustable explored for capacity regulate field suppress novelty this lies its exploration methods stall, action underlying principles formation. findings reveal that appropriate measures can mitigate laminar separation reduce losses associated However, careful attention must be given optimal arrangement devices. Finally, limitations current implementations combined while into future potential advanced technologies regard

Language: Английский

Optimized impeller hydraulic performance of submersible drainage pumps: An experimental study

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(12)

Published: Dec. 1, 2024

Optimizing the hydraulic efficiency of submersible drainage pumps (SDPs) is crucial for energy conservation and performance enhancement, especially in emergency applications. Therefore, this study aims to develop an energy-efficient SDP by designing optimized impeller model using a numerical scheme introducing flow balance block (FBB) as alternative modifying pump casing, thereby reducing internal space improving performance. Experimental validation FBB was conducted comparing their with original model. The results demonstrated that increased 3.35% at rate 0.195 m3/min, overall average improvement 2.33%. Additionally, when were combined, pump's further enhanced 5%, approximately 10%. also proposed tap bolt method more effective installing than silicone attaching method. This research provides comprehensive experimental approach offers valuable insights future optimization.

Language: Английский