Results 71 to 80 of about 742,255 (143)

Correlation analysis between energy loss and vortex dynamics during transient operation of mixed-flow pumps

Results in Engineering
To clarify the relationship between energy loss and vortex dynamics in mixed-flow pumps under transient operating conditions, a multiscale analytical framework integrating delayed detached-eddy simulation (DDES), entropy-generation theory, and reduced ...
Jin Ye, Wei Li, Leilei Ji, Ramesh Agarwal   +3 more
doaj   +1 more source

Active Control of Tip Leakage Vortex using DBD Plasma Actuators

, 2021
In a turbomachine rotor, the gap between the rotor tip and the stationary casing creates tip-leakage vortices. These vortices act like a blockage to the incoming passage flow and effectively reduce the pressure ratio across the rotor stage, cause ...
Anzalotta, Christian
core  

Effects of cutback squealer tips on the vortices and local loss in the tip region of axial turbine rotor

Propulsion and Energy
Tip leakage loss is a significant source of aerodynamic loss in the turbine rotor and can be controlled by using a cavity tip. In this paper, three configurations with cutback rims are numerically investigated to control the formation and development of ...
Weihao Zhang, Yufan Wang, Kailai Chen, Dongming Huang   +3 more
doaj   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

Flow control mechanisms of partially porous blade tip on tip leakage vortex in pump-jet propulsor

Large eddy simulation coupled with a porous medium model and a sliding mesh technique was employed to investigate the flow control mechanism of partially porous blade tips in a pump-jet propulsor (PJP).
Zhiyuan Yang, Shengyao Ge, Yu Sun, Huan Ping, Qinmin Tan, Jiangtao Cui   +5 more
core   +1 more source

Study on tip leakage vortex cavitating flows using a visualization method

, 2018
Experimental investigations of unsteady cavitating flows in a hydrofoil tip leakage region with different gap sizes are conducted to highlight the development of gap cavitation. The experiments were taken in a closed cavitation tunnel, during which high-
Yutong Jiang, Guoyu Wang, Xiaolong Cao, Yu Zhao   +3 more
core   +1 more source

Fast-moving Mesh Method and Its Application to Circumferential Non-uniform Tip Clearance in a Single-stage Turbine [PDF]

Journal of Applied Fluid Mechanics
The circumferential non-uniform tip clearance (CNTC) due to casing out-of-roundness adversely affects the turbine aerodynamic performance due to machining and assembly errors, thermal deformation, and improper active clearance control (ACC), etc ...
Y. Zheng, X. B. Jin, H. Yang
doaj   +1 more source

PIV-Based Analysis of Internal Flow Evolution and Coherent Structures in a Semi-Open Axial Flow Fan

Machines
The internal flow of a semi-open axial flow fan is highly three-dimensional and unsteady due to the absence of a confined passage. The evolution of complex vortical structures, such as the tip leakage vortex (TLV) and corner separation vortex (CSV ...
Bin Li, Jun Wang, Qianhao Xiao, Yougen Huang   +3 more
doaj   +1 more source

Experimental Study on Evolution of Cavitation Flow Structure in Hump Region of Waterjet Pump [PDF]

Journal of Applied Fluid Mechanics
The waterjet propulsor is a new type of marine propulsion system, which offers the advantages of high speed, good maneuverability, and low vibration and noise.
Y. Long, Z. Zhou, J. Zhong, H. Han
doaj   +1 more source

Study of Energy Loss Characteristics of a Shaft Tubular Pump Device Based on the Entropy Production Method. [PDF]

Entropy (Basel), 2023
Ji D, Lu W, Xu B, Xu L, Lu L.
europepmc   +1 more source