Results 31 to 40 of about 26,676 (308)

Influence factors and prediction model of enstrophy dissipation from the tip leakage vortex in a multiphase pump

Scientific Reports, 2022
In a multiphase pump, tip clearance is the required distance between the blade tip and the pump body wall of the impeller, forming tip leakage vortex (TLV), causing unstable flow and energy dissipation.
Zekui Shu, Guangtai Shi, Xin Yao, Guodong Sun, Sijia Tao   +4 more
doaj   +1 more source

Film cooling characteristics of squealer tip of a turbine blade

Xibei Gongye Daxue Xuebao
The high-speed and high-temperature gap leakage flow in the turbine blade tip clearance directly scours the tip of the rotor blade and generates a local high-temperature region, so the active and passive control of the gap leakage flow is very important.
WU Fangfang, XU Weijiang, LIU Cunliang, SHI Jingyin, YU Zeyu   +4 more
doaj   +1 more source

Influences of Tip Cooling Injection on Tip Clearance Control at Design and Off-Design Incidences

International Journal of Rotating Machinery, 2009
A numerical investigation has been performed to study the influences of cooling injection from the blade tip surface on controlling tip clearance flow in an unshrouded, high-turning axial turbine cascade.
Maosheng Niu, Shusheng Zang
doaj   +1 more source

An Optical Fiber Bundle Sensor for Tip Clearance and Tip Timing Measurements in a Turbine Rig

Sensors, 2013
When it comes to measuring blade-tip clearance or blade-tip timing in turbines, reflective intensity-modulated optical fiber sensors overcome several traditional limitations of capacitive, inductive or discharging probe sensors.
María Asunción Illarramendi, Gotzon Aldabaldetreku, Joseba Zubia, Josu Beloki, Iker García, Felipe Jiménez   +5 more
doaj   +1 more source

Investigation on the Mechanism of Blade Tip Recess Improving the Aerodynamic Performance of Transonic Axial Flow Compressor

Journal of Applied Fluid Mechanics, 2021
The development of high-performance aero engines put forward higher performance requirements for compressor components, and the improvement of aerodynamic performance of compressors has important engineering application value.
S. Yan, W. L. Chu, W. Liu, Y. Li, J. Yang, W. Zhao   +5 more
doaj  

Blade Loading Effects on Axial Turbine Tip Leakage Vortex Dynamics and Loss [PDF]

, 2012
umerical simulations have been carried out to define the loss generation mechanisms associated with tip leakage in un-shrouded axial turbines. Tip clearance vortex dynamics are a dominant feature of two mechanisms important in determining this loss: (i ...
Clemens, E. F., Gegg, S. G., Greitzer, Edward M., Huang, Arthur C., Tan, Choon S., Turner, E. R.   +5 more
core   +1 more source

Visualized observations of trajectory and dynamics of unsteady tip cloud cavitating vortices in axial flow pump

Journal of Fluid Science and Technology, 2017
A large-scale perpendicular cavitating vortices (PCVs), at the trailing edge of attached cavitation on the blade suction side near the tip region, has been found recently due to the great impact on performance breakdown in an axial waterjet pump. However,
Lei SHI, Desheng ZHANG, Ruijie ZHAO, Weidong SHI, B.P.M. (Bart) van ESCH   +4 more
doaj   +1 more source

Low‐Angle Grain Boundaries and Re‐Segregation in Single‐Crystalline Ni‐Base Superalloys

Advanced Engineering Materials, EarlyView.
This work demonstrates that Re‐segregation at low‐angle grain boundaries (LAGBs) in Ni‐base superalloys is influenced by misorientation angle. Advanced microscopy and atom probe tomography reveal that higher misorientation angles increases Re‐segregation.
Alireza B. Parsa, Aparna Saksena, Alesander Kostka, Pascal Thome, Felicitas Scholz, Alexandre Mussi, Christoph Somsen, Baptiste Gault, Jan Frenzel, Gunther Eggeler   +9 more
wiley   +1 more source

Effects of the Shock Wave Structure on the Tip Clearance Leakage Flow in Transonic Compressor Rotors

International Journal of Aerospace Engineering, 2023
The interaction between shock waves and the tip clearance flow in a transonic compressor rotor has important effects on the tip clearance flow and the rotor aerodynamic performance.
Xinlong Ye, Zhenggui Zhou
doaj   +1 more source

Analysis of Tip Clearance Effect on the Transportation Characteristics of a Multiphase Rotodynamic Pump Based on the Non-Uniform Bubble Model

Fluids, 2022
The multiphase rotodynamic pump is widely used in petroleum and gas exploitation, and blade tip clearance may cause flow instability and performance deterioration.
Weihua Sun, Zhiyi Yu, Ke Zhang, Zheng Liu   +3 more
doaj   +1 more source