Results 11 to 20 of about 117 (105)

Study on the Tip Leakage Loss Mechanism of a Compressor Cascade Using the Enhanced Delay Detached Eddy Simulation Method [PDF]

Entropy
The leakage flow has a significant impact on the aerodynamic losses and efficiency of the compressor. This paper investigates the loss mechanism in the tip region based on a high-load cantilevered stator cascade.
Shiyan Lin, Ruiyu Li, Limin Gao
doaj   +2 more sources

Investigation of Tip Leakage Vortex Structure and Trajectory in a Centrifugal Pump with a New Omega Vortex Identification Method

Applied Sciences, 2022
Semi-open centrifugal pumps are widely used in various fields. However, the tip leakage vortex (TLV) has a malign effect on the impeller flow field.
Bing Qian, Yinhui Cai, Qiang Ding, Daoli Zhao, Weipeng Sun, Like Wang   +5 more
doaj   +1 more source

Flow characteristics of tip leakage vortex cavitation ofducted propeller under different cavitation conditions

Zhongguo Jianchuan Yanjiu, 2023
ObjectivesThis study aims to investigate the effects of the development of tip leakage vortex (TLV) cavitations on the core characteristics of vortices. MethodsThe numerical simulation associated with the SST k-ω turbulence model and Zwart-Gerber-Belamri
Shun XU, Qi LIU, Yicheng ZHANG, Junxin WANG, Yongliang XIONG   +4 more
doaj   +1 more source

Active Flow Control for Passage Vortex Reduction in a Linear Turbine Cascade with Various Tip Clearance Sizes Using a Dielectric Barrier Discharge Plasma Actuator

Aerospace, 2023
In an axial-flow turbine of a jet engine used for aircraft propulsion, the passage vortex (PV) and tip leakage vortex (TLV) generated inside the blade passage deteriorate the aerodynamic performance.
Takayuki Matsunuma, Takehiko Segawa
doaj   +1 more source

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

International Journal of Aerospace Engineering, Volume 2023, Issue 1, 2023., 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. In this paper, two transonic rotors with a high pressure ratio are selected to study the tip flow, one of which has one normal shock wave at the blade tip and the other has
Xinlong Ye, Zhenggui Zhou, Dakun Sun
wiley   +1 more source

Large-Eddy Simulation of Cavitating Tip Leakage Vortex Structures and Dynamics around a NACA0009 Hydrofoil

Journal of Marine Science and Engineering, 2021
The tip leakage vortex (TLV) has aroused great concern for turbomachine performance, stability and noise generation as well as cavitation erosion. To better understand structures and dynamics of the TLV, large-eddy simulation (LES) is coupled with a ...
Linlin Geng, Desheng Zhang, Jian Chen, Xavier Escaler   +3 more
doaj   +1 more source

Effects of Tip Clearance Size on Energy Performance and Pressure Fluctuation of a Tidal Propeller Turbine

Energies, 2020
Unavoidable tip clearance between blade tip and casing shroud plays an important role in the performance and characteristics of a tidal propeller turbine.
Bao Ngoc Tran, Haechang Jeong, Jun-Ho Kim, Jin-Soon Park, Changjo Yang   +4 more
doaj   +1 more source

Numerical Investigation of Gas-Liquid Flow in a Multiphase Pump with Special Emphasis on the Effect of Tip Leakage Vortex on the Gas Flow Pattern

Journal of Marine Science and Engineering, 2022
In this paper, the gas-liquid flow is comprehensively analyzed under different inlet gas void fractions, and the effect of tip leakage vortex (TLV) on the gas flow pattern in multiphase pumps is revealed.
Yexiang Xiao, Zhonghua Gui, Xuesong Li, Zekui Shu, Guangtai Shi, Chunwei Gu   +5 more
doaj   +1 more source

Research on Cavitation Flow Dynamics and Entropy Generation Analysis in an Axial Flow Pump

Journal of Sensors, Volume 2022, Issue 1, 2022., 2022
The entropy generation theory is introduced to investigate the effects of different NPSH and tip clearance size on the cavitation flow dynamics and mechanical energy dissipation intuitively and quantitatively within an axial flow pump through numerical simulations. The results indicate that main mechanical energy dissipation of the pump gathers in part
Simin Shen, Bensheng Huang, Si Huang, Shun Xu, Shufeng Liu, Haidong Shao   +5 more
wiley   +1 more source

Numerical Research of the Submerged High‐Pressure Cavitation Water Jet Based on the RANS‐LES Hybrid Model

Shock and Vibration, Volume 2021, Issue 1, 2021., 2021
The submerged high‐pressure water jet has the characteristics of high velocity, strong turbulence, and severe cavitation. In order to reveal the formation mechanism of shear cavitation in the submerged high‐pressure water jet and to grasp the turbulent structure and velocity distribution characteristics in the jet, the prediction ability of different ...
Yongfei Yang, Weidong Shi, Linwei Tan, Wei Li, Songping Chen, Bo Pan, Trupti Ranjan Lenka   +6 more
wiley   +1 more source