|
|
|
|
|
Bing Qian, Yinhui Cai, Qiang Ding, Daoli Zhao, Weipeng Sun and Like Wang
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. The structure and trajectory of a TLV under different discharge conditions were simulated and are discuss...
ver más
|
|
|
|
|
|
|
|
|
|
|
Shiyan Lin, Ruiyu Li, Limin Gao and Ning Ge
The accurate prediction of tip leakage flow is the premise for flow mechanism analysis and compressor performance optimization. The detached eddy simulation (DES) method, which compromises cost and accuracy, has excellent potential for a high Reynolds fl...
ver más
|
|
|
|
|
|
|
|
|
|
|
Michael Mansour and Dominique Thévenin
This paper aims to summarize the results of several experimental investigations regarding two-phase liquid?gas flows in radial centrifugal pumps. The main objective is to combine the corresponding experimental results and collect the obtained knowledge t...
ver más
|
|
|
|
|
|
|
|
|
|
|
Julien Marty and Cédric Uribe
The present study focuses on the impact of the underlying RANS turbulence model in the Zonal Detached Eddy Simulation (ZDES) method when used for secondary flow prediction. This is carried out in light of three issues commonly investigated for hybrid RAN...
ver más
|
|
|
|
|
|
|
|
|
|
|
Ji-Tao Qiu, Chen-Jun Yang, Xiao-Qian Dong, Zong-Long Wang, Wei Li and Francis Noblesse
Unsteady Reynolds-averaged Navier?Stokes simulations of an axial-flow pump for waterjet propulsion are carried out at model scale, and the numerical uncertainties are analyzed mainly according to the procedure recommended by the twenty-eighth Internation...
ver más
|
|
|
|
|
|
|
|
|
|
|
Marhamat Zeinali, Sarallah Abbasi, Abolfazl Hajizadeh Aghdam
Pág. 288 - 295
Commencement and development processes of unsteadiness, caused by blade row tip leakage flow in a low speed axial compressor, are investigated and results are presented in this paper. Analyses are based on results obtained through numerical simulation of...
ver más
|
|
|
|
|
|
|
|
|
|
|
Alessandro Corsini, Anthony G. Sheard
Pág. 3 - 16
The paper presents a design procedure for anti-vortex end-plates that are fitted to tip limited blades of the subsonic axial fans utilised in compact cooling units. The authors study the impact of tip leakage vortex bursting on the performance of the stu...
ver más
|
|
|
|
|
|
|
|
|
|
|
Haigang Wen, Luyao Li, Guangtai Shi, Haijun Ma and Xiaodong Peng
A spiral axial-flow blade pump (SABP), as the core piece of equipment in the oil and natural gas closed-gathering and transportation process, can not only transport gas?liquid mixtures with a high gas content, but can also transport gas?liquid?solid mixt...
ver más
|
|
|
|
|
|
|
|
|
|
|
Takayuki Matsunuma and Takehiko Segawa
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. In this study, a dielectric barrier discharge plasma a...
ver más
|
|
|
|
|
|
|
|
|
|
|
Xavier Flete, Nicolas Binder, Yannick Bousquet and Sandrine Cros
In the current study, full-stage unsteady simulations were performed to investigate rotating instability inception mechanisms in a particularly large tip clearance centrifugal compressor with a vaneless diffuser and a volute. Four operating points along ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Haigang Wen, Wenjuan Lv and Guangtai Shi
A spiral axial-flow blade pump (SABP) is an indispensable device in the closed gathering and transporting technology of oil and natural gas exploitation; it can not only transport a gas?liquid mixture with a high gas content, but also transport a gas?liq...
ver más
|
|
|
|
|
|
|
|
|
|
|
Youngkuk Yoon and Seung Jin Song
Cavitation instabilities can induce axial and circumferential vibrations, as well as noise in turbopump inducers. Therefore, the purpose of the present study is to investigate the mechanism of cavitation instability. The flow field near the two-bladed in...
ver más
|
|
|
|
|
|
|
|
|
|
|
Joseph Moubogha Moubogha, Gabriel Margalida, Pierric Joseph, Olivier Roussette and Antoine Dazin
Stall and surge are strong limitations in the operating range of compressors and thus one of the major limits of jet engine performance. A promising way to push the stability limit of compression machines is to inject a small amount of flow at the blade ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Gábor Daku and János Vad
This paper presents a critical overview on worst-case design scenarios for which low-speed axial flow fans may exhibit an increased risk of blade resonance due to profile vortex shedding. To set up a design example, a circular-arc-cambered plate of 8% re...
ver más
|
|
|
|
|
|
|
|
|
|
|
Hongmei Jiang, Xu Peng, Wenbo Xie, Shaopeng Lu and Yongmin Gu
The high-speed Over-Tip-Leakage (OTL) flow has a significant impact on the aerodynamic performance of the High-Pressure Turbine (HPT) passage and generates high thermal load for the blade tip. Different tip sealing and cooling design strategies are appli...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yexiang Xiao, Zhonghua Gui, Xuesong Li, Zekui Shu, Guangtai Shi and Chunwei Gu
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. The results show that the gas flow pattern in an ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yanzhao Wu, Xiaohang Wang, Xiaolong Yang, Junfeng Ding, Di Zhu, Ran Tao, Huanmao Wang and Ruofu Xiao
Tubular turbine is a type of turbine with low-head. Due to the fact that the runner of a tubular turbine is of axial-flow type, there will be a certain width of blade tip between the blade and the chamber. In order to explore the influence of tip clearan...
ver más
|
|
|
|
|
|
|
|
|
|
|
Hu Zhang, Jun Wang, Desheng Zhang, Weidong Shi and Jianbo Zang
To understand the effect of cavitation on the tip leakage vortex (TLV), turbulent cavitating flows were numerically investigated using the shear-stress transport (SST) k?? turbulence model and the Zwart?Gerber?Belamri cavitation model. In this work, two ...
ver más
|
|
|
|
|
|
|
|
|
|
|
David Lamidel, Guillaume Daviller, Michel Roger and Hélène Posson
A Large-Eddy Simulation of the tip leakage flow of a single airfoil is carried out. The configuration consists of a non-rotating, isolated airfoil between two horizontal plates with a gap of 10 mm between the tip of the airfoil and the lower plate. The M...
ver más
|
|
|
|
|
|
|
|
|
|
|
Maximilian Passmann, Stefan aus der Wiesche and Franz Joos
This paper presents a focusing schlieren system designed for the investigation of transonic turbine tip-leakage flows. In the first part, the functional principle and the design of the system are presented. Major design considerations and necessary trade...
ver más
|
|
|
|
|
|