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Numerical analysis of 3-D unsteady flow in a vaneless counter-rotating turbine

ZHAO Qingjun, WANG Huishe, ZHAO Xiaolu, XU Jianzhong

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 352-358 doi: 10.1007/s11708-007-0053-3

Abstract: To reveal the unsteady flow characteristics of a vaneless counter-rotating turbine (VCRT), a three-dimensional, viscous, unsteady computational fluid dynamics (CFD) analysis was performed.The results show that unsteady simulation is superior to steady simulation because more flow characteristicsThe unsteady effects in upstream airfoil rows are weaker than those in downstream airfoil rows in theThe deviation is very big between the direction of air flow at the outlet of a high pressure turbine

Keywords： unsteady flow     three-dimensional     pressure distribution     similar result     unsteady simulation    

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Measurement and analysis of tip clearance unsteady flow spectrum in axial-flow fan rotor

LIU Bo, HOU Weimin, MA Changyou, WANG Yangang, ZHOU Qiang

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 448-452 doi: 10.1007/s11708-008-0088-0

Abstract: The tip clearance unsteady flow development from the inlet to the outlet of an axial-flow rotor was revealedby analyzing pressure frequency spectrum acquired from measuring the unsteady pressure field of theThe experiment provides test basis for thoroughly understanding the tip clearance unsteady flow and buildinginteraction models of tip clearance flow and main flow.

Keywords： development     endwall     unsteady pressure     pressure measurement     experiment    

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Effects of radiation and heat source/sink on unsteady MHD boundary layer flow and heat transfer over

Krishnendu Bhattacharyya

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 376-384 doi: 10.1007/s11705-011-1121-0

Abstract: this paper, an investigation is made to study the effects of radiation and heat source/sink on the unsteadyboundary layer flow and heat transfer past a shrinking sheet with suction/injection.The flow is permeated by an externally applied magnetic field normal to the plane of flow.

Keywords： MHD boundary layer     unsteady flow     heat transfer     thermal radiation     heat source/sink     shrinking sheet     suction    

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URANS simulation of the turbulent flow in tight lattice bundle

Yiqi YU, Yanhua YANG

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 404-411 doi: 10.1007/s11708-011-0165-7

Abstract: The flow structure in tight lattice is still of great interest to nuclear industry.An accurate prediction of flow parameter in subchannels of tight lattice is likable.Unsteady Reynolds averaged Navier Stokes (URANS) is a promising approach to achieve this goal.In this paper, the turbulent flow with different Reynolds number (5000–215000) and different pitch-to-diameterIt is hoped that the present work will contribute to the understanding of these important flow phenomena

Keywords： tight rod bundle     flow structure     unsteady Reynolds averaged Navier Stokes (URANS)    

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Numerical analysis of aerodynamic noise radiated from cross flow fan

CHEN Anbang, LI Song, HUANG Dongtao

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 443-447 doi: 10.1007/s11708-008-0063-9

Abstract: The flow field in a cross flow fan was simulated by solving the 2-D unsteady Reynolds-averaged Navier-Stokes

Keywords： predicted aerodynamic     Williams-Hawkings     calculated pressure     aerodynamic performance     unsteady Reynolds-averaged    

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Study on wave rotor refrigerators

Yuqiang DAI, Dapeng HU, Meixia DING

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 83-87 doi: 10.1007/s11705-009-0075-y

Abstract: As a novel generation of a rotational gas wave machine, the wave rotor refrigerator (WRR) is an unsteadyflow device used for refrigeration, in whose passages pressured streams directly contact and exchangepaper, the working mechanism and refrigeration principle are investigated based on the one-dimensional unsteadyflow theory.

Keywords： wave rotor     refrigeration     unsteady flow theory     wave diagram    

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How far have we been? ―Summary of investigations on rotating cavity at IDG, RWTH Aachen University

Dieter BOHN, Jing REN,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 489-497 doi: 10.1007/s11708-009-0040-y

Abstract: The flow and heat transfer phenomena in those cavities should be investigated in order to minimize theBoth the experimental and numerical results show that the whole flow structure rotating slower than theThe flow passing the observation windows in the experimental and numerical results indicates the quiteThe computed sequences and periods of the vortex flow structure correspond closely with those observedFurthermore, the numerical analysis reveals a flow pattern changing between single pair, double pair,

Keywords： rotating cavity     buoyancy     unsteady flow    

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Study and Application of Steady Flow and Unsteady Flow Mathematical Model for Canal Networks

Zhang Mingliang,Shen Yongming

Strategic Study of CAE 2007, Volume 9, Issue 8,   Pages 92-96

Abstract:

Based on Preissmann implicit scheme for one-dimensional Saint-Venant Equation,  the mathematical model for one- dimensional river networks and canal networks is developed and the key issues on the model are expatiated particularly in this paper.  This model is applied to simulating the tree-type irrigation canal networks and complex looped canal networks.  The results of levels and flows and discharge distribution between the branches agree with the data from Adlul.  This model is a simple and practical tool for water resource regulation of irrigation canal networks and river networks.  These results show the application value of this model is to set up ecological numerical model of water quality in river networks and canal networks.

Keywords： Preissmann implicit scheme     canal networks and river networks     discharge distribution     water quality mode    

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of Rotor/Stator Interaction in Turbomachinery by Use of a Disturbance Vortex Method for Compressible Flow

Chen Maozhang,Peng Bo

Strategic Study of CAE 2000, Volume 2, Issue 2,   Pages 15-23

Abstract: This method has some obvious advantages in simulating unsteady flow in turbomachinery, such as understandable

To validate the computational method, the unsteady flows caused by rotor/stator interactionAnd unsteady velocity correlation parameters at several locations inside the passage were compared withsurface is expressed by an elliptic-type Laplace equation rather than a hyperbolic-type equation even the flowis unsteady and compressible.

Keywords： turbomachinery     rotor/stator interaction     disturbance vortex method     compressible flow     unsteady flow    

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Thermodynamic models and energy distribution of single-phase heated surface in a boiler under unsteady

Xiyan GUO, Yongping YANG

Frontiers in Energy 2011, Volume 5, Issue 1,   Pages 69-74 doi: 10.1007/s11708-010-0117-7

Abstract: A coal-fired power unit frequently operates under unsteady conditions; thus, in order to acquire scientific

Keywords： thermodynamic model     energy distribution     boiler     unsteady conditions    

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Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 297-306 doi: 10.1007/s11708-009-0010-4

Abstract: A computational method facilitating long-time and high-resolution unsteady vortical flows is developedBoth the velocity and pressure distribution of the flow field are calculated by integral formulationsThe effectiveness of the present method is examined by comparing the numerical results of unsteady separated

Keywords： unsteady vortical flows     fast vortex method     vortex shedding     rotational oscillation     thin cambered blade    

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Numerical study of internal flow field and flow passage improvement of an inlet particle separator

Florian PAOLI, Tong WANG

Frontiers in Energy 2011, Volume 5, Issue 4,   Pages 386-397 doi: 10.1007/s11708-011-0156-8

Abstract: By performing gas flow field numerical simulations for several inlet Reynolds numbers (from 2 × 10to 9 × 10 ) and byflow ratios (from 10% to 20%), the present study has proposed to improve the flowNo particle has been included in the gas flow for a -epsilon turbulence model.Then the flow passage improvement method has focused on the separation area.in this study has succeeded in designing a shape which enhances the flow behavior.

Keywords： streamlines     pressure losses     flow passage improvement     inlet particle separator (IPS)    

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The Following-observing Method for Substance Flow Analysis

Lu Zhongwu

Strategic Study of CAE 2006, Volume 8, Issue 1,   Pages 18-25

Abstract:

The fundamental argument set forth in the paper is that flow is the common feature of fluid flow andsubstance flow.(constant output of product), but also for unsteady substance flow (increasing or decreasing outputIntroducing the degree of unsteady-state, a set of basic equations for calculating the indexes of substanceof indexes of lead flow.

Keywords： methods of substance flow analysis     following-observing method for substance flow analysis     basic equationsfor substance flow analysis     degree of unsteadiness of substance flow    

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UPFC setting to avoid active power flow loop considering wind power uncertainty

Shenghu LI, Ting WANG

Frontiers in Energy 2023, Volume 17, Issue 1,   Pages 165-175 doi: 10.1007/s11708-020-0686-z

Abstract: The active power loop flow (APLF) may be caused by impropriate network configuration, impropriate parameterThe power flow controllers, e.g., the unified power flow controller (UPFC), may be the reason and thepaper, the critical existence condition of the APLF is newly integrated into the simultaneous power flowapproaching to the critical existing condition, the integrated power flow needs less iterations andBesides, with wind power fluctuation, the interval power flow (IPF) is introduced into the integrated

Keywords： active power loop flow (APLF)     unified power flow controller (UPFC)     wind power uncertainty     interval powerflow (IPF)    

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A novel flow electrode capacitive deionization device with spindle-shaped desalting chamber

Frontiers of Environmental Science & Engineering 2023, Volume 18, Issue 4, doi: 10.1007/s11783-024-1800-y

Abstract:

● A spindle-shaped influent chamber was designed and equipped in FCDI system.

Keywords： Spindle-shaped chamber     Desalination performance     Flow electrode capacitive deionization    

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Title Author Date Type Operation

Numerical analysis of 3-D unsteady flow in a vaneless counter-rotating turbine

ZHAO Qingjun, WANG Huishe, ZHAO Xiaolu, XU Jianzhong

Journal Article

Measurement and analysis of tip clearance unsteady flow spectrum in axial-flow fan rotor

LIU Bo, HOU Weimin, MA Changyou, WANG Yangang, ZHOU Qiang

Journal Article

Effects of radiation and heat source/sink on unsteady MHD boundary layer flow and heat transfer over

Krishnendu Bhattacharyya

Journal Article

URANS simulation of the turbulent flow in tight lattice bundle

Yiqi YU, Yanhua YANG

Journal Article

Numerical analysis of aerodynamic noise radiated from cross flow fan

CHEN Anbang, LI Song, HUANG Dongtao

Journal Article

Study on wave rotor refrigerators

Yuqiang DAI, Dapeng HU, Meixia DING

Journal Article

How far have we been? ―Summary of investigations on rotating cavity at IDG, RWTH Aachen University

Dieter BOHN, Jing REN,

Journal Article

Study and Application of Steady Flow and Unsteady Flow Mathematical Model for Canal Networks

Zhang Mingliang,Shen Yongming

Journal Article

of Rotor/Stator Interaction in Turbomachinery by Use of a Disturbance Vortex Method for Compressible Flow

Chen Maozhang,Peng Bo

Journal Article

Thermodynamic models and energy distribution of single-phase heated surface in a boiler under unsteady

Xiyan GUO, Yongping YANG

Journal Article

Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Journal Article

Numerical study of internal flow field and flow passage improvement of an inlet particle separator

Florian PAOLI, Tong WANG

Journal Article

The Following-observing Method for Substance Flow Analysis

Lu Zhongwu

Journal Article

UPFC setting to avoid active power flow loop considering wind power uncertainty

Shenghu LI, Ting WANG

Journal Article

A novel flow electrode capacitive deionization device with spindle-shaped desalting chamber

Journal Article