Study on Torque Converter with Adjustable Guide Vanes of Hydrodynamic Speed-Adjusting Wind Turbines

2012 ◽  
Vol 605-607 ◽  
pp. 453-457
Author(s):  
Wei Cai ◽  
Wen Xing Ma ◽  
Chun Bao Liu ◽  
Wei Wei Du
Keyword(s):  
Wind Turbine ◽  
Three Dimensional ◽  
Flow Simulation ◽  
Simulation Method ◽  
Torque Converter ◽  
Transmission System ◽  
Variable Speed ◽  
Core Component ◽  
Three Dimensional Flow ◽  
Guide Vanes

As the core component of hydrodynamic variable speed transmission system of wind turbine, there exist some problems in domestic adjustable torque converter, such as simple products and poor performances. A three-dimensional flow simulation method is employed to design the adjustable torque converter. Circulatory circle is determined after the structure optimization of the torque converter. The blades are designed by the conformal projection law, and then the adjustable device’s structure is determined. The performance of torque converter with the variation guide vanes is analyzed by using numerical simulation. The calculated results show that the new torque converter could meet the needs of the wind turbine transmission system.

Three-Dimensional Flow Simulation Research on Spur Dike

2013 ◽  
Vol 405-408 ◽  
pp. 799-802
Author(s):  
Hui Xu ◽  
Ming Zhang ◽  
Wan Qi Zhang
Keyword(s):  
Three Dimensional ◽  
Vertical Plane ◽  
Flow Simulation ◽  
Free Water ◽  
Three Dimensional Flow ◽  
Simulation Research ◽  
Spur Dike ◽  
Additional Layer ◽  
Large Coefficient ◽  
Coefficient Method

A three-dimensional (3D) flow mathematical model has been applied to simulate the flow field around spur dikes. In the vertical plane, the z-coordinate was adopted, and the additional layer was used to track the free water surface. The standard k-ε model was adopted, additionally, wall function and large coefficient method was applied to treat the boundary of the spur dike. Simulated results of velocity distribution, turbulent kinetic energy and its dissipation rate around the spur dike agree well with the experimental data.

Three dimensional flow simulation over a sharp-crested V-Notch weir

2020 ◽  
Vol 71 ◽  
pp. 101684 ◽  
Author(s):  
Hamid Saadatnejadgharahassanlou ◽  
Rasoul Ilkhanipour Zeynali ◽  
Amin Gharehbaghi ◽  
Saeid Mehdizadeh ◽  
Babak Vaheddoost
Keyword(s):  
Three Dimensional ◽  
Flow Simulation ◽  
Three Dimensional Flow ◽  
Dimensional Flow

Analysis of the Full Flow Field of Torque Converter

2012 ◽  
Vol 468-471 ◽  
pp. 674-677 ◽  
Author(s):  
Yu Long Lei ◽  
Chang Wang ◽  
Zheng Jie Liu ◽  
Xing Zhong Li
Keyword(s):  
Flow Field ◽  
Boundary Conditions ◽  
Flow Rate ◽  
Flow Model ◽  
Three Dimensional ◽  
Calculated Data ◽  
Torque Converter ◽  
Three Dimensional Flow ◽  
Sliding Mesh ◽  
Mesh Method

Establish the full three-dimensional flow model of the torque converter, proper mesh the model, select the appropriate boundary conditions, and use the sliding mesh method to deal with the interactions of the impeller, turbine, and reactor in different rotation speeds. Analysis the flow rate, pressure, and the loss of full flow field passage of the torque converter, elaborate the formation mechanism of the flow field, agreement with the experimental date compare to the calculated data, more accurate than the traditional single passage model compare to the full passage model, provide the direction of design optimization of the torque converter.

Three-dimensional flow field around and downstream of a subscale model rotating vertical axis wind turbine

2016 ◽  
Vol 57 (3) ◽  
Author(s):  
Kevin J. Ryan ◽  
Filippo Coletti ◽  
Christopher J. Elkins ◽  
John O. Dabiri ◽  
John K. Eaton
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Three Dimensional ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Three Dimensional Flow ◽  
Dimensional Flow

Analysis of Complex Three-Dimensional Flow in a Three-Stage LP Turbine by Means of Transitional Navier-Stokes Simulation

2000 ◽  
Author(s):  
Jochen Gier ◽  
Sabine Ardey ◽  
Adam Heisler
Keyword(s):  
Flow Field ◽  
Three Dimensional ◽  
Flow Simulation ◽  
Navier Stokes ◽  
Flow Visualisation ◽  
Three Dimensional Flow ◽  
Dimensional Flow ◽  
Lp Turbine ◽  
Extensive Experimental Data ◽  
Highly Loaded

The complex three-dimensional flow field in a highly loaded three-stage LPT is analysed on the basis of a steady three-dimensional flow simulation. The quality of the simulation concerning this configuration is demonstrated by means of a comparison with extensive experimental data gathered in a turbine test rig. For an accurate representation of the transitional character of the turbine flow a modified version of the Abu-Ghannam Shaw transition model is employed in the TRACE_S Navier-Stokes code in connection with a two-equation turbulence model. The flow field of this highly loaded turbine is characterised by complex secondary flow pattern as well as local separation and reattachment zones. The need and applicability of transition modelling is demonstrated by a comparison with a fully turbulent calculation and experimental flow visualisation. The basic flow structure is described in terms of several characteristic quantities and discussed in detail. For further analysis variations of the point of operation and the geometry also based on experiments are included in this investigation.

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