The influence of the structure of rotor cage bottom plates on the flow-field performance of O-Sepa classifier

2011 ◽  
Author(s):  
Dazhi Jiang ◽  
Junlan Sun
Keyword(s):  
Flow Field ◽  
Field Performance ◽  
Rotor Cage

Numerical and Experimental Investigation of Return Channel Vane Aerodynamics With Two-Dimensional and Three-Dimensional Vanes

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
A. Hildebrandt ◽  
F. Schilling
Keyword(s):  
Experimental Investigation ◽  
Flow Field ◽  
Static Pressure ◽  
Three Dimensional ◽  
Pressure Rise ◽  
Field Performance ◽  
Two Dimensional ◽  
Flow Angle ◽  
Overall Performance ◽  
Return Channel

The present paper deals with the numerical and experimental investigation of the effect of return channel (RCH) dimensions of a centrifugal compressor stage on the aerodynamic performance. Three different return channel stages were investigated, two stages comprising three-dimensional (3D) return channel blades and one stage comprising two-dimensional (2D) RCH vanes. The analysis was performed regarding both the investigation of overall performance (stage efficiency, RCH total pressure loss coefficient) and detailed flow-field performance. For detailed experimental flow-field investigation at the stage exit, six circumferentially traversed three-hole probes were positioned downstream the return channel exit in order to get two-dimensional flow-field information. Additionally, static pressure wall measurements were taken at the hub and shroud pressure and suction side (SS) of the 2D and 3D return channel blades. The return channel system overall performance was calculated by measurements of the circumferentially averaged 1D flow field downstream the diffuser exit and downstream the stage exit. Dependent on the type of return channel blade, the numerical and experimental results show a significant effect on the flow field overall and detail performance. In general, satisfactory agreement between computational fluid dynamics (CFD)-prediction and test-rig measurements was achieved regarding overall and flow-field performance. In comparison with the measurements, the CFD-calculated stage performance (efficiency and pressure rise coefficient) of all the 3D-RCH stages was slightly overpredicted. Very good agreement between CFD and measurement results was found for the static pressure distribution on the RCH wall surfaces while small CFD-deviations occur in the measured flow angle at the stage exit, dependent on the turbulence model selected.

Numerical and Experimental Investigation of Return Channel Vane Aerodynamics With 2D and 3D Vanes

2016 ◽  
Author(s):  
A. Hildebrandt ◽  
F. Schilling
Keyword(s):  
Experimental Investigation ◽  
Flow Field ◽  
Static Pressure ◽  
Pressure Rise ◽  
Field Performance ◽  
Two Dimensional ◽  
Flow Angle ◽  
Overall Performance ◽  
Return Channel ◽  
2D And 3D

The present paper deals with the numerical and experimental investigation of the effect of return channel dimensions of a centrifugal compressor stage on the aerodynamic performance. Three different return channel stages were investigated, two stages comprising 3D (three-dimensional) return channel blades and one stage comprising (2D) two-dimensional RCH (Return Channel) vanes. The analysis was performed regarding both the investigation of overall performance (stage efficiency, RCH total pressure loss coefficient) and detailed flow field performance. For detailed experimental flow field investigation at the stage exit, six circumferentially traversed three-hole probes were positioned downstream the return channel exit in order to get two-dimensional flow field information. Additionally, static pressure wall measurements were taken at the hub and shroud pressure and suction side of the 2D and 3D return channel blades. The return channel system overall performance was calculated by measurements of the circumferentially averaged 1D flow field downstream the diffuser exit and downstream the stage exit. Dependent on the type of return channel blade, the numerical and experimental results show a significant effect on the flow field overall and detail performance. In general, satisfactory agreement between CFD-prediction and test-rig measurements was achieved regarding overall and flow field performance. In comparison with the measurements, the CFD calculated stage performance (efficiency and pressure rise coefficient) of all 3D-RCH stages was slightly over-predicted. Very good agreement between CFD and measurement results was found for the static pressure distribution on the RCH wall surfaces while small CFD-deviations occur in the measured flow angle at the stage exit, dependent on the turbulence model selected.

scholarly journals Relativity Research of Total Pressure and Regulating Valve in Continuous Wind Tunnel and Its Application

2020 ◽  
Vol 38 (2) ◽  
pp. 325-332
Author(s):  
Dan Chen ◽  
Xiaosong Yang ◽  
Gang Li ◽  
Shouchun Guo ◽  
Tianyi Chen
Keyword(s):  
Wind Tunnel ◽  
Flow Field ◽  
Total Pressure ◽  
Position Control ◽  
Flow Characteristics ◽  
Field Performance ◽  
Pressure Control ◽  
Static Test ◽  
Polar Curve ◽  
Transonic Wind Tunnel

As the main adjusting means of the total pressure for the continuous transonic wind tunnel, the characteristics of regulating valve directly affect the flow field performance of the wind tunnel, therefore, it is important to analyze and establish the correlation between the regulating valve and the total pressure, and it is necessary to select the appropriate regulating valve and its combination accordingly. Firstly, in terms of the pressure regulation principle of the wind tunnel pressure regulating system, combining with the flow characteristics of the regulating valve, the correlation between the position control of the regulating valve and the total pressure control of the wind tunnel is established, then the static test is conducted to verify the relationship. In order to shorten the flow field stability time under the negative pressure of 0.6m continuous transonic wind tunnel, based on the established theory, the valve system is optimized and reformed, and the blowing test is carried out. The results show that the time of optimized Mach number polar curve decreases by 40%~50%, which greatly improves the test efficiency, which further proves that the present analysis is correct and effective, and can provide reference for the design of pressure regulating system in continuous transonic wind tunnel.

scholarly journals Numerical Simulation of a Flow Field in a Turbo Air Classifier and Optimization of the Process Parameters

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 237 ◽  
Author(s):  
Yun Zeng ◽  
Si Zhang ◽  
Yang Zhou ◽  
Meiqiu Li
Keyword(s):  
Flow Field ◽  
Process Parameters ◽  
Production Efficiency ◽  
Rapid Development ◽  
Engineering Application ◽  
Production Equipment ◽  
Powder Materials ◽  
Optimal Process ◽  
Air Classifier ◽  
Rotor Cage

Due to the rapid development of powder technology around the world, powder materials are being widely used in various fields, including metallurgy, the chemical industry, and petroleum. The turbo air classifier, as a powder production equipment, is one of the most important mechanical facilities in the industry today. In order to investigate the production efficiency of ultrafine powder and improve the classification performance in a turbo air classifier, two process parameters were optimized by analyzing the influence of the rotor cage speed and air velocity on the flow field. Numerical simulations using the ANSYS-Fluent Software, as well as material classification experiments, were implemented to verify the optimal process parameters. The simulation results provide many optimal process parameters. Several sets of the optimal process parameters were selected, and the product particle size distribution was used as the inspection index to conduct a material grading experiment. The experimental results demonstrate that the process parameters of the turbo air classifier with better classification efficiency for the products of barite and iron-ore powder were an 1800 rpm rotor cage speed and 8 m/s air inlet velocity. This research study provides theoretical guidance and engineering application value for air classifiers.

Research on the influence of contraction curve on the flow field performance of Laval nozzle

2021 ◽  
Author(s):  
Zhihao Shi ◽  
Peikun Liu ◽  
Yuekan Zhang ◽  
Xiaoyu Li ◽  
Lanyue Jiang
Keyword(s):  
Flow Field ◽  
Laval Nozzle ◽  
Field Performance

scholarly journals Effect of Turning Angle on Flow Field Performance of Linear Bowed Stator in Compressor at Low Mach Number

2006 ◽  
Vol 19 (4) ◽  
pp. 271-277 ◽  
Author(s):  
Yong-jun ZHANG ◽  
Fu CHEN ◽  
Guo-tai FENG ◽  
Jie-xian SU
Keyword(s):  
Mach Number ◽  
Flow Field ◽  
Field Performance ◽  
Turning Angle ◽  
Low Mach Number

Numerical investigation of effects of inner cone on flow field, performance and erosion rate of cyclone separators

2018 ◽  
Vol 201 ◽  
pp. 223-237 ◽  
Author(s):  
Farzad Parvaz ◽  
Seyyed Hossein Hosseini ◽  
Khairy Elsayed ◽  
Goodarz Ahmadi
Keyword(s):  
Flow Field ◽  
Numerical Investigation ◽  
Erosion Rate ◽  
Field Performance

scholarly journals A New Rotor-Type Dynamic Classifier: Structural Optimization and Industrial Applications

Processes ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 1033
Author(s):  
Fangchao Jia ◽  
Xinliang Mou ◽  
Ying Fang ◽  
Chuanwen Chen
Keyword(s):  
Flow Field ◽  
Radial Velocity ◽  
Tangential Velocity ◽  
Operating Conditions ◽  
Bottom Surface ◽  
Cone Type ◽  
Surface Diameter ◽  
Rotor Cage ◽  
Rotor Type ◽  
Classification Efficiency

Due to the inadequate pre-dispersion and high dust concentration in the grading zone of the turbo air classifier, a new rotor-type dynamic classifier with air and material entering from the bottom was designed. The effect of the rotor cage structure and diversion cone size on the flow field and classification performance of the laboratory-scale classifier was comparatively analyzed by numerical simulation using ANSYS-Fluent. The grinding process performance with an industrial classifier was also tested on-site. The results revealed that an inverted cone-type rotor cage is more suitable for the under-feed classifier. When the rotor cage’s top-surface diameter to bottom-surface diameter ratio was too large or too small, the radial velocity and tangential velocity at the outer surface of the rotor cage greatly fluctuated. Furthermore, the diameter of the diversion cone also affected the axial velocity and radial velocity of the flow field. Models T-C(1-0.8) and T-D(1-0.7) were determined as the best rotor cage structures. Under stable operating conditions, the classification efficiency of the industrial classifier was 87% and the sharpness of separation was 0.58, which meet the industrial requirements for classification efficiency and energy consumption. This present study provides theoretical guidance and engineering application value for air classifiers.

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