Research on Characteristics of Flow Field Inside Tangential Inlet Cyclone Separator by Orthogonal Design Method

2012 ◽  
Vol 516-517 ◽  
pp. 992-996
Author(s):  
Yi Gang Luan ◽  
Peng Fei Liu ◽  
Hai Ou Sun
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Design Method ◽  
Orthogonal Design ◽  
Research Result ◽  
Test Method ◽  
Cyclone Separator ◽  
Orthogonal Design Method ◽  
Tangential Inlet ◽  
Simulation Scheme

The flow field inside cyclone separator is a kind of complex three-dimensional rotation turbulent flow with two-phase separation phenomenon. In order to optimize the structure and shorten the cycle of research and development, it is very essential to find the appropriate calculation method for the flow field inside cyclone separator. In this article, the internal flow field of tangential inlet cyclone separator was simulated and calculated by adopting different calculation model and different numerical simulation scheme by orthogonal design method. And the result was compared with that of existing experiment to find a reasonable method for the simulation of the flow field inside the cyclone. On the basis of standard k-ε model, the numerical simulation scheme was formulated by the orthogonal test method, through the comparison of results, the best combinations are gained; This research result has certain reference value for cyclone separator design and performance optimization.

Research on Characteristics of Flow Field Inside Tangential Inlet Cyclone Separator

2012 ◽  
Author(s):  
Yigang Luan ◽  
Pengfei Liu ◽  
Haiou Sun ◽  
Yulin Deng
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Empirical Formula ◽  
Research Result ◽  
Internal Flow ◽  
Cyclone Separator ◽  
Resistance Characteristic ◽  
Simulation Results ◽  
Tangential Inlet ◽  
Simulation Scheme

Flow field inside tangential cyclone separator is a kind of complex three-dimensional rotation turbulent flow. To optimize the flow field structure and shorten the cycle of research and development, it is essential to find an appropriate calculation method to predict the flow field inside cyclone separators. In the article, FLUENT software is employed to obtain the internal flow field of tangential inlet cyclone separator by adopting different calculation models and different numerical simulation scheme. Also the simulation result was compared with that of existing experiment data to find a reasonable solution for the simulation of the flow field characteristics inside the cyclone. After the examination to the rationality of the different numerical simulation method, and the comparative analysis in the main flow field parameters of the simulated results which is the most reasonable combination, the flow characteristics of internal flow field of tangential inlet cyclone separator was obtained. The results show that: when the grid number of calculation domain reach 860000, it can cater to the calculation conditions of flow field, and the simulation results can agree with the experimental data better and will hardly change with the grid number; On the basis of standard k-ε model, the numerical simulation scheme was formulated by the orthogonal experiment method, through the comparison of results, the best combinations are 2 and 11; Applying the optimized combination to RNG k-ε model, Realizable k-ε model and RSM model and comparing simulation results with the existing one show that RSM was the ideal model used in simulation; With the change of the flow rate came a resistance characteristic curve of cyclone separator. The comparison between it and the predicted results of existing empirical formula of resistance characteristic drew the numerical simulation result, which is closest to Dirgo empirical formula; the first and second order upwind form have certain influence on the numerical simulation results, but the second one is more accurate in terms of simulating and predicting the parameters distribution inside flow field. This research result has certain reference value for cyclone separator design and performance optimization.

Numerical Analysis of the Effect of an Inner Structure of a Cubic Frame Reef on Flow Field

2019 ◽  
Vol 53 (2) ◽  
pp. 83-92 ◽  
Author(s):  
Zhaoyang Jiang ◽  
Zhenlin Liang ◽  
Yanli Tang
Keyword(s):  
Flow Field ◽  
Structural Design ◽  
Field Effect ◽  
Design Method ◽  
Orthogonal Design ◽  
Artificial Reef ◽  
Decisive Role ◽  
Artificial Reefs ◽  
Remarkable Effect ◽  
Orthogonal Design Method

AbstractArtificial reefs have been deposited along the coastline of China for over 30 years. The purpose of artificial reef construction is to form a changeable and complicated flow field that can promote the water exchange of different layers and attract more fish and marine organisms, and the structure of artificial reefs plays a decisive role in these processes. However, the research on the hydrodynamic character of artificial reefs has primarily focused on improving their size or shape. The guide plate has a significant effect on the flow field effect of the cubic reef, which has been confirmed in previous studies. In this article, guide plates were extended to the interior of the cubic reef and finally form an inner structure consisting of four isosceles triangles and right triangles. The flow field effect of the inner structure is numerically simulated by the orthogonal design method. Results indicate that the inner structure creates a significant disturbance on the flow field. A crossed design of hole diameters on plates contributes to the formation of upwelling and extension of the wake region. The flux of upwelling in the different planes indicates that the flow of upwelling is strong above the upwelling reef and has a remarkable effect. This study provides a scientific reference for the structural design of artificial reefs.

Analysis on Online Mixing Performance of Jet-Mixing Apparatus

2011 ◽  
Vol 347-353 ◽  
pp. 417-421
Author(s):  
Xi Chao Xu ◽  
Bai Jing Qiu ◽  
Bin Deng ◽  
Fang Wen Jia
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Design Method ◽  
Concentration Field ◽  
Internal Flow ◽  
Test Method ◽  
Jet Mixing ◽  
Mixing Performance ◽  
Simulation And Experiment ◽  
Interior Flow

Aimed at investigating the design method and test method of jet-mixing apparatus, numerical simulation and experiment research were both used to investigate the internal flow field of jet-mixing apparatus in this article. Numerical simulation scheme for interior flow field of jet-mixing apparatus was established, CFD software Fluent was used to investigate in concentration field of jet-mixing apparatus. The concept of IOS was brought forward to evaluate the homogeneity degree of pesticide and water. Investigation both carried on area ratio effect on the mix homogeneity of the jet-mixing apparatus and the distribution of pesticide concentration in the axial and radial of mixing tube.

The Study on Solid Superacid Synthesis of K12A with Manufacturing Equipment

2012 ◽  
Vol 583 ◽  
pp. 285-288
Author(s):  
Dong Mei Zhao ◽  
Xue Peng Liu
Keyword(s):  
Catalytic Activity ◽  
Metal Oxide ◽  
Design Method ◽  
Orthogonal Design ◽  
Manufacturing Equipment ◽  
Solid Superacid ◽  
Orthogonal Design Method ◽  
Superacid Catalyst ◽  
Calcined Temperature ◽  
Very High

By orthogonal design method, Catalytic activity of /ZrO2 solid superacid is studied, and the influence of catalyst characteristic and structure by manufacturing equipment is issued. It is concluded that the best prepared conditions of the superacid catalyst /ZrO2 for the synthesis of Octyl-Polyglycoside are followed:(1) PH=9.5; (2) calcined temperature at 500; (3) M(H2SO4)=0.5mol/L. Using this kind of catalyst the conversion of glueoside may reach as high as 96% in the synthesis of OCtyl-Polyglycoside and the selectivity is very high for the synthesis of Octyl-Polyglycoside. By introducing other metal oxide, the catalytic activity of complex solid superacid is studied.

Contrast Study on the Radial Velocity of the Flow Field of the Hydrocyclones with Different Inlet Structures

2011 ◽  
Vol 339 ◽  
pp. 624-629
Author(s):  
Lian Cheng Ren ◽  
Zheng Liang ◽  
Jiang Meng ◽  
Lin Yang ◽  
Jia Lin Tian
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Radial Velocity ◽  
Axial Symmetry ◽  
Separation Efficiency ◽  
Great Influence ◽  
The Other ◽  
Contrast Study ◽  
The One ◽  
Tangential Inlet

On the base of numerical simulation and theoretical analysis, the flow field of a conventional single-tangential-inlet Hydrocyclone and a newly put forward axial-symmetry double-tangential-inlet hydrocyclone were contrasted. The study shows that the inlet structure of the Hydrocylone has a great influence on the radial velocity of the flow field in the hydrocyclone and that the radial velocity in the hydrocyclone with single-tangential-inlet is not symmetry about the axis of the hydrocyclone; and on the other hand the radial velocity in the hydrocyclone with axial-symmetry double-tangential-inlet is symmetry about the axis of the hydrocyclone. The magnitude of the radial velocity of the flow in the hydrocyclone with single-tangential-inlet is greater than that in the hydrocyclone with axial-symmetry double-tangential-inlet hydrocyclone, which means the hydrocyclone with axial-symmetry double-tangential-inlet has greater capability than the rival one with single-tangential inlet. The symmetry about the axis of the hydrocyclone of the radial velocity means the radial velocities in the place where the radio is the same are constant, which means the hydrocyclone has a great separation efficiency. The conclusion is that changing the conventional hydrocyclone into the one with axial-symmetry double-tangential-inlet structure can offer greater separation capability and efficiency.

scholarly journals Optimization of Evodiamine-Imprinted Composite Membrane by Orthogonal Design Method

2013 ◽  
Vol 25 (18) ◽  
pp. 10425-10430
Author(s):  
Huiling Cheng ◽  
Guangyan He ◽  
Xiufang Zhu ◽  
Hao Zhou ◽  
Mingfeng Wang ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Design Method ◽  
Orthogonal Design ◽  
Orthogonal Design Method

The Research of the Lime Soil Properties on the Road in Jilin Area

2012 ◽  
Vol 446-449 ◽  
pp. 2478-2481
Author(s):  
Dong Guo Li ◽  
Gui Mei Shi
Keyword(s):  
Design Method ◽  
Orthogonal Design ◽  
General Rule ◽  
Effect Factor ◽  
The Road ◽  
Orthogonal Design Method ◽  
Region Difference ◽  
Stabilized Soil ◽  
On The Road ◽  
Special Region

Lime soil, literature [1] just gave a general rule to the mixture’s composition design. Because of the soil’s ingredient region difference, the reasonable mix of lime soil in special region must be determined by the test. This paper first quoted the formation of lime soil’s strength and the effect factor, and then regarded the non-side limitation compressive strength at different ages as inspection norm. Used orthogonal design method, the mix for the lime stabilized soil in Jilin area was investigated in this paper. The optimum mix and the main effect factor was determined by the strength at 28 days and verified by the regression strength at 90 days. In the meantime, the key problem had been summarized on the lime stabilized soil construction point and quality control.

scholarly journals Orthogonal Design Method for Optimizing Roughly Designed Antenna

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Qing Zhang ◽  
Sanyou Zeng ◽  
Chunbang Wu
Keyword(s):  
Design Method ◽  
Orthogonal Design ◽  
Simulation Software ◽  
Specific Region ◽  
Antenna Design ◽  
Wire Antenna ◽  
Real World Application ◽  
Orthogonal Design Method ◽  
Numerical Electromagnetics ◽  
Geometrical Factors

Orthogonal design method (ODM) is widely used in real world application while it is not used for antenna design yet. It is employed to optimize roughly designed antenna in this paper. The geometrical factors of the antenna are relaxed within specific region and each factor is divided into some levels, and the performance of the antenna is constructed as objective. Then the ODM samples small number of antennas over the relaxed space and finds a prospective antenna. In an experiment of designing ST5 satellite miniantenna, we first get a roughly evolved antenna. The reason why we evolve roughly is because the evolving is time consuming even if numerical electromagnetics code 2 (NEC2) is employed (NEC2 source code is openly available and is fast in wire antenna simulation but not much feasible). Then the ODM method is employed to locally optimize the antenna with HFSS (HFSS is a commercial and feasible electromagnetics simulation software). The result shows the ODM optimizes successfully the roughly evolved antenna.

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