A CFD Method Study on the Resistance Performance of the Axial Flow Cyclone Separator

2017 ◽  
Author(s):  
Yigang Luan ◽  
Lianfeng Yang ◽  
Tao Sun
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Axial Flow ◽  
Internal Flow ◽  
Operating Pressure ◽  
Cyclone Separator ◽  
Axial Flow Cyclone ◽  
Flow Field Characteristics ◽  
Numerical Simulation Methods ◽  
Resistance Performance

Axial flow cyclone separator with guide blade has been widely used, due to its low resistance, huge gas processing and small volume. Although its structure is simple, three-dimension strong rotating turbulent flow forms which involves many complex interactions such as dual-phase separation, adsorption and electrostatic interference. This paper is focused on studying the resistance performance of the axial flow cyclone separator. Numerical simulation methods are carried out to acquire the internal flow field characteristics under different operating pressure and temperature conditions. The result shows that the pressure drop decreases under the same operating pressure, as the operating temperature increases. When the operating temperature is the same, the higher operating pressure enhances the value of the pressure drop. Velocity distribution, pressure contours and turbulent viscosity contours have been presented, to analyze the characteristics of the internal airflow, so as to help optimize the design. Experiments are intended to verify the results of numerical simulation and explore the internal flow field of the cyclone separator further. The cyclone separator has 8 rotary blades which are split into 8 parts, namely one blade is 45° in the tangential direction. 0° and 22.5° are chosen in the experiment. The dimensionless pressure distribution is shown. A comparison of the CFD results and the experimental results is made to prove that the numerical simulation methods are correct and accurate. The curve of the numerical simulation results is very close to that of the experimental results with the similar trend. It is concluded that the methods can predict the internal flow field characteristics of the axial flow cyclone separator.

Numerical Optimization of Oilfield Heating Furnace Research

2013 ◽  
Vol 805-806 ◽  
pp. 1874-1877
Author(s):  
Jie Nan Dong ◽  
Xu Su ◽  
Tong Chen ◽  
Miao Wang ◽  
Xiao Xu Li
Keyword(s):  
Numerical Simulation ◽  
Temperature Distribution ◽  
Flow Field ◽  
Internal Flow ◽  
Heating Furnace ◽  
Oil Field ◽  
Simulation Tools ◽  
Flow Field Characteristics ◽  
Numerical Simulation Methods ◽  
Physical And Chemical

In this paper,using numerical simulation tools PHOENICS for numerical simulation study is made on furnace gas burning in the hearth, and analyses furnace oil furnace temperature distribution in the flow field characteristics the internal flow field of oil field heating furnace hearth temperature distribution characteristics. On this basis, this paper establisheda mathematical model which can truly describe the chamber internal physical and chemical changes, selected the appropriate numerical simulation methods, plotted the actual temperature profile case, which can reflect the qualitative and quantitative actual situation of work.Finally suggestions are given, which provides the theoretical foundation for the next step and the actual research.

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 Simulation on Flow Field of Bladeless Fan

2014 ◽  
Author(s):  
Li Guoqi ◽  
Lin Peifeng ◽  
Cui Baoling ◽  
Jin Yingzi ◽  
Hu Yongjun ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Fluid Motion ◽  
Internal Flow ◽  
External Flow ◽  
Computational Domain ◽  
Static Characteristics ◽  
Whole Process ◽  
Velocity Magnitude ◽  
Flow Field Characteristics

With the advent of bladeless fan, technological revolutions begin to hit the industrial design world of fan. However, there is none of the developed methods on bladeless fan. To explore the excellent blowing performance of bladeless fan, numerical simulation on flow field of bladeless fan was carried out in this paper. Based on the simplified model of bladeless fan, the whole process that the airflow passes through the turbine from the inlet to the outlet slit and exit far field at last, were simulated. By comparing the flux of inlet and the flux of far outlet, the causes of flux increasing are analyzed. After analyzing static characteristics of the flow field, it shows that pressure difference is very obvious. The results obtained from velocity distribution and the characteristics of the pathlines near diffuser section and turbine, were described and analyzed. The results show that the internal flow field characteristics of bladeless fans, which we concern. The external flow field characteristics of bladeless fan was studied in the same way. And it is found that the velocity magnitude of the outlet slit and Coanda surface is much larger than other area and different positions play different roles. A general analysis on inside computational domain and outside computational domain, denotes the details about fluid motion. The research could offer reference to improvement of bladeless fan.

Numerical simulation of an internal flow field in a uniflow cyclone separator

2015 ◽  
Vol 274 ◽  
pp. 135-145 ◽  
Author(s):  
Jeongseog Oh ◽  
Sangil Choi ◽  
Jeonggeun Kim
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Internal Flow ◽  
Cyclone Separator

scholarly journals Experimental and Numerical Study on the Resistance Performance of an Axial Flow Cyclone Separator

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Yigang Luan ◽  
Haiou Sun
Keyword(s):  
Pressure Drop ◽  
Numerical Study ◽  
Ambient Pressure ◽  
Axial Flow ◽  
Operating Conditions ◽  
Cyclone Separator ◽  
Pressure Drops ◽  
Axial Flow Cyclone ◽  
Cfd Method ◽  
Resistance Performance

The purpose of this paper is to study the pressure drop of an axial flow cyclone separator as a function of inlet velocities using experimental and computational fluid dynamics (CFD) methods. First, the resistance performance of the separator was acquired under ambient pressure and temperature with little change by wind tunnel experiments. Then, numerical simulations were carried out in CFD code Fluent 6.3 under standard operating conditions. A comparison between the experimental and CFD data demonstrates that the CFD method can predict the pressure drop of the axial cyclone separator excellently. Additionally, the results show that the axial flow cyclone separators have a pressure drop coefficient of approximately 7.5. To study the effect of ambient pressure and temperature on pressure drops, the same CFD method was employed to predict the resistance performance under various operating conditions. Then the numerical results were compared with the data of a normalization process method of pressure drops raised in this paper. Their comparison demonstrated that the normalization method had a high precision in predicting the influence of ambient operating parameters on pressure drops of an axial flow cyclone separator.

scholarly journals Numerical Simulation of Flow Field Characteristics and Separation Performance Test of Multi-Product Hydrocyclone

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 300 ◽  
Author(s):  
Yuekan Zhang ◽  
Peikun Liu ◽  
Lanyue Jiang ◽  
Xinghua Yang ◽  
Junru Yang
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Performance Test ◽  
Size Fraction ◽  
Internal Flow ◽  
Separation Performance ◽  
Size Fractions ◽  
Overflow Pipe ◽  
Flow Field Characteristics ◽  
Fine Classification

A traditional hydrocyclone can only generate two products with different size fractions after one classification, which does not meet the fine classification requirements for narrow size fractions. In order to achieve the fine classification, a multi-product hydrocyclone with double-overflow-pipe structure was designed in this study. In this work, numerical simulation and experimental test methods were used to study the internal flow field characteristics and distribution characteristics of the product size fraction. The simulation results showed that in contrast with the traditional single overflow pipe, there were two turns in the internal axial velocity direction of the hydrocyclone with the double-overflow-pipe structure. Meanwhile, the influence rule of the diameter of the underflow outlet on the flow field characteristics was obtained through numerical simulation. From the test, five products with different size fractions were obtained after one classification and the influence rule of the diameter of the underflow outlet on the size fraction distribution of multi-products was also obtained. This work provides a feasible research idea for obtaining the fine classification of multiple products.

scholarly journals Experimental and Numerical Investigation of Pressure Fluctuation in a Low-Specific-Speed Centrifugal Pump with a Gap Drainage Impeller

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Li Zhang ◽  
Hui Li ◽  
Hong Xu ◽  
Weidong Shi ◽  
Yang Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Pressure Pulsation ◽  
Internal Flow ◽  
Stable Operation ◽  
Simulation Methods ◽  
Centrifugal Pumps ◽  
Numerical Simulation Methods ◽  
Low Specific Speed ◽  
Specific Speed

In order to analyze the effect of impeller with different slot widths on the performance of the low-specific-speed centrifugal pumps, based on the impeller of a single-stage pump with the specific speed of 21, two gap drainage schemes with slot widths of 1.5 mm and 6.0 mm, slot diameter of 180 mm, and lap length of 5 mm were designed. Both experimental and numerical simulation methods were applied to compare the steady performance, which includes the head, efficiency, and the internal flow field distribution, and the unsteady pressure pulsation performance between new designed pumps and the original pump. The results show that gap drainage would cause a certain degree of head reduction, but a smaller slot width could achieve higher efficiency. Meanwhile, a reasonable open seam scheme can reduce the development of pressure pulsation, which provides experience and reference for the stable operation of low-specific-speed centrifugal pumps.

Effect of Inlet Prewhirl on Flow Field of Axial Flow Fan

2013 ◽  
Vol 732-733 ◽  
pp. 571-576
Author(s):  
Zhou Ye ◽  
Hai Yang Zhao ◽  
Yang Yang ◽  
Chun Li ◽  
Wei Gao
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Flow Rate ◽  
Flow Separation ◽  
Central Area ◽  
Axial Flow ◽  
Internal Flow ◽  
Field Structure ◽  
Suction Surface ◽  
Flow Loss

The flow in a single-stage fan is analyzed through numerical simulation. The results indicate that there exists a best prewhirl angle which can make flow loss minimal at a given flow rate. So we can improve the internal flow field structure by changing the prewhirl angle, thus the fan efficiency can be raised. In addition, the flow separation on the suction surface is sensitive to the variation of the prewhirl angle. The range of the separation on suction surface increases with the decrease of the prewhirl angle, and expands to the central area of the blades.

Sign in / Sign up

Export Citation Format

Share Document