The Structure Design and Numerical Simulation of Internal Flow Field with High Efficiency Low Resistance Cyclone

2014 ◽  
Vol 1046 ◽  
pp. 209-212
Author(s):  
Liang Li
Keyword(s):  
Flow Field ◽  
Gas Flow ◽  
High Efficiency ◽  
Internal Flow ◽  
Structure Design ◽  
Field Calculation ◽  
Element Analysis ◽  
Low Resistance ◽  
Calculation Results ◽  
Field Velocity

Introduces the structure and main characteristics of high efficiency low resistance cyclone dust removal, the use of fluid finite element analysis software for the internal flow field is simulated. It can be concluded that gas flow in the cyclone separator, pressure field, velocity field, such as distribution, and on the basis of the flow field calculation results for the structure design about analyzed and discussed.

scholarly journals Optimization the operation parameters of SDA desulfurization tower by flow coupling chemical reaction model

2020 ◽  
Vol 22 (1) ◽  
pp. 35-45
Author(s):  
Dan Mei ◽  
Junjie Shi ◽  
Yuzheng Zhu ◽  
Xuemei Xu ◽  
Futang Xing ◽  
...  
Keyword(s):  
Flow Field ◽  
Chemical Reaction ◽  
Flue Gas ◽  
Large Scale ◽  
High Efficiency ◽  
Internal Flow ◽  
Reaction Model ◽  
Field Calculation ◽  
Two Phase ◽  
Desulfurization Efficiency

AbstractSpray Drying Absorber (SDA) has been widely used for large-scale desulfurization. However, it also has some limitations. For example, the liquid absorbent easily causes scaling, which impedes the contact between the serous fluid and the flue gas and reduces the chemical reaction rate and desulfurization efficiency. This paper establishes the mathematical and physical model of gas and liquid two-phase flow and droplet evaporation and heat transfer in rotary spray desulfurization tower. To study the accumulation and distribution of chemical reaction precipitates in the desulfurization tower and analyze the removal efficiency of sulfur dioxide (SO2) in different atomization diameters, this paper establishes a simulation model concerning the coupling of desulfurization reaction and flow field calculation based on the absorption and reaction mechanism of SO2. Baffle in different widths are set to optimize the internal flow field and balance the distribution of flue gas. By setting baffles of different widths to optimize the flow field in the tower and changing the distribution of flue gas, this model reduces the scaling while ensuring the desulfurization efficiency. The results of the simulation experiment have verified that the droplet with a diameter of 50 μm is the optimal option, which can effectively remove the scaling and ensure that the desulfurizing tower runs in high efficiency and stability. When the width of baffles is 2250 mm, the efficiency of desulfurization exceeds 95%, and the amount of scaling on the desulfurization tower main wall is controlled at the minimum level, which is the optimal option for production.

An Introduction of Aerodynamic Shape Optimization Platform for Compressor Blade

2016 ◽  
Author(s):  
Duan Yanhui ◽  
Wu Wenhua ◽  
Fan Zhaolin ◽  
Chen Ti
Keyword(s):  
Flow Field ◽  
Shape Optimization ◽  
High Efficiency ◽  
Optimization Method ◽  
Compressor Blade ◽  
Field Calculation ◽  
Aerodynamic Shape Optimization ◽  
Aerodynamic Shape ◽  
Grid Deformation ◽  
First Case

In this paper, an aerodynamic shape optimization platform for compressor blade is introduced. The platform divided into modules on flow field calculation, optimization method, parameterization and grid deformation. Flow field calculation of compressor blade is based on computational fluid dynamics (CFD), which is used for multi-block structure grid. Particle swarm optimization (PSO) is built as optimization method module, in which cost functions are calculated parallel. In parametric module, 3D blade is decomposed in a series of characteristic sections and the section is parameterized by Hicks-Henne function. Algebraic interpolation method is used for grid deformation, which is a high efficiency and robust method. Two cases of rotor 37 are presented. The result of the first case shows that, the CFD code of the optimal platform is reliable and robust. For the second case, the optimal platform is verified by designing rotor 37. The result shows that, the optimal platform is effective for design of compressor blade.

Design and Process Optimization of a New Reaction Cavity for High-Temperature MOCVD AlGaN Growth

NANO ◽  
2021 ◽  
pp. 2150084
Author(s):  
Jiadai an ◽  
Xianying Dai ◽  
Lansheng Feng ◽  
Zhiming Li ◽  
Jieming Zheng ◽  
...  
Keyword(s):  
High Temperature ◽  
Electronic Devices ◽  
Matrix Analysis ◽  
Element Analysis ◽  
Mocvd Growth ◽  
The Finite Element Analysis ◽  
Calculation Results ◽  
Field Velocity ◽  
Uv Luminescence ◽  
Luminescence Detectors

AlGaN offers new opportunities for the development of the solid-state ultraviolet (UV) luminescence, detectors and high-power electronic devices, however, problems such as low growth rate and poor crystallization quality are common in the growing process of AlGaN material. In this paper, a new reaction cavity for high-temperature MOCVD AlGaN growth was carried out through the research of resistance heated, and the thermal field of high-temperature MOCVD growth was numerically simulated. Based on the high-temperature MOCVD reaction cavity, an orthogonal experimental method was used to simulate the process parameters, and the range, variance and matrix analysis were conducted on the calculation results. The finite element analysis was conducted on the temperature field, pressure field, velocity field, and the high-temperature MOCVD AlGaN growth model was established.

Particles Separation of Hydrocyclone Based on CFD Simulation

2014 ◽  
Vol 535 ◽  
pp. 495-499
Author(s):  
Jing Song ◽  
Wei He ◽  
Zhe Kun Li ◽  
Wen Li Shi
Keyword(s):  
Flow Field ◽  
Optimization Design ◽  
Cfd Simulation ◽  
Internal Flow ◽  
Structure Design ◽  
Separation Performance ◽  
Flow Field Simulation ◽  
Research Status ◽  
Field Simulation

Analyzed the research status of hydrocyclone separation. By using CFD software, the important parameters of velocity and pressure in the hydrocyclone are analyzed and contrasted. Through simulation, it can accurately reflect the internal flow field, and can be used to predict the hydrocyclone separation performance. The results of flow field simulation will help to finish structure design of hydrocyclone and to provide the basis for the optimization design of hydrocyclone.

scholarly journals Numerical investigations on effect of wear-ring clearance on performance of a submersible well pump

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401770415 ◽  
Author(s):  
Weidong Shi ◽  
Xiongfa Gao ◽  
Qihua Zhang ◽  
Desheng Zhang ◽  
Daoxing Ye
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Computational Fluid Dynamics ◽  
Flow Field ◽  
Reverse Flow ◽  
Internal Flow ◽  
Experimental Results ◽  
Ring Size ◽  
Numerical Investigations ◽  
Calculation Results

A typical submersible well pump was investigated in this article. The whole flow field of submersible well pump was numerically simulated by computational fluid dynamics software. The influence of clearance of wear-rings on the external characteristic and internal flow field was analyzed through comparing the calculation results with experimental results. The result of the numerical simulation shows that changing clearance of front wear-ring has a greater impact on pump performances than changing clearance of back wear-ring, and the head and efficiency of pump decrease with the increase in the size of clearance. Especially when the size of clearance is larger than 0.5 mm, decreasing becomes more obvious. When the front and back wear-ring size of the clearance comes to 1.0 mm, the efficiency decreases from the highest point of 75.31% to 65.44% at rated flow, and the head of pump decreases about 3.5 m. When the size of clearance is 0.2 mm, reverse-flow will appear in the front shroud cavity of the impeller, and leakage from back wear-ring through the balance hole into the impeller, which has a little influence on the flow field of the impeller inlet.

Structure Design and Flow Field Simulation of Magnetic Liquid Suspension Centrifugal Blood Pump

2014 ◽  
Vol 624 ◽  
pp. 223-227
Author(s):  
Hua Chun Wu ◽  
Zheng Yuan Zhang ◽  
Pu Chen ◽  
Yong Wu Ren
Keyword(s):  
Flow Field ◽  
Magnetic Fluid ◽  
Three Dimensional ◽  
Internal Flow ◽  
Structure Design ◽  
Blood Pump ◽  
Pump Impeller ◽  
Centrifugal Blood Pump ◽  
Pump Design ◽  
Liquid Suspension

To reduce the energy consumption and blood damage of a centrifugal blood pump, this paper uses a permanent magnet bearing and blood flow pressure bearing to support blood pump impeller, design a magnetic fluid suspension centrifugal blood pump, three-dimensional numerical simulation of a magnetic fluid suspension centrifugal blood pump internal flow field, achieve the pressure of the blood pump flow channel and the velocity distribution, get the relationship between blood pressure and flow rate of the pump. The results can provide a theoretical basis for centrifugal blood pump design and improvement.

Multi-objective optimization design for a hydrodynamic retarder based on CFD simulation considering cavitation effect

2021 ◽  
pp. 095440622110145
Author(s):  
Konghua Yang ◽  
Chunbao Liu ◽  
Qingtao Wu ◽  
Xuesong Li
Keyword(s):  
Flow Field ◽  
Optimization Design ◽  
Cfd Simulation ◽  
Internal Flow ◽  
Structure Design ◽  
Multi Objective Optimization ◽  
Hexahedral Mesh ◽  
Nsga Ii ◽  
Multi Objective ◽  
Cavitation Effect

It is important to suppress cavitation phenomenon for lower vibration and noise, which can be realized by structure optimization to reduce cavitation bubbles of flow field. Nonetheless, performance factors in hydrodynamic retarder are usually conflicted when conducting a structure design, it is hard to simultaneously restrain cavitation and improve the retarding performance. In our study, a combination of comprehensive CFD simulation and multi-objective optimization is developed to improve the retarding torque ([Formula: see text]), lessen the volume of Retarder ([Formula: see text]) and reduce the volume of bubbles ([Formula: see text]) in the internal flow field. First, the elaborate CFD simulation calculation, included a refined hexahedral mesh and the stress-blended eddy simulation (SBES), is proposed to investigate the unsteady flow field considering the cavitation, and its accuracy is validated by experimental data. Then, the RSM (Respond Surface Method) approximation model is constructed by combination of DOE (Design of Method) and CFD methods. The NSGA-II (Non-Dominated Sorting Genetic Algorithm) is selected as multi-objective optimization algorithm, and the weight and scale factor of each sub objective are specified. The optimization results, verified by theoretical calculation, show that [Formula: see text] is increased by 22%–24%, [Formula: see text] is reduced by 32%–45% and [Formula: see text] is reduced by 1%. Furthermore, the comparison of the vortex distributions before and after optimization demonstrates that the optimization improves the flow field impact and pressure loss in the retarder and reduces the number of bubbles resulting in the increasing vortex. Additionally, parameters’ effect on the cavitation and the braking performance are analyzed to efficiently achieve the best comprehensive performance of the retarder design. The newly-developed optimization method, which can understand the optimization principle and guide a balance between the cavitation and the retarding performance improvement, will reduce huge trial cost and time cost in the manufacture.

Temperature Field Simulation of Electron Beam Cladding W Coating on Cu Substrate

2015 ◽  
Vol 1094 ◽  
pp. 331-334
Author(s):  
Li Wan ◽  
Yi Ping Huang ◽  
Rui Bin Zhang ◽  
Hai Hua Yu ◽  
Hang Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Electron Beam ◽  
Cooling System ◽  
Tungsten Powder ◽  
Element Model ◽  
Field Calculation ◽  
Element Analysis ◽  
Heating And Cooling ◽  
Calculation Results

A 3D Finite Element Model of the Temperature Field for Electron Beam Cladding of Pre-Tungsten Powder on the Surface of the Copper Block was Established, According to the Actual Situation of the Electron Beam Cladding Process, Based on Finite Element Analysis Software ANSYS Workbench, Analyzed the Temperature Field Distribution of the Electron Beam Cladding Process. Temperature Field Calculation Results Showed that the Cladding Process Heating and Cooling Speed was up to 103-104°C/s, and the Surface Temperature Increased Rapidly, while the Temperature of the Substrate Maintained Low, since the Water Cooling System.

Numerical Modeling of Fluid Flow in RH Vacuum Refining Process

2012 ◽  
Vol 542-543 ◽  
pp. 1069-1073
Author(s):  
Jing Yuan ◽  
Qing Ming Chang ◽  
Xi Lai Chen ◽  
Yin Kai Yang
Keyword(s):  
Numerical Simulation ◽  
Numerical Modeling ◽  
Fluid Flow ◽  
Flow Field ◽  
Gas Flow ◽  
Internal Flow ◽  
Refining Process ◽  
Gas Flow Rate ◽  
Inlet Velocity ◽  
Vacuum Refining

In this paper, the internal flow field of RH degasser was studied by numerical simulation. The range of the reasonable gas-inlet velocity which is related to the lift gas flow rate was obtained, then the results of two different gas-inlet velocities which are the reasonable velocity and the unreasonable velocity were chosen to be analyzed. Many vortexes and some differences of the flow fields were found in the RH degasser with the two different velocities. Through these results the development of the flow field could be got and it is valuable for the production in factory.

Finite Element Analysis of the Drum-Shape Cavity Fluidic Gyroscope Sensitive Mechanism

2013 ◽  
Vol 756-759 ◽  
pp. 4511-4514
Author(s):  
Chuan Zhi Mei ◽  
Lin Hua Piao ◽  
Bao Li Zhang
Keyword(s):  
Finite Element ◽  
Angular Velocity ◽  
Flow Field ◽  
Gas Flow ◽  
Angular Rate ◽  
Channel Structure ◽  
Element Analysis ◽  
Closed Cavity ◽  
Airflow Distribution ◽  
Cavity Structure

Against the deflect that the existing fluidic gyroscope airflow channel structure was easy to cause the flocculating flow. This paper presented a kind of elliotic-drum flow cavity structure. Using the finite element method, calculated the flow field in the closed cavity at different angular velocity input. The results showed that the gas flow path of the main airflow distribution was streamlined, there did not form the vortex area which could reduce the energy additional losses, when the angular rate input changed, then the jet flow field distribution didnt keep equal and symmetrical, the jet speed difference at the hot sensitive wire changed with angular velocity, thus revealing the drum-shape cavity fluidic gyroscope sensitive mechanism.

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