Helical inlet cyclone separator

COMPUTATIONAL FLUID DYNAMICS (CFD) STUDY OF A CYCLONE SEPARATORS

PSM 1

Supervisor : Dr. Mohamad Shukri bin Zakaria. examiner 1: Prof. Madya Dr. Fatimah Al-Zahrah binti Mohd Sa'at examiner 2: En. Faizil bin Wasbari

MUHAMMAD ALIF NAJMI BIN ASRIN YUSAIRI

INDEX

05. Literature review

01. Introduction

06. Methodology

02. Problem Statement

03. Objective

07. Flowchart

08. Conclusion

04. scope

01. Introduction

cyclone separator

• A gas-particle cyclone separator is a separating device that separate solid particles from contaminated gas streams that relies on centrifugal force that is generated inside the machine.

• To analyze the performance of the cyclone separator, we can measure it by using a CFD software. It can help us identify the behavior of the airflow inside the machine.

• The cyclone separator has been used in industrial applications such as power generations, gas turbines, chemical processes

02. problem statement

problem

action

• The existing design may not give a sufficient pressure drop and separation efficiency. cyclone separator need to have low pressure drop and high separation efficiency for it to function properly.

• The inlet is important in cyclone separators as it significantly influences the flow patterns, pressure drop, and separation efficiency within the cyclone.
• Inlet angle affects the distribution of static pressure, tangential velocity, axial velocity, and turbulent kinetic energy in the cyclone. The separation efficiency of particles is influenced by the inlet angle.The maximum separation efficiency from previous research is about 78% at the inlet angle of 15 deg.

• Construct a helical inlet and design 5 different inlet angle which is (-30°, -15°, 0°, 15°, 30°) to affect the separation effciency and presure drop on a cyclone separator
• Conduct a comprehensive Computational Fluid Dynamics (CFD) analysis

03.objective

The objectives of this project are as follows:

1. To develop a multiphase (Discrete Phase Model) CFD method
2. To analyse the effect of 5 helical inlet in different angles (-30°, -15°, 0°, 15°, 30°) on the pressure drop and separation efficiency.
3. To run parametric studies and optimization of cyclone separator design and choose the best design and parameters

Discussion

04.scope

The scopes of this project are:

CFD

1. The CFD simulation will be running on Ansys Fluent
2. This research's analysis will be compared with the research paper titled “Effect of the inlet angle on the performance of a cyclone separator using CFD-DEM” by Shyuan Wang (2018)
3. This research identify
1. Tangential velocity
2. pressure drop
3. Static presssure in 4 position of the body
4. inlet angle
5. separation efficiency
4. This research will use K-epsilon turbulence model for this analysis
5. The inlet gas velocity will be set to 19.32 m/s

SOURCE

CONDITIONS

PRESSURE DROP

SEPARATION EFFICIENCY

05.literature review

summary of literature review

05.literature review

summary of literature review

06.Methodology

2. Model development

1. Literature review

Journals, articles, or any materials regarding the project will be reviewed.

The design parameters of the cyclone separator and the inlet is made using SolidWorks software. The design is based on the parameters used in the research literature. The design will be a cyclone separator that is fixed with a spiral screw inlet and installed at 5 different angles (-30°, -15°, 0°, 15°, 30°) from the flat top of the design.

06.Methodology

4. pressure drop

3. separation efficiency

The total pressure drop reduction cC and the reduction of pressure losses in the vortex finder cVF will be applied.

The cyclone separation efficiency, was determined by

• m is the mass of the collected particles
• f(Dp) is the frequency of the particles in the size range of Dp.
• The subscripts D represent the particles collected in the dust box
• The subscripts D represent the particles collected from the vortex finder, respectively.

where Dpc and Dpvf are total pressure drop in a cyclone and pressure losses in the vortex finder,

06.Methodology

6. Ansys Mesh (element size and mesh quality)

5. Ansys geometry (name)

In Ansys geometry, a 3D Solidwork model will be imported into Ansys. Next, the inlet, outlet and the collection bin will be named for easy referencing.

The meshing process will be including contact sizing, patch conforming and inflation. The process will be using a resolution of 7 for a fine mesh. Smoothing will be set on high. The mesh will use tetrahedron method.

06.Methodology

7. Ansys setup (viscous, discrete phase, boundary, method, initialization, calculations)

1. On viscous model, set the model to k-epsilon. And make the setup, K-epsilon model RNG. On the RNG setup, choose swirl dominated flow. Near wall treatment.as standard wall function.
2. On the discrete phase menu, create injections to determine what will be entering the body from the inlet. Air will be selected as the fluid for this simulation.
3. On the boundary conditions, set the velocity-inlet DPM as reflect. The velocity-outlet DPM will be set as escape and the collection bin will be set as trap.
4. On methods, the moment, turbulent kinetic energy, turbulent dissipation rate and energy will be set to second order upwind.
5. After everything is set, initialization will be ready to be done. The process will be done as hybrid.
6. Lastly, run the calculations and export the track particle data to be used on the Ansys results.

06.Methodology

9. Analysis and proposed solution

8. Ansys solution (element size and mesh quality)

Import the track particle data and change its transparency. Run animation Track particle is imported into Ansys solution to review the data that has been calculated in the Ansys setup.

Export the required data into graphs for easy analysis and compare the result with the problem statement.

10. Report writing

A report on this study will be written at the end of the project.

07.flowchart

08. Previous study results

-Figure 1

-Figure 2

-Figure 3

-Figure 4

-Figure 5

09. preliminary works

10.Conclusions

• This research will gain valuable data on Cyclone separator performance by installing a helical inlet design at different angle.
• This research will provide the foundation for the rationality behind embracing innovative helical inlet designs at different angle

The end

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