flow characteristics through a v-port ball valve. - … beac… · flow characteristics through a...

© 2011 ANSYS, Inc. 8/29/111

Flow Characteristics Through a V-Port Ball Valve.

By: Rammone BartlettMSME Graduate Student

Dept. of Ocean and Mechanical Engineering

Florida Atlantic University

© 2011 ANSYS, Inc. 8/29/112

• Demonstrate of how I’ve used ANSYS Products to carry out research on a V-Port Ball Valve.

• Focus on Computational Fluid Dynamics (CFD) Analysis Capability of ANSYS

Focus of Presentation

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Can we make a better control valve? I have an idea in mind but I’m not sure if it is viable. I’m not yet ready to commit to a full scale project. Is there anything that can be done to support a move to a full project?

Maybe. Can you elaborate upon your problem?

Identifying the Problem

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Control valves are extremely important devices that are employed in nearly all piping/fluid circulation systems.

A typical control valve is a device that is usually located somewhere within the fluid path that limits the flow rate of a substance.

eg. Taking a shower

There was a control valve connected to that knob. The more you turned, the more water that flowed.

A V-Port control valve is a kind of valve that has a certain geometry that has specific advantages over others.

What is a V-Port Control Valve?

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Ball Valves Fully Open/Fully Close Use

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Globe Valves More Controlled Opening Closing

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V-Port Control Valve

V-Port Ball (Front View)

Top View

Side View

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One can imagine that for industrial purposes controlling the flow rate can be crucial to a chemical processes.

• Having a linear relationship between the valve opening angle and a valve’s flow coefficient is particularly desirable as this can lead to less expensive control solutions.

• V-Port Ball valves may be further optimized through changes in geometry or through the addition of anti-cavitation devices.

Identifying the Problem cont’d

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• The V-Port valve must be analyzed so that an informed decision can be made about how to go ahead (or not) with a product design.

• At the same time there are constraints on time schedule and budget.

The Problem

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Using ANSYS Simulation Software: • The geometry of concern will be modeled.

• A fluid dynamic analysis will then be performed.

• Certain parameters will then be obtained from said analysis which will indicate whether the valve design is viable for further development.

The Solution

© 2011 ANSYS, Inc. 8/29/1111

General Procedure:

1. Obtain/Create Geometry and Generate Mesh

2. Choose Appropriate Fluid Dynamics Model

3. Set Boundary Condition and Run Simulation

4. Evaluate Results

Walk-Through of Study

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Geometry Creation and Mesh Generation

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Choosing Fluid Dynamics Model, Setting boundary Conditions and Running

Figure 1-k ε “Standard”

Figure 2-k ε “Realizable”

Figure 3-k ω

Figure 4-k ω “SST”

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Evaluation of Results - Velocity Stream Lines (Animation)

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Evaluation of Results - Parametric Study (Varying Velocity) 4 m/s6 m/s2 m/s

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Evaluation of Results - Parametric Study (Varying Opening Angle)40 %

Open80%

Open5%

Open

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Loss Coefficient

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• After running simulation results yielded practical operating range of control valve.

• The valve was characterized before it was even manufactured.

• Parametric study allowed one to see how different operating conditions would affect the flow.

• Possible cavitation regions were identified. Design changes can be made to address cavitation.

Conclusion

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Using ANSYS SOFTWARE:• Simulate the flow of fluid relatively quickly

and systematically. Due in part to ANSYS Support documentation which walks one through procedures step by step.

• Provide feedback to client so that informed decisions can be made.

Final Remarks

flow characteristics through a v-port ball valve. - … beac… · flow characteristics through a...

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