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Appendix B

Turbo Pre and Post

B-1ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved. April 28, 2009Inventory #002598

Introduction to CFX

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Turbo Pre


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Turbo Pre and Post

Training Manual

Turbo mode in ANSYS CFX-Pre is a specialist mode

allowing users to set up turbo machinery simulations,such as compressors or turbines, in a simple manner.

CFX-Pre Turbo Mode


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Turbo Pre and Post

Training ManualCFX-Pre Turbo Mode

At any time, users can enter turbo mode from the filemenu

Tools > Turbo Mode

Buttons at bottom to navigate through the wizard:

Next move to the next page

Back move to the revious a e


Finish any data that has been entered will becommitted, Pre goes into General Mode

Cancel close Turbo mode and revert to General Mode Meshes will remain, data will not

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Training Manual

1. Basic Settings

setup axis of rotation and coordinate frame

CFX-Pre Turbo Mode


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Training Manual

2. Component Definition

Import meshes (right-click)

Define rotating or stationary

Define rotational speed

Define number of passages

CFX-Pre Turbo Mode


e ne t p c earanceapplicable

For multiple stages, use right

click to:

Change component order Automatically align components

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Turbo Pre and Post

Training Manual

3. Physics Definition

Fluid properties

Steady State vs. Transient Model Data

Energy and Turbulence Models

Boundar Tem lates:

CFX-Pre Turbo Mode


Pt inlet - Ps outlet Pt inlet - mass flow outlet

Mass flow inlet Ps outlet

Interface Type:

Stage, Frozen Rotor, Transient Rotor Stator Solver parameters

Advection Scheme

Time Scale/Step controls

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Turbo Pre and Post

Training Manual

4. Interface Definition

Domain interfaces

automatically generated!

Setup/check all Domain

Interfaces

CFX-Pre Turbo Mode


Transient rotor stator

Stage

Periodic

None

Right-click to add or deleteinterfaces

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Training Manual

5. Boundary Definition

Boundary regions and

conditions automaticallysetup!

Define/check boundary

CFX-Pre Turbo Mode


Right-click to add or removeboundary conditions

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Training Manual

6. Final Operations

Options:

Enter General Mode tomake further operations

Ex. Create monitor points

Ex. Setup a multi-

CFX-Pre Turbo Mode

B-10ANSYS, Inc. Proprietary 2009 ANSYS, Inc. All rights reserved.

April 28, 2009Inventory #002598

configuration run

Write .def file and start thesolver

Option to quit CFX Pre

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Turbo Pre and Post

Training Manual

Summary six steps to setup a turbomachinerysimulation:

1. Basic Settings

2. Component Definition

3. Physics Definition

4. Interface Definition

CFX-Pre Turbo Mode



5. Boundary Definition6. Final Operation

Advantages: Rapid setup for turbomachinery simulations

Automatic creation of domain interfaces and boundary definitions

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Turbo Pre and Post

Training Manual

After the case has been set up in Turbo Mode, thefollowing modifications can be made in general

mode: Component mesh or case reload

One to One connections for periodic and stationary

CFX-Pre General Mode



Domain interface intersection control

Creation of monitor points and/or source points

Multi-configuration simulation

Execution control

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Turbo Post



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Turbo Pre and Post

Training Manual

The Turbo workspace improves and speeds up post-processing for turbo machinery simulations

All Turbo post-

CFD-Post Turbo Workspace



performed on theTurbo tab

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Turbo Pre and Post

Training Manual

The Turbo workspace:

Creates span, m, axial, radial and theta coordinate frames

Allows users to visualize components in turbo space

One-button calculation of velocity components (such ascircumferential, radial, axial, meridional)

Quickly generate turbo related charts and graphs

Provides access to turbo s ecific macros


B-15ANSYS, Inc. Proprietary

2009 ANSYS, Inc. All rights reserved.April 28, 2009

Inventory #002598

Works with Fluent or CFX results

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Turbo Pre and Post

Training Manual

Initialization

Input required to create backgroundmesh

Specify number of instances tovisualize full geometry

Options



2009 ANSYS, Inc. All rights reserved.

April 28, 2009

Inventory #002598

Manual Initialization

User selects hub, shroud, blade, inlet,outlet, and periodic surfaces

Calculate Velocity Components

Ex. Radial, Tangential, andMeridional velocity components

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Turbo Pre and Post

Training Manual

Background Mesh

Necessary to calculatestreamwise (m) and spanwise

coordinates 2D mesh formed by collapsing

hub, shroud, inlet and outlet onto an axial-radial plane




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ut ne s e w t mesconsisting of constant span andm lines

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Turbo Pre and Post

Training Manual

Four types of objects are available that are useful forturbo machinery applications

3D View

Blade-to-Blade

Meridional

Turbo Charts




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Inventory #002598

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Training Manual

3D View Plot

Can select which parts to draw

Optionally with mesh lines

Show Blade-to-Blade plot in 3D view

Show chart location lines

Instancin




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Turbo Pre and Post

Training Manual

Blade-to-Blade Plot

Select Span

Can generate thefollowing plots:

Colour

Contour


B-20

ANSYS, Inc. Proprietary


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Vector

Streamlines

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Turbo Pre and Post

Training Manual

Turbo Chart

Select one of the followingchart types:

Blade Loading Circumferential

Hub to Shroud

Inlet to Outlet


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Based on the chart type, usermany need to input:

X and Y axes variables

Spanwise and/or streamwiselocation

Number and distribution ofsampling points

Select the type of circumferentialaveraging

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Turbo Pre and Post

Training Manual

Turbo Macros

Four predefined macros

Fan Noise

Gas CompressorPerformance

Gas Turbine Performance

Li uid Turbine Performance


B-23



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Pump Performance Modify input requirements

as necessary

Generates a report in .html

format Calculates relevant

quantitative data

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Training Manual

Turbo Post

Automated initialization of components

All turbo post objects are presented in a single encapsulatedinterface

Turbo Post graphical objects can be promoted to full postprocessing mode for general use if desired


B-25



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Additional Tools in CFD Post Tables can be created

Multiple cases can be loaded and compared

Generation of performance curves

Turbo Surfaces and Turbo Lines can be created in GeneralMode

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Training Manual

Turbo-Pre

Facilitates setup of rotating machinery problems

Turbo-Post Provides additional functionality in CFD-Post to add powerful

post-processing capabilities for turbo cases

Key Point

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Axial Fan Workshop

Tutorial # 12

cfx12 b turbo

Documents