cfx-intro 14.5 appendix a turbo

8/13/2019 CFX-Intro 14.5 Appendix a Turbo

1/21

2012 ANSYS, Inc. December 21, 2012 1 Release 14.5

14. 5 Release

Introduction to ANSYS CFX

Appendix A

Turbo Pre and Post


2/21


CFX-Pre Turbo Mode

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.


3/21


CFX-Pre Turbo Mode

1. Basic Settings

setup axis of rotation and coordinate frame


4/21


CFX-Pre Turbo Mode

2. Component Definition

Import meshes

Define rotating or stationary

Define rotational speed

Define number of passages

Define tip clearance if applicable


5/21


6/21


CFX-Pre Turbo Mode

4. Interface Definition

Setup/Check all Domain

Interfaces

Frozen rotor

Stage

Periodic

None


7/21 2012 ANSYS, Inc. December 21, 2012 7 Release 14.5

CFX-Pre Turbo Mode

5. Boundary Definition

Define/check boundary

conditions



CFX-Pre Turbo Mode

6. Final Operation

Enter General Mode to make

further operations

OR

Write .def file and start the

solver



CFX-Pre Turbo Mode

Summarysix steps:

1. Basic Settings

2. Component Definition

3. Physics Definition

4. Interface Definition5. Boundary Definition

6. Final Operation



CFX-Pre General Mode

After the case has been set up in Turbo Mode, the following

modifications can be made in general mode:

Component mesh or case reload

One to One connections for periodic and stationary domain

connections can be specified directly

Display of monitor points and source points

Domain interface visibility control


11/21


12/21


CFX-Post Turbo Workspace

Initialization

Automatic Initialization

Manual Initialization

User selects hub, shroud, blade, inlet, outlet,

and periodic surfaces

Calculate Velocity Components

Ex. Radial, Tangential, and Meridional velocity

components


13/21



Four types of objects available that are useful for turbo

machinery applications

3D View

Blade-to-Blade

Meridional

Turbo Charts


14/21


15/21



Blade-to-Blade Plot

Select Span

Can generate the following

plots:

Colour

Contour

Vector

Streamlines


16/21


17/21



Turbo Chart

Select one of the following chart types:

Blade Loading

Circumferential

Hub to Shroud

Inlet to Outlet

Select the location according to the chartselected

Select the number of sampling points

Select the variables to be plotted

Select the type of circumferential averaging


18/21



Turbo Macros

Four predefined macros

Gas Compressor Performance

Gas Turbine Performance

Liquid Turbine Performance

Pump Performance

Turbo Noise

Modify input requirements as

required

Generates a report in .htmlformat


19/21



Turbo Reports

The turbo reports are designed forsingle bladerow, single phase fluid

analyses. The turbo reports can be

used for individual bladerows of a

multi-bladerow analysis by loading

each bladerow domain separatelyinto CFX-Post using the domain

selector.


20/21



Automated initialization of components

All turbo post objects are presented in a single encapsulated

interface

Turbo Post graphical objects can be promoted to full post

processing mode for general use if desired

Tables can be created within CFX-Post


21/21


Key Point

Turbo-Pre

facilitates setup of rotating machinery problems

Turbo-Post

provides additional functionality in CFX-Post to add powerful post-processing

capabilities of turbo cases

For Practical Examples: Axial Rotor-Stator Example

Tutorial # 14

cfx-intro 14.5 appendix a turbo

Documents