Impulse 4.0 Quick Start.Pdf

AFT Impulse

TM

Quick Start Guide

AFT Impulse version 4.0
Waterhammer Modeling in Piping Systems

Applied Flow Technology

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manuals\i4\quickstart\impulse4 quickstart c.doc

Information in this document is subject to change without notice. No part of this Quick
Start Guide may be reproduced or transmitted in any form or by any means, electronicor
mechanical, for any purpose, without the express written permission of Applied Flow
Technology.

© 2007 Applied Flow Technology Corporation. All rights reserved.
Printed in the United States of America.

"AFT Impulse", "AFT Fathom", "Applied Flow Technology", and the AFT logo are
trademarks of Applied Flow Technology Corporation.
Windows is a registered trademarks of MicrosoftCorporation. “CAESAR II” is a
registered trademark of COADE, Inc.

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Contents
1. Introducing AFT Impulse ............................................... 1
Designing for waterhammer ..................................................................... 1
Modelingcapabilities......................................................................... 2
The steady-state solver ............................................................................. 2
The transient solver .................................................................................. 2
Engineering assumptions in AFT Impulse ............................................... 3
AFT Impulse PrimaryWindows............................................................... 3
Input windows.................................................................................... 4
Output windows ................................................................................. 4

2. Valve Closure Example.................................................. 5
Topicscovered.......................................................................................... 5
Required knowledge ................................................................................. 5
Model files................................................................................................ 5
Step 1. Start AFT Impulse ........................................................................ 6
The Workspacewindow..................................................................... 7
Step 2. Layout model................................................................................ 7
Step 3. Complete the first three checklist requirements ........................... 8
A. Review the checklist...................................................................... 8
B. Specify systemproperties.............................................................. 9
Step 4. Define the model components (checklist item #4) ..................... 11
Object status..................................................................................... 11
A. Enter data for reservoirs .............................................................. 11
B. Enter branch data......................................................................... 12
C. Entervalve data ........................................................................... 12
D. Enter pipe data for P1.................................................................. 14
E. Enter data for other pipes ............................................................ 15
Step 5. Complete the last two checklist requirements............................ 16
A. Specify pipe sectioning............................................................... 16
B. Specify transient control.............................................................. 18

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iv AFT Impulse 4.0 Quick Start Guide
C. Save the model ............................................................................ 20
Step 6....