Topics under the heading should be based on:
Component modeling with associated dialogs
- **Attention** Please see the following AutoPIPE help section:
Help > Tutorial>
This help has been provided in order to give users ideas for modeling typical piping arrangements. The steps shown in each example should not be taken as the only method available to create models. In addition, the intent of the examples is to present ways to create adequate models for analytical purposes.
Tutorial #1 : Acoustic Mode Shapes
The purpose of this tutorial is to introduce the basic operations of the PULS application. The tutorial will
show you how to produce acoustic mode shapes of a simple system. It will walk you through the various
steps in model building. You will define the piping system by specifying system geometry, fluid
properties and boundary conditions. You will learn how to view and print your results.
Tutorial #2 : Modeling a Reciprocating Compressor
The purpose of this tutorial is to introduce the basic operations of PULS to model a reciprocating
compressor system. This tutorial assumes that you have not completed Tutorial 1, therefore, some of the
information may be repeated. - The following model files are included with PULS :
2CYL.LP1 - TWO CYLINDER COMPRESSOR EXAMPLE
COOLER.LP1 - GAS COOLER
EX-BOT.LP1 - SUCTION BOTTLES AND COMPRESSOR
EX-SUCT.LP1 - SUCTION SYSTEM
METER.LP1 - METER RUN : Globe Valve Source
PISTON.LP1 - Piston (Volume Velocity) source.VS = 0.01 m3/sec, Natural gas/ sound speed = 494 m/sec
PRESURE.LP1 - Press source for a branch system., PS = 10 kPa, Natural gas, sound speed = 494 m/sec
PUMPFIX.LP1 - PULS models involving a reciprocating triplex pump
PUMPSUC.LP1 - PULS models involving a reciprocating triplex pump
RECIPP. LP1 - RECIPROCATING COMPRESSOR EXAMPLE
T1. LP1 - Pulsation Source: T1 - Mode 1
T1-1. LP1 - Pulsation Source: T1 - Mode 1 - We would like to know if PULS (Option 3) is suitable for modelling the shaking forces in dead-leg side branches from vortices generated by a corrugated pipe with flow. We already know the amount of energy and flow conditions which the vortices generate in the corrugated pipe, so PULS does not need to calculate them. We just need a way of putting in an energy source in the (e.g. middle of the corrugated pipe). We have considered using a suitably scaled velocity source or pressure source, but both of these would impose reflective boundary conditions (like an open or closed end) which do not exist in reality. Is there a way of modelling this in PULS?
Answer: Suggest to try and insert a tee point on the tee branch very close to tee point. The length would be short and you would add a velocity source there. They can scale the source to give a known pulsation at the dead end if known. When I try to adjacent flow directions, I mess the pulsation, and when I go to adjust the pulsation, it messes the flow direction. Have been doing that for the last hour. Is there anyway to avoid this interactions ?
Answer: These should not interact usually. Send model for review.If I have two nodes which I would to turn them into one, what do I need to do to equate them?
Answer: Delete the element joining them and then you update one element and change the node number to be same as other node.Does adding a Volume element have the same acoustic effects as adding an enlarged pipe say that is having the same volume?
Answer: Not exactly. The pipe element has a length and hence it has some possible frequencies. But these may be ignored since they are usually high, but not always. It is more accurate to model using lengths since most vessels or passages have lengths.
See Also
External Links
Bentley Technical Support KnowledgeBase
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