Applied Flow Technology Impulse 3.0.2004.10.20

Applied Flow Technology Impulse 3.0.2004.10.20
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Waterhammer analysis tools of the past have been noted for being difficultto use and requiring extensive specialized knowledge. As a result, thiscritical aspect of piping system design and operation has often beenoverlooked. But no longer. Now AFT ImpulseT offers the ease of use of adrag and drop interface and built in waterhammer modeling expertise. AFTImpulse helps you design and operate your systems with greater reliabilityand safety by avoiding the potentially catastrophic effects of waterhammerand other undesirable system transients. Piping systems engineers typicallydo not have the time to become specialists in waterhammer modeling. Now theydont have to. Now they can be equipped with the proper tools to design andanalyze for waterhammer transients in liquid systems containing water,petroleum and chemical products, cryogens, refrigerants and more.Waterhammer specialists will find a no compromise tool capable of modeling abroad range of waterhammer events, including transient cavitation andvarious surge suppression devices. AFT Impulse provides a built in libraryof fluids and fittings, variable model configurations, pump and controlvalve modeling and much more. Scenario Manager raises the what if potentialof waterhammer modeling to a new level. Multiple system configurationsvarying by any modeling parameter are easily managed within a single modelfile with a familiar hierarchical interface. Changes in the base model areautomatically inherited by alteate design cases.

AFT Impulse incorporates a steady state solver providing seamless transferof initial conditions to the transient analysis. The traditional Method ofCharacteristics are employed to solve the transient mass and momentumequations of pipe flow. Modeling vapor cavitation and liquid columnseparation, the effect of pressure surges due to vapor cavity collapse maybe evaluated. Modeling tools for a wide range of system components and surgedevices are included. Transients can be initiated based on time or on eventsin the system. For example, a valve closure transient may be initiated whena specified pressure level is attained at a location. From the powerfuldrag and drop model building features to the fully customizable output, AFTImpulse is a powerful tool ready to tackle your most demanding design problems.

FEATURES

Drag and drop modeling from an on screen palette of components
Open and closed (i.e., recirculating) systems
Network systems that branch or loop, with no limit on number of loops
Systems with pump transients
Systems with control valve transients
Systems with relief valve transients
Systems with transient vapor cavitation and column separation
Systems with surge tanks, gas accumulators and/or liquid accumulators
Full featured Windows graphing of transient pressures and flows
On screen color display of transient solutions


AFT Impulse can model a large range of liquid systems including Water
Cryogens
Petroleum
Liquid hydrocarbons
Chemical products
Refrigerants


AFT Impulses powerful solution engine is based on the Method ofCharacteristics solution of the mass and momentum equations. This techniqueaccounts for liquid sonic speed and pipe elasticity.

AFT Impulse uses simple drag and drop operations to build a waterhammermodel of a generalized pipe system. A checklist guides you through the modelbuilding process step by step. Steady and transient pipe system data isentered for components through Specifications windows, which are opened bydouble clicking the component of interest. Additional global editingfeatures simplify making large scale changes to the model.

AFT Impulse handles both traditional English and SI systems of units. Unitsfor each input parameter are chosen from extensive lists.

AFT Impulse generates numerous output reports and graph types, all of whichare customizable. All printed output is of report quality. An innovativeVisual Results window shows the transient solution in motion color.

Technical Capabilities
Solves waterhammer/surge transients in general pipe networks
Handles branches, loops and open or closed systems
Maximum 1000 pipes, 315 junctions
Uses Method of Characteristics solution method
Models pump transients
Models control valve transients
Models relief valve transients
Models vapor cavitation and liquid column separation
English and SI Units supported
Can import of AFT Fathom steady flow results to initialize the model


Interface Feature
Drag and drop modeling from customizable palette of pipe system components
Flexible choices for engineering units
Full user database support for all components, including private and
shared databases
User specified fluids and pipe materials
Customizable output
Print Preview for all printing
Full featured Windows graph preparation
Color replay of transient solutions
Comprehensive, context sensitive Windows Help system
Batch mode run option

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