Waterhammer analysis tools of the past have been noted for being difficult
to use and requiring extensive specialized knowledge. As a result, this
critical aspect of piping system design and operation has often been
overlooked. But no longer. Now AFT ImpulseT offers the ease-of-use of a
drag-and-drop interface and built-in waterhammer modeling expertise. AFT
Impulse helps you design and operate your systems with greater reliability
and safety by avoiding the potentially catastrophic effects of waterhammer
and other undesirable system transients. Piping systems engineers typically
do not have the time to become specialists in waterhammer modeling. Now they
don't have to. Now they can be equipped with the proper tools to design and
analyze 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 a
broad range of waterhammer events, including transient cavitation and
various surge suppression devices. AFT Impulse provides a built-in library
of fluids and fittings, variable model configurations, pump and control
valve modeling and much more. Scenario Manager raises the what-if potential
of waterhammer modeling to a new level. Multiple system configurations
varying by any modeling parameter are easily managed within a single model
file with a familiar hierarchical interface. Changes in the base model are
automatically inherited by alternate design cases.
AFT Impulse incorporates a steady-state solver providing seamless transfer
of initial conditions to the transient analysis. The traditional Method of
Characteristics are employed to solve the transient mass and momentum
equations of pipe flow. Modeling vapor cavitation and liquid column
separation, the effect of pressure surges due to vapor cavity collapse may
be evaluated. Modeling tools for a wide range of system components and surge
devices are included. Transients can be initiated based on time or on events
in the system. For example, a valve closure transient may be initiated when
a specified pressure level is attained at a location. From the powerful
drag-and-drop model building features to the fully customizable output, AFT
Impulse 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 Impulse's powerful solution engine is based on the Method of
Characteristics solution of the mass and momentum equations. This technique
accounts for liquid sonic speed and pipe elasticity.
AFT Impulse uses simple drag-and-drop operations to build a waterhammer
model of a generalized pipe system. A checklist guides you through the model
building process step-by-step. Steady and transient pipe system data is
entered for components through Specifications windows, which are opened by
double-clicking the component of interest. Additional global editing
features simplify making large-scale changes to the model.
AFT Impulse handles both traditional English and SI systems of units. Units
for each input parameter are chosen from extensive lists.
AFT Impulse generates numerous output reports and graph types, all of which
are customizable. All printed output is of report quality. An innovative
Visual 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
Download File Size:26.44 MB
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