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Applied Flow Technology Impulse 3.0.2004.10.20

Buy!Download Size: 26.44 MB

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.


- 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

Applied Flow Technology Impulse 3.0.2004.10.20

Buy!Download Size: 26.44 MB

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