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Download Applied Flow Technology Impulse 4.0.2013.07.03
Waterhammer/Surge Transient Pipe Flow Network Analysis. 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 Impulse 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. In addition to time varying fluid dynamics, AFT Impulse can calculate transient hydraulic forces on piping for use in calculating pipe stresses and even generate a CAESAR II force file for direct importation to this popular pipe stress analysis tool.