Impulse is a powerful dynamic simulation and analysis software used to calculate pressure surge transients in liquid piping systems caused by waterhammer. It allows users to easily model a wide range of system components and surge devices, gaining an understanding of the transient response and how valves, pumps, and other components dynamically interact. The software evaluates the effect of pressure surges due to vapor cavity collapse by modeling vapor cavitation and liquid column separation, helping validate the design of safety features to produce safer, more economical pipe systems. Impulse helps avoid potentially catastrophic effects of waterhammer and other undesirable system transients by enabling proper sizing and location of surge equipment like surge tanks, gas accumulators, and relief valves. Users can initiate transients based on time or events, reduce surge magnitudes by adjusting component transients, and animate/visualize waterhammer events for improved understanding. It calculates transient unbalanced forces, defines force sets, and allows specifying design alerts for out-of-range output values. The software supports systems containing fluids such as water, petroleum and refined products, chemicals, cryogens, and refrigerants. Impulse incorporates a steady-state solver for seamless transfer of initial conditions to the transient analysis, determining steady-state solutions using a modified Newton-Raphson matrix iteration. The traditional Method of Characteristics is employed to solve the transient mass and momentum equations of pipe flow.

Features & Benefits

• Advanced Transient Solver
  • Utilizes the Method of Characteristics for accurate transient analysis.
• Built-in Steady-State Solver
  • Automatically initializes waterhammer transients by providing seamless transfer of initial conditions.
• Detailed Pump Inertial Modeling
  • Supports trips and start-ups, including state-of-the-art, four-quadrant methods for comprehensive analysis.
• Extensive Cavitation Modeling
  • Accurately models liquid column separation caused by transient cavitation, including vapor cavity collapse.
• Built-in Libraries
  • Provides comprehensive libraries of fluids and fittings for quick and accurate model building.
• Scenario Manager
  • Enables tracking of all design variants and operational possibilities within a single model file with data linkage.
• Comprehensive Relief Valve Modeling
  • Offers detailed capabilities for modeling and analyzing relief valve performance.
• Integrated Graphing & Reporting
  • Provides tools for dynamically graphing transients, generating reports, and creating video files from animations to share results.
• Force Imbalance File Generation
  • Generates files that can be automatically read into pipe stress dynamic models like CAESAR II ® and TRIFLEX ®.
• Built-in Intelligence
  • Guides users in building more accurate and effective models.