Extension of Single-Pipe Methods to Networks
Methods to solve the single pipe equations are available in the literature (
To address these issues, AFT Arrow incorporates unique methods of relating the various thermodynamic and fluid dynamic parameters to each other resulting in a solution methodology that is fast and offers good convergence characteristics. AFT Arrow's methods maintain the integrity of single pipe methods while preserving the required mass and energy balances at all branch points.
The specific techniques used by AFT Arrow to obtain solutions to the equations of compressible flow are proprietary and probably of little interest to the user. What the user will be most interested in is what equations are solved (so that results can be cross-checked) and what balances are calculated at branch points. Therefore, sufficient information is provided to enable users to verify results, while the proprietary aspects of AFT Arrow's solution methods are not described.