DESIGNING THE GEOMETRY OF A GAS TURBINE EXHAUST DIFFUSER ON THE BASIS OF FLUID DYNAMICS INFORMATION

摘要

A computer-implemented method for designing a gas turbine exhaust diffuser includes a computer identifying an initial diffuser design and performing a design refinement process. The design refinement process includes generating a new diffuser design by modifying the initial diffuser design according to one or more objective functions and one or more design constraints. A fluid velocity pattern associated with the new diffuser design is determined and used to compute particle tracing lines through an internal portion of the new diffuser design. The particle tracing lines are grouped into particle line bundles extending longitudinally within the new diffuser design and an average path is computed for each particle line bundle. Then, for each respective average path, a rigid tube capable of channeling gases through the internal portion of the new diffuser design is generated and added to the new diffuser design.

主权项

1. A computer-implemented method for designing a gas turbine exhaust diffuser, the method comprising:
identifying, by a computer, an initial diffuser design; performing, by the computer, a design refinement process comprising: generating a new diffuser design by modifying the initial diffuser design according to one or more objective functions and one or more design constraints; determining a fluid velocity pattern associated with the new diffuser design; computing a plurality of particle tracing lines through an internal portion of the new diffuser design using the fluid velocity pattern; grouping the plurality of particle tracing lines into a plurality of particle line bundles extending longitudinally within the new diffuser design; compute a plurality of average paths, each average path corresponding to one of the particle line bundles; for each respective average path, generating a rigid tube capable of channeling gases through the internal portion of the new diffuser design; and adding each rigid tube to the new diffuser design.