Fully turbulent discrete adjoint solver for non-ideal compressible flow applications
Non-Ideal Compressible Fluid-Dynamics (NICFD) has recently been established as a sector of fluid mechanics dealing with the flows of dense vapors, supercritical fluids, and two-phase fluids, whose properties significantly depart from those of the ideal gas. The flow through an Organic Rankine Cycle...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Global Power and Propulsion Society
2017-11-01
|
| Series: | Journal of the Global Power and Propulsion Society |
| Subjects: | |
| Online Access: | https://www.gppsjournal.org/journals/journal-of-the-global-power-and-propulsion-society/design-method-for-turbomachinery-working-in-the-nicfd-regime/ |
| _version_ | 1819120097998929920 |
|---|---|
| author | Salvatore Vitale Tim A. Albring Matteo Pini Nicolas R. Gauger Piero Colonna |
| author_facet | Salvatore Vitale Tim A. Albring Matteo Pini Nicolas R. Gauger Piero Colonna |
| author_sort | Salvatore Vitale |
| collection | DOAJ |
| description | Non-Ideal Compressible Fluid-Dynamics (NICFD) has recently been established as a sector of fluid mechanics dealing with the flows of dense vapors, supercritical fluids, and two-phase fluids, whose properties significantly depart from those of the ideal gas. The flow through an Organic Rankine Cycle (ORC) turbine is an exemplary application, as stators often operate in the supersonic and transonic regime, and are affected by NICFD effects. Other applications are turbomachinery using supercritical CO2 as working fluid or other fluids typical of the oil and gas industry, and components of air conditioning and refrigeration systems. Due to the comparably lower level of experience in the design of this fluid machinery, and the lack of experimental information on NICFD flows, the design of the main components of these processes (i.e., turbomachinery and nozzles) may benefit from adjoint-based automated fluid-dynamic shape optimization. Hence, this work is related to the development and testing of a fully-turbulent adjoint method capable of treating NICFD flows. The method was implemented within the SU2 open-source software infrastructure. The adjoint solver was obtained by linearizing the discretized flow equations and the fluid thermodynamic models by means of advanced Automatic Differentiation (AD) techniques. The new adjoint solver was tested on exemplary turbomachinery cases. Results demonstrate the method effectiveness in improving simulated fluid-dynamic performance, and underline the importance of accurately modeling non-ideal thermodynamic and viscous effects when optimizing internal flows influenced by NICFD phenomena. |
| first_indexed | 2024-12-22T06:15:15Z |
| format | Article |
| id | doaj.art-99899f3c693848c49b22c2a06fa055e5 |
| institution | Directory Open Access Journal |
| issn | 2515-3080 2515-3080 |
| language | English |
| last_indexed | 2024-12-22T06:15:15Z |
| publishDate | 2017-11-01 |
| publisher | Global Power and Propulsion Society |
| record_format | Article |
| series | Journal of the Global Power and Propulsion Society |
| spelling | doaj.art-99899f3c693848c49b22c2a06fa055e52022-12-21T18:36:06ZengGlobal Power and Propulsion SocietyJournal of the Global Power and Propulsion Society2515-30802515-30802017-11-011110.22261/JGPPS.Z1FVOIFully turbulent discrete adjoint solver for non-ideal compressible flow applicationsSalvatore Vitale0Tim A. Albring1Matteo Pini2Nicolas R. Gauger3Piero Colonna4Propulsion & Power, Delft University of Technology, Kluyverweg 1, Delft, 2629 HS, The NetherlandsScientific Computing, TU Kaiserslautern, Paul-Ehrlich-Strasse 34, Kaiserslautern, 67663, GermanyPropulsion & Power, Delft University of Technology, Kluyverweg 1, Delft, 2629 HS, The NetherlandsScientific Computing, TU Kaiserslautern, Paul-Ehrlich-Strasse 34, Kaiserslautern, 67663, GermanyPropulsion & Power, Delft University of Technology, Kluyverweg 1, Delft, 2629 HS, The NetherlandsNon-Ideal Compressible Fluid-Dynamics (NICFD) has recently been established as a sector of fluid mechanics dealing with the flows of dense vapors, supercritical fluids, and two-phase fluids, whose properties significantly depart from those of the ideal gas. The flow through an Organic Rankine Cycle (ORC) turbine is an exemplary application, as stators often operate in the supersonic and transonic regime, and are affected by NICFD effects. Other applications are turbomachinery using supercritical CO2 as working fluid or other fluids typical of the oil and gas industry, and components of air conditioning and refrigeration systems. Due to the comparably lower level of experience in the design of this fluid machinery, and the lack of experimental information on NICFD flows, the design of the main components of these processes (i.e., turbomachinery and nozzles) may benefit from adjoint-based automated fluid-dynamic shape optimization. Hence, this work is related to the development and testing of a fully-turbulent adjoint method capable of treating NICFD flows. The method was implemented within the SU2 open-source software infrastructure. The adjoint solver was obtained by linearizing the discretized flow equations and the fluid thermodynamic models by means of advanced Automatic Differentiation (AD) techniques. The new adjoint solver was tested on exemplary turbomachinery cases. Results demonstrate the method effectiveness in improving simulated fluid-dynamic performance, and underline the importance of accurately modeling non-ideal thermodynamic and viscous effects when optimizing internal flows influenced by NICFD phenomena.https://www.gppsjournal.org/journals/journal-of-the-global-power-and-propulsion-society/design-method-for-turbomachinery-working-in-the-nicfd-regime/turbomachineryNICFDadjointturbulentshape optimizationalgorithmic differentiation |
| spellingShingle | Salvatore Vitale Tim A. Albring Matteo Pini Nicolas R. Gauger Piero Colonna Fully turbulent discrete adjoint solver for non-ideal compressible flow applications Journal of the Global Power and Propulsion Society turbomachinery NICFD adjoint turbulent shape optimization algorithmic differentiation |
| title | Fully turbulent discrete adjoint solver for non-ideal compressible flow applications |
| title_full | Fully turbulent discrete adjoint solver for non-ideal compressible flow applications |
| title_fullStr | Fully turbulent discrete adjoint solver for non-ideal compressible flow applications |
| title_full_unstemmed | Fully turbulent discrete adjoint solver for non-ideal compressible flow applications |
| title_short | Fully turbulent discrete adjoint solver for non-ideal compressible flow applications |
| title_sort | fully turbulent discrete adjoint solver for non ideal compressible flow applications |
| topic | turbomachinery NICFD adjoint turbulent shape optimization algorithmic differentiation |
| url | https://www.gppsjournal.org/journals/journal-of-the-global-power-and-propulsion-society/design-method-for-turbomachinery-working-in-the-nicfd-regime/ |
| work_keys_str_mv | AT salvatorevitale fullyturbulentdiscreteadjointsolverfornonidealcompressibleflowapplications AT timaalbring fullyturbulentdiscreteadjointsolverfornonidealcompressibleflowapplications AT matteopini fullyturbulentdiscreteadjointsolverfornonidealcompressibleflowapplications AT nicolasrgauger fullyturbulentdiscreteadjointsolverfornonidealcompressibleflowapplications AT pierocolonna fullyturbulentdiscreteadjointsolverfornonidealcompressibleflowapplications |