Large-Eddy Simulation of Reacting Flow in a Turbine Stage
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866911555660021760 |
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| author | Zhu, Yalu Liu, Feng Sirignano, William A. |
| author_facet | Zhu, Yalu Liu, Feng Sirignano, William A. |
| contents | An in-house large-eddy simulation (LES) code is applied to compute the chemically reacting flow in a turbine stage to analyze the influence of fuel injection and combustion on its aerodynamic and thermodynamic performance. Two reacting cases--with four and sixteen fuel injectors at the inlet for each stator passage--are computed and compared against two nonreacting cases, one with four fuel injectors and the other without. The turbine-stage analyses indicate viability for the turbine-burner concept. Fuel injection and combustion have minimal influence on the total-pressure loss in the stage. The mass flow rates in the two reacting cases are reduced by 7% and 8% relative to the nonreacting cases, respectively. Compared with the baseline nonreacting case, the turbine-stage work per unit mass increases by 8.5% and 11.5% in the two reacting cases, while the residual work rises by 17.3% and 16.0%, respectively. The two reacting cases exhibit a 14.5% increase of overall work, with a thermal efficiency of 44% for the fuel injection, which is comparable to the overall thermal efficiency of modern gas-turbine engines. Local high temperature on the rotor blade is suppressed by using a more uniform spanwise distribution of fuel injectors. The work extraction process of a turbine-burner is theoretically analyzed from both thermodynamic and mechanical views, providing guidance for future turbine-burner design. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_28797 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Large-Eddy Simulation of Reacting Flow in a Turbine Stage Zhu, Yalu Liu, Feng Sirignano, William A. Fluid Dynamics An in-house large-eddy simulation (LES) code is applied to compute the chemically reacting flow in a turbine stage to analyze the influence of fuel injection and combustion on its aerodynamic and thermodynamic performance. Two reacting cases--with four and sixteen fuel injectors at the inlet for each stator passage--are computed and compared against two nonreacting cases, one with four fuel injectors and the other without. The turbine-stage analyses indicate viability for the turbine-burner concept. Fuel injection and combustion have minimal influence on the total-pressure loss in the stage. The mass flow rates in the two reacting cases are reduced by 7% and 8% relative to the nonreacting cases, respectively. Compared with the baseline nonreacting case, the turbine-stage work per unit mass increases by 8.5% and 11.5% in the two reacting cases, while the residual work rises by 17.3% and 16.0%, respectively. The two reacting cases exhibit a 14.5% increase of overall work, with a thermal efficiency of 44% for the fuel injection, which is comparable to the overall thermal efficiency of modern gas-turbine engines. Local high temperature on the rotor blade is suppressed by using a more uniform spanwise distribution of fuel injectors. The work extraction process of a turbine-burner is theoretically analyzed from both thermodynamic and mechanical views, providing guidance for future turbine-burner design. |
| title | Large-Eddy Simulation of Reacting Flow in a Turbine Stage |
| topic | Fluid Dynamics |
| url | https://arxiv.org/abs/2603.28797 |