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arXiv · 2603.28797

Large-Eddy Simulation and Performance Analysis of a Continuous-Turbine-Burner Stage

Yalu Zhu·Feng Liu·William A. Sirignano
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Abstract

This paper reports the first large-eddy simulation of 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 analyses indicate viability for the continuous-turbine-burner (CTB) concept, which offers the potential of significant increase of specific power/thrust of a gas-turbine engine without loss of efficiency. Fuel injection and combustion have minimal influence on the total-pressure loss. Compared with the baseline nonreacting case, the 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 and a thermal efficiency of 44% for the fuel injection. 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 CTB is analyzed from both thermodynamic and mechanical views.

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Yalu Zhu, Feng Liu, William A. Sirignano. 2026-09-17. Large-Eddy Simulation and Performance Analysis of a Continuous-Turbine-Burner Stage. https://arxiv.org/abs/2603.28797

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