What question did this study set out to answer?

Investigate the underlying mechanisms governing hot streak formation, migration, and exit temperature uniformity under varying fuel distribution conditions in a centrally staged model combustor.

June 1, 2023Physics of Fluids

The effects of fuel distribution on exit temperature distribution in a centrally staged combustor

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Authors

JWJianchen WangBeihang University ZWZhichao WangState Key Laboratory of Building Safety and Built Environment XHXin HuiAero Engine Corporation of China (China)

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Implication

Experimental and numerical modeling reveals that elevated fuel staging increases exit hot streaks in a staged combustor, indicating key operational limits for gas turbine temperature uniformity.

Key Points

Investigate the underlying mechanisms governing hot streak formation, migration, and exit temperature uniformity under varying fuel distribution conditions in a centrally staged model combustor.
Conducted experimental testing on a centrally staged tri-sector model combustor using particle image velocimetry and planar laser-induced fluorescence to characterize flow, spray, and flame structures.
Coupled optical laser diagnostics with numerical simulations to measure and analyze exit temperature distributions.
Increasing the fuel-to-air ratio or fuel staging ratio enhanced the formation of high-temperature hot streaks, increasing both overall and radial temperature distribution factors at the combustor exit.
Hot streaks originated from non-premixed combustion in the pilot stage and stabilized within the shear layer between the pilot stage and primary circulation zone.
Higher fuel-to-air ratios at low power and higher staging ratios at high power enlarged the hot streak area, degrading exit temperature uniformity.

Cite This Study

Wang et al. (2023) studied this question.

synapsesocial.com/papers/6a8200583385b84e88b6d2ea https://doi.org/10.1063/5.0149820

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Implication

Experimental and numerical modeling reveals that elevated fuel staging increases exit hot streaks in a staged combustor, indicating key operational limits for gas turbine temperature uniformity.

The effects of fuel distribution on exit temperature distribution in a centrally staged combustor

Discussion

Member takes

Implication

Key Points

Cite This Study

The effects of fuel distribution on exit temperature distribution in a centrally staged combustor

Discussion

Member takes

Implication

Key Points

Cite This Study

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