A Novel Methodology for Calculating Combustion Characteristics Across the Combustion Zone Length

Wisam Yousef, Ziwan Li (), Kai Zhou () and Jianping Yan
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Wisam Yousef: School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310013, China
Ziwan Li: Institute for Aero Engine, Tsinghua University, Beijing 100084, China
Kai Zhou: School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310013, China
Jianping Yan: School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310013, China

Energies, 2025, vol. 18, issue 6, 1-19

Abstract: This paper introduces a novel mathematical model designed to determine combustion characteristics across the length of the combustion zone, underpinned by logical theoretical foundations and demonstrating notable alignment with experimental findings. The model facilitates the calculation of combustion efficiency based on inlet flow parameters (temperature, pressure, velocity, length, porosity, and air excess ratio), achieving efficiencies beyond conventional limits (η = 0.98–0.99) and reaching high values (η = 0.999–0.9999), which is crucial for optimizing low-emission combustors. Verification of the mathematical model was conducted through a dual approach: experimental validation and computational fluid dynamics (CFD) simulations. Comparative analysis revealed a high degree of consistency among theoretical predictions, CFD results, and experimental data, particularly for temperature and combustion efficiency distributions along the combustor length. This robust agreement affirms the model’s accuracy, reliability, and utility in advancing combustion research and developing efficient, low-emission combustors.

Keywords: air excess ratio; combustion efficiency; combustion temperature; computational fluid dynamics; air compressor pressure; air compressor temperature; air inlet mass flow rate; main fuel inlet mass flow rate (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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