Influence of injection mode on the combustion characteristics of slight temperature rise combustion in gas turbine combustor with cavity

Zhang, Rongchun; Huang, Xiaoli; Fan, Weijun; Bai, Ning

doi:10.1016/j.energy.2019.04.223

Cited by 22 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…erefore, the heat loss to the surrounding environment will increase, and the heat cannot be trapped in the combustor chamber. At the same time, as the increase of methane intake concentration will reduce the temperature in the combustor chamber, if the intake concentration is properly adjusted according to the real-time temperature feedback from the monitoring system, the heating time can be shortened [32][33][34].…”

Section: Temperature Rise Test Of Heat Storage Oxidationmentioning

confidence: 99%

Combustion of Low‐Concentration Gas in a Porous Media Burner: Reactor Design and Optimization

Chen

Wen

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

In order to utilize the low-concentration gas directly discharged into the atmosphere from 1.1% to 1.50% in coal mine production, the heat storage and oxidation equipment of gas was improved, and the heat storage and safety of gas under high-temperature environment were tested. The experimental results show that the regenerative oxidation system could provide a high-temperature oxidation environment of 1000°C for gas oxidation after changing the heating mode and enhancing the sealing property. The pressure curves of air and gas in the burner were similar. With the increase of gas concentration, the pressure difference between inlet and outlet tended to increase linearly with a minimum pressure differential of 4 kPa (air) and a maximum pressure differential of 11 kPa (1.50% gas). The internal pressure was relatively stable without an instantaneous pressure surge or explosion. The result of this study provides a reference for further research on the low-concentration gas regeneration oxidation unit at high temperatures.

show abstract

Section: Temperature Rise Test Of Heat Storage Oxidationmentioning

confidence: 99%

Combustion of Low‐Concentration Gas in a Porous Media Burner: Reactor Design and Optimization

Chen

Wen

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…As current aeroengine technology advances towards higher temperatures [1][2][3], heat capacity, and efficiency [4,5], the oxygen content in the incoming flow of the afterburner is reduced significantly. The decline in oxygen content significantly affects the combustion reaction rate and flame propagation speed, thus resulting in significant changes in the combustion dynamics, including vortex-flame interactions, vortex-shedding patterns, flame morphology, exothermicity, and pressure pulsations, which significantly affect the combustion efficiency, flame stability, and burn flammability limits [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on the Dynamics of Bluff-Body Flames under Oxygen-Lean Conditions

Deng,

Zhao,

Qin

et al. 2023

Energies

View full text Add to dashboard Cite

As modern aeroengine combustors advance towards high temperatures, afterburners are inevitably affected by diminished oxygen content in incoming flows, thus affecting combustion efficiency, instability, and flammability limits. In this study, the dynamic combustion characteristics of V-shaped bluff body-stabilised diffusion flames were investigated using a large eddy simulation method with an oxygen mass fraction range of 14–23% and temperatures ranging from 900 to 1100 K. The results show the significant effects of oxygen content and inflow temperature on the flame/flow behaviours downstream of the bluff-body flame holder. In a separated shear layer, two distinct modes of flow/flame shedding are observed when varying the oxygen content and inflow temperature. The results show that BVK instability governs the far-field wake flow/flame features, whereas the oxygen concentration and temperature significantly affect their oscillation amplitudes. In addition, variations in the incoming oxygen content and temperature shift the axial position of the transition from KH instability to BVK instability. Finally, a spectral analysis is conducted to investigate the characteristics of pressure and heat release pulsations under different scenarios. This study highlights the importance of oxygen content on the combustion dynamics of bluff body-stabilised diffusion flames at various temperatures, which is essential for optimising combustion efficiency and stability in practical applications.

show abstract

“…Thrust-to-weight ratio is a comprehensive index to measure the performance level and working ability of aero engines. One of the main ways to improve the thrust-to-weight ratio of modern aero engines is to increase the outlet temperature of the combustion chamber (Zhang et al, 2019). As the temperature rises, turbine blades and vanes need to bear a greater thermal load.…”

Section: Introductionmentioning

confidence: 99%

A Fast Tomographic Reconstruction Method for Flame Temperature Distribution Measurement Based on Direct Solution Algorithm

Zhang

Peng

et al. 2021

Front. Energy Res.

View full text Add to dashboard Cite

The rapid and accurate measurement of the flame temperature distribution is of great significance to the structural design and health diagnosis of the engine. Aiming at the low reconstruction efficiency of traditional flame temperature distribution reconstruction algorithms, a Direct Solution algorithm for flame temperature distribution reconstruction is proposed in this paper based on the structural characteristics of the reconstruction equations. By setting several numerical cases, the performance of the Direct Solution algorithm and some commonly used traditional algorithms, such as Simultaneous Algebraic Reconstruction Technique (SART), Least Squares QR-factorization (LSQR) algorithm, Non-Negative Least Squares QR-factorization (NNLS) algorithm, is compared in the reconstruction of the flame temperature distribution. The results show that the efficiency of the Direct Solution method is 169.4, 7.4, and 3483.3 times higher than that of the SART, LSQR, and NNLS algorithms under the condition of 40 × 40 grids. In addition, with the increase of the number of grids, the growth rate of the reconstruction time of the Direct Solution algorithm is much lower than that of other algorithms. The overall reconstruction accuracy of the Direct Solution algorithm is better than that of SART and LSQR algorithms. This shows that it has an excellent comprehensive performance and has a great application prospect in the rapid reconstruction of the temperature distribution.

show abstract

Influence of injection mode on the combustion characteristics of slight temperature rise combustion in gas turbine combustor with cavity

Cited by 22 publications

References 17 publications

Combustion of Low‐Concentration Gas in a Porous Media Burner: Reactor Design and Optimization

Combustion of Low‐Concentration Gas in a Porous Media Burner: Reactor Design and Optimization

Numerical Simulation Study on the Dynamics of Bluff-Body Flames under Oxygen-Lean Conditions

A Fast Tomographic Reconstruction Method for Flame Temperature Distribution Measurement Based on Direct Solution Algorithm

Contact Info

Product

Resources

About