Flameless combustion with liquid fuel: A review focusing on fundamentals and gas turbine application

Xing, Fei; Kumar, Arvind; Huang, Yue; Chan, Shining; Ruan, Can; Gu, Sai; Fan, Xiaolei

doi:10.1016/j.apenergy.2017.02.010

Cited by 121 publications

(39 citation statements)

References 52 publications

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“…Calculations were applied according to the steady time solver. Modelling of non-premixed burners is commonly performed for applications such as burners for gas turbines, large scale oil burners, and internal combustion engines [11,26,40]. To the best of our knowledge, we believe that this is the first work using an advanced numerical modelling tool to analyze and identify key parameters for design and optimization of small-scale non-premixed diesel burners for heater application.…”

Section: Modellingmentioning

confidence: 99%

Modelling and Optimization of a Small Diesel Burner for Mobile Applications

et al. 2018

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While extensive research has been done on improving diesel engines, much less has been done on auxiliary heaters, which have their own design challenges. The study analyzes how to optimize the combustion performance of an auxiliary heater, a 6 kW diesel burner, by investigating key parameters affecting diesel combustion and their properties. A model of a small diesel heater, including a simulation of fuel injection and combustion process, was developed step-wise and verified against experimental results that can be used for scaling up to 25 kW heaters. The model was successfully applied to the burner, predicting the burner performance in comparison with experimental results. Three main variables were identified as important for the design. First, it was concluded that the distance from the ring cone to the nozzle is essential for the fluid dynamics and flame location, and that the ring cone should be moved closer to the nozzle for optimal performance. Second, the design of the swirl co-flow is important, and the swirl number of the inlet air should be kept above 0.6 to stabilize the flame location for the present burner design. Finally, the importance of the nozzle diameter to avoid divergent particle vaporization was pointed out.

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Section: Modellingmentioning

confidence: 99%

Modelling and Optimization of a Small Diesel Burner for Mobile Applications

et al. 2018

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“…13 Diesel can be used as a backup fuel in many multifuel gas turbines 4 and also was investigated in flameless combustion for gas turbine applications. 14 The recognition of MGT in recent times shows that it is one of the best mobile power sources in the near future for diverse applications due to its high portability and power density. 15 Turbocharger-based MGT fuelled by biomass syngas showed promising potential for low-cost rural areas heat and power applications.…”

Section: Introductionmentioning

confidence: 99%

Liquid fuels spray and combustion characteristics in a new micro gas turbine combustion chamber design

2019

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Summary Experimental nozzle spray analysis of different nozzle sizes was performed to investigate the effect of the spray profile on combustion quality. Detailed numerical investigation analysis investigated the effect of discrete phase model (DPM) on liquid fuel atomization and combustion characteristics. Four injectors of 2.98, 5.95, 8.93, and 11.90 kg/h nominal capacities numbered from 1 to 4 were tested on new micro gas turbine (MGT) chamber designed especially for liquid biofuels. The fuel was tested in the range of 2.36 to 9.43 kg/h achieving stable turbine operation in the pressure range of 0.1 to 1 bar. Stable operation was achieved for injector number 2 in the range of 0.1 to 0.5 bar compared with 0.2 to 0.6 bar for injector number 3 and 0.5 to 1 bar for injector number 4, while the smallest injector number 1 was not operational above 0.1 bar. The experimental results produced favourable low CO emissions of 95 ppm, NOx emission of 31 ppm, and average turbine inlet temperature (TIT) of 1316 K at maximum pressure. The numerical simulation with DPM using similar injector and operating conditions showed good agreement with the experimental results averaging CO emissions of 99 ppm and NOx of 13 ppm at TIT of 1329 K.

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“…2 It uses heat recuperation concept for preheating the oxidizer to enhance the efficiency of the combustion system. [4][5][6] However, several investigations 7-10 on producer gas (PG) flameless combustion have been found, in spite of its significance as an alternative gas fuel for the power and heat generations. Flameless combustion has been extensively applied to gaseous and liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

“…Flameless combustion has been extensively applied to gaseous and liquid fuels. [4][5][6] However, several investigations 7-10 on producer gas (PG) flameless combustion have been found, in spite of its significance as an alternative gas fuel for the power and heat generations. 11 The raw PG generated by gasification process is a hot-dirty gas (high tar and particulate contamination), where extra cleaning and cooling stages are required before the gas is being used in some downstream processes.…”

Section: Introductionmentioning

confidence: 99%

Swirl flow field analysis of producer gas premixed charge in a flameless cyclone combustor

2018

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Summary The flow dynamics of producer gas premixed charge in a cyclone combustor was investigated using the computational fluid dynamic modeling. Two main variables to achieve high swirl flow and reactant dilution were the flow rate of the reactants and nozzle diameter. The first variable showed a considerable effect on the in‐combustor residence time reducing from 0.64 to 0.44 seconds when the reactant flow rate increases from 0.037 to 0.057 kg/second. While its effect on the swirl flow distribution and flameless conditions was not significant, as indicated by the steady swirl number and reactant dilution degree averaging 2.5% and 58%, respectively. On the other hand, decreasing the nozzle diameter from 50 to 20 mm was more beneficial for the enhancement of reactant dilution and swirl flow distribution as they increased from 58% to 78% and 2.5 to 3.4, respectively. The result also showed that reducing the nozzle diameter below 40 mm is suitable for the present configuration of the combustor to be effectively operated in flameless combustion mode. However, the smallest diameter (20 mm) resulted in more fluctuations of the axial velocity profile, which may lead to highly turbulent fluid dynamic features.

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Flameless combustion with liquid fuel: A review focusing on fundamentals and gas turbine application

Cited by 121 publications

References 52 publications

Modelling and Optimization of a Small Diesel Burner for Mobile Applications

Modelling and Optimization of a Small Diesel Burner for Mobile Applications

Liquid fuels spray and combustion characteristics in a new micro gas turbine combustion chamber design

Swirl flow field analysis of producer gas premixed charge in a flameless cyclone combustor

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