Numerical study of the parameters of a gas turbine combustion chamber with steam injection operating on distillate fuel

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Serhiy Serbin ◽  
Kateryna Burunsuz
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Mass Flow ◽  
Liquid Fuel ◽  
Numerical Study ◽  
Steam Injection ◽  
Liquid Fuels ◽  
Combustion Chambers ◽  
Mass Flow Rates ◽  
Gas Turbine Combustion

Abstract Investigations of the working process in a gas turbine combustion chamber with ecological and energy steam injection operating on liquid fuel are conducted. The mathematical model of the aerodynamic processes and liquid fuel combustion in similar burning devices based on the numerical solution of the system of conservation and transport equations for a multi-component chemically reactive turbulent system is developed. The influence of the relative steam mass flow rate (the ratio of the sum of the mass flow rates of ecological and energy steam to the fuel consumption) on the combustion chamber’s emission characteristics is determined. The obtained results can be used for parameter selection and optimization of promising high-temperature gas turbine combustion chambers with steam injection operating on liquid fuels.

scholarly journals Numerical study of the parameters of a gas turbine combustion chamber with steam injection operating on distillate fuel

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Serhiy Serbin ◽  
Kateryna Burunsuz
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Mass Flow ◽  
Liquid Fuel ◽  
Numerical Study ◽  
Steam Injection ◽  
Liquid Fuels ◽  
Combustion Chambers ◽  
Mass Flow Rates ◽  
Gas Turbine Combustion

AbstractInvestigations of the working process in a gas turbine combustion chamber with ecological and energy steam injection operating on liquid fuel are conducted. The mathematical model of the aerodynamic processes and liquid fuel combustion in similar burning devices based on the numerical solution of the system of conservation and transport equations for a multi-component chemically reactive turbulent system is developed. The influence of the relative steam mass flow rate (the ratio of the sum of the mass flow rates of ecological and energy steam to the fuel consumption) on the combustion chamber’s emission characteristics is determined. The obtained results can be used for parameter selection and optimization of promising high-temperature gas turbine combustion chambers with steam injection operating on liquid fuels.

scholarly journals Investigations of the Working Process in a Dual-Fuel Low-Emission Combustion Chamber for an FPSO Gas Turbine Engine

2020 ◽  
Vol 27 (3) ◽  
pp. 89-99
Author(s):  
Serhiy Serbin ◽  
Badri Diasamidze ◽  
Marek Dzida
Keyword(s):  
Nitrogen Oxides ◽  
Combustion Chamber ◽  
Gas Turbine ◽  
Liquid Fuel ◽  
Turbulent Flame ◽  
Dual Fuel ◽  
Working Process ◽  
Fuel Supply ◽  
Low Emission ◽  
Gas Turbine Combustion

AbstractThis investigation is devoted to an analysis of the working process in a dual-fuel low-emission combustion chamber for a floating vessel’s gas turbine. The low-emission gas turbine combustion chamber with partial pre-mixing of fuel and air inside the outer and inner radial-axial swirlers was chosen as the object of research. When modelling processes in a dual-flow low-emission gas turbine combustion chamber, a generalized method is used, based on the numerical solution of the system of conservation and transport equations for a multi-component chemically reactive turbulent system, taking into consideration nitrogen oxides formation. The Eddy-Dissipation-Concept model, which incorporates Arrhenius chemical kinetics in a turbulent flame, and the Discrete Phase Model describing the interfacial interaction are used in the investigation. The obtained results confirmed the possibility of organizing efficient combustion of distillate liquid fuel in a low-emission gas turbine combustion chamber operating on the principle of partial preliminary formation of a fuel-air mixture. Comparison of four methods of liquid fuel supply to the channels of radial-axial swirlers (centrifugal, axial, combined, and radial) revealed the advantages of the radial supply method, which are manifested in a decrease in the overall temperature field non-uniformity at the outlet and a decrease in nitrogen oxides emissions. The calculated concentrations of nitrogen oxides and carbon monoxide at the flame tube outlet for the radial method of fuel supply are 32 and 9.1 ppm, respectively. The results can be useful for further modification and improvement of the characteristics of dual-fuel gas turbine combustion chambers operating with both gaseous and liquid fuels.

scholarly journals On the dynamic nature of azimuthal thermoacoustic modes in annular gas turbine combustion chambers

2013 ◽  
Vol 469 (2151) ◽  
pp. 20120535 ◽  
Author(s):  
Nicolas Noiray ◽  
Bruno Schuermans
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Travelling Waves ◽  
Acoustic Measurements ◽  
Combustion Chambers ◽  
Dynamic Nature ◽  
Detailed Statistical Analysis ◽  
Gas Turbine Combustion ◽  
Modal Dynamics ◽  
Good Agreement

This paper deals with the dynamics of standing and rotating azimuthal thermoacoustic modes in annular combustion chambers. Simultaneous acoustic measurements have been made at multiple circumferential positions in an annular gas turbine combustion chamber. A detailed statistical analysis of the spatial Fourier amplitudes extracted from these data reveals that the acoustic modes are continuously switching between standing, clockwise and counter-clockwise travelling waves. A theoretical framework from which the modal dynamics can be explained is proposed and supported by real gas turbine data. The stochastic differential equations that govern these systems have been derived and used as a basis for system identification of the measured engine data. The model describes the probabilities of the two azimuthal wave components as a function of the random source intensity, the asymmetry in the system and the strength of the thermoacoustic interaction. The solution of the simplified system is in good agreement with experimental observations on a gas turbine combustion chamber.

scholarly journals Experience With Large Gas Turbine Combustion Chambers

1982 ◽  
Author(s):  
A. Lienert ◽  
O. Schmoch
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Peak Load ◽  
Combustion Chambers ◽  
Initial Stage ◽  
Gas Turbine Combustion ◽  
Maintenance And Inspection ◽  
Positive Effect ◽  
Base Load

Large gas turbine combustion chambers, being arranged outside of the unit, exhibit quite a lot of advantages with respect to combustion. Moreover, they are characterized by a long life of all components. Thus, in case of such gas turbine units the maintenance and inspection intervals are relatively large being not determined by the combustion chamber or combustion chamber components. There are not many failures. They may easily be recognized at their initial stage and can be eliminated quickly as the inside is accessible via a manhole. This in turn has a positive effect on overall maintenance and service cost. Besides, this easy accessibility allows for a direct examination of the turbine inner casing and the first turbine stages in case of maintenanced works. Experiences are based on the operation of more than 100 gas turbines of such a kind, whereby several have been run at peak load with more than 5000 starts, others at base load with more than 100,000 operating hours.

Premixing Gas and Air to Reduce NOx Emissions With Existing Proven Gas Turbine Combustion Chambers

1986 ◽  
Author(s):  
B. Becker ◽  
P. Berenbrink ◽  
H. Brandner
Keyword(s):  
Gas Turbine ◽  
Nox Reduction ◽  
Combustion Process ◽  
Liquid Fuels ◽  
Nox Emissions ◽  
Combustion Chambers ◽  
Load Range ◽  
Usual Manner ◽  
Low Nox Combustion ◽  
Gas Turbine Combustion

In the case of the burners employed in KWU gas turbine combustion chambers, the entire primary air is supplied through the swirlers associated with the burners. It is thus relatively easy to add natural gas to this air uniformly before it enters the combustion zone. This results in a particularly low NOx combustion process provided that the air to fuel ratio is being maintained within a certain range. The supplementary equipment to premix the fuel and air does not affect the burner performance when the fuel is supplied in the conventional way by means of gas or oil nozzles. Consequently, the gas turbine will be started up and loaded in the usual manner. In the high load range the burners are then switched over to premixed combustion operation. A small amount of fuel through the central gas nozzle stabilizes the flame in the case of a sudden load decrease. Combustion chambers already in service can be retrofitted with the new premixing equipment to reduce NOx emissions to about one third of the original values. The combustors can be operated with liquid fuels together with steam or water for NOx reduction in the conventional way.

Effect of Steam Injection in Gas Turbine Combustion Chamber on the Performance of a Natural Gas Fired Combined Cycle Power Generation Unit

2011 ◽  
Vol 110-116 ◽  
pp. 4574-4577
Author(s):  
Ibrahim Alaefour ◽  
Bale V. Reddy
Keyword(s):  
Power Generation ◽  
Natural Gas ◽  
Combustion Chamber ◽  
Gas Turbine ◽  
Steam Injection ◽  
Combined Cycle ◽  
First Law Of Thermodynamics ◽  
Power Generation Unit ◽  
Gas Turbine Combustion ◽  
Generation Unit

Combined cycle power generation plants are becoming popular to generate power at higher efficiencies with reduced greenhouse gas emissions. In the present work the effect of steam injection in the gas turbine combustion chamber on the performance of a natural gas fired combined cycle power plant is investigated. For a particular combined cycle power generation configuration, the effect of steam injection on the performance is conducted based on first law of thermodynamics. The steam injection influences the work output and efficiencies of gas turbine, steam turbine and combined cycle power generation unit.

Effect of Fuel Injection Angle on Combustion and Emissions Characteristics in Taper Can Gas Turbine Combustion Chamber

2015 ◽  
Author(s):  
D. R. Srinivasan ◽  
Pandurangadu Vootukuri ◽  
A. V. S. S. K. S. Gupta
Keyword(s):  
Nitric Oxide ◽  
Carbon Dioxide ◽  
Combustion Chamber ◽  
Gas Turbine ◽  
Liquid Fuel ◽  
Fuel Injection ◽  
Injection Angle ◽  
Fuel Droplets ◽  
Contour Plots ◽  
Gas Turbine Combustion

The rate of volatility of liquid fuel droplets sprayed in a stream of turbulent swirling air flow inside the taper can gas turbine combustion chamber had greatly affected the combustion and emission performance of the combustor. There had been extensive investigation that was carried out earlier which are both experimental and numerical in nature to improve the fuel volatility. In this paper, a novel method was proposed to predict the influence of fuel injection angle on combustion and emission characteristics in the taper can type combustion chamber. A detailed numerical investigation was carried out by modelling a sector of combustion chamber with an angle of 51.42° and simulated using commercial CFD code by varying the fuel injection angle of liquid fuel droplets sprayed in the gas turbine combustion chamber starting from a minimum angle to the maximum angle where fuel droplets strike the combustor wall. The turbulence model adopted was k–ε model with high Reynolds number and also with standard wall treatment. The combustion in the combustion chamber occurs by non-premixed type of combustion and correspondingly Magnussen’s eddy break-up (EBU) model was selected. The fuel droplets were tracked by using Lagrangian multiphase model due to presence of two phases i.e. air and liquid fuel droplets that were injected in combustion chamber. The droplet breakup model selected was Reitz Diwakar model and for the interactions of fuel droplets with the wall Bai’s model was used. The droplet diameters and probability density functions were defined by using Rosin-Rammler method. All peripheral boundaries were considered as adiabatic in nature. Symmetry boundary conditions were imposed on the sector walls that were separated by 51.42°. The combustion reaction involving liquid fuel and oxidiser with products of combustion as carbon dioxide and water vapour had been defined as a three step reaction. The model was meshed for different cell sizes from 3mm to 8mm with step size of 1mm and checked for grid independency. It was found that results obtained for 3mm and 4mm cell sizes were almost identical. Hence 4mm cell size was considered for investigation due to less computational time. The cases were run for different fuel injection angles. The results obtained were presented in the form of contour plots taken at mid-section in axial direction along the length of the combustor. The graphical values were obtained as the average values at the outlet of combustor. Some of the contour plots that were discussed are plots of carbon dioxide, nitric oxide and soot. It was concluded from the above analysis that variation of fuel injection angle had played a pivotal role which had resulted in better combustion with lower emissions on Nitric Oxide and Soot thereby producing maximum power for minimum amount of fuel burnt.

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