Experimental Study of Atomization Characteristic of Air Blast Atomizer

2011 ◽

Vol 354-355 ◽

pp. 488-491

Author(s):

Kai Liu ◽

Bao Cheng Zhang ◽

Hong An Ma

Keyword(s):

Experimental Data ◽

Gas Turbine ◽

Test Methods ◽

Spray Angle ◽

Fuel Injector ◽

Heavy Duty ◽

Group Design ◽

Design Requirements ◽

Heavy Duty Gas Turbine ◽

Reliable Basis

Experimental investigation results of the fuel injector group in a heavy-duty gas turbine are presented. Atomization characteristic has great impact about combustion, inflame, temperature field of outlet. Obtained atomization characteristic about spray particle size and spray angle using LDV/PDPA system, determined dimension of injector group. On the basis of these tests, the combustion testing of the injector group in the flame tube is made, its every targets are arrived in the design requirements. This has demonstrated: the test systems and test methods are practical, feasible and reliable. These experimental data have provided the reliable basis for the injector group design and development.

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Experimental Study on the Atomization Behavior of Fuel Nozzle of Low Pollution

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.66-68.307 ◽

2011 ◽

Vol 66-68 ◽

pp. 307-310

Author(s):

Xu Li ◽

Kai Liu

Keyword(s):

Experimental Data ◽

Experimental Study ◽

Combustion Efficiency ◽

Outlet Temperature ◽

Design Development ◽

Heavy Duty ◽

Group Design ◽

Fuel Nozzle ◽

Heavy Duty Gas Turbine ◽

Reliable Basis

Experimental investigation results of the fuel nozzle group in a heavy-duty gas turbine are presented. Atomization characteristic has great impact about combustion efficiency, ignition performance, and outlet temperature field of combustor. Obtained atomization characteristic about spray particle size and distribution using LDV/PDPA system. These experimental data have provided reliable basis for the nozzle group design, development and operation.

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Experimental Study on Pollution Emissions of the DLN Combustor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.138-139.958 ◽

2011 ◽

Vol 138-139 ◽

pp. 958-961

Author(s):

Xu Li ◽

Kai Liu

Keyword(s):

Experimental Study ◽

Gas Turbine ◽

Combustion Efficiency ◽

Test System ◽

Heavy Duty ◽

Pressure Test ◽

Design Requirements ◽

Heavy Duty Gas Turbine ◽

Pollution Emissions ◽

Reliable Basis

Experimental study of combustor of heavy-duty gas turbine (E) which is the first independent intellectual property rights has been finished on high-pressure test system by China Gas Turbine Establishment of AVIVI. The content of CO and UHC are very low, the combustion is stable and efficient, the combustion efficiency is over 99%; pollution emissions (NOx) are 225mg/m3 (15%O2) under rated condition, which is not meet the design requirements. The results indicated: The radio of on-watch-fuel is large, which makes the content of NOx is large; uneven premixed fuel is another important reason that makes the content of NOx is large. The conclusion has provided the reliable basis for gas turbine’s design and development.

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Integrated Experimental and Numerical Approach for Fuel-Air Mixing Prediction in a Heavy-Duty Gas Turbine LP Burner

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.1378297 ◽

2000 ◽

Vol 123 (4) ◽

pp. 803-809 ◽

Cited By ~ 2

Author(s):

G. Mori ◽

S. Razore ◽

M. Ubaldi ◽

P. Zunino

Keyword(s):

Experimental Data ◽

Gas Turbine ◽

Numerical Procedure ◽

Turbulence Models ◽

Mie Scattering ◽

Optical Measurements ◽

Heavy Duty ◽

Experimental Apparatus ◽

Air Mixing ◽

Heavy Duty Gas Turbine

An integrated experimental-numerical procedure has been developed for fuel-air mixing prediction in a heavy-duty gas turbine burner. Optical measurements of the degree of mixing have been performed in a full-scale test rig operating with cold flow. Experimental data have been utilized to validate a CFD RANS numerical model. In fact, it is recognized that the turbulence behavior of jets in swirling air-flow stream is not accurately described by standard k-ε turbulence models; therefore advanced turbulence models have been assessed by means of experimental data. The degree of mixing between simulated fuel and air streams has been evaluated at the burner exit section by means of a planar Mie scattering technique. The experimental apparatus consists of a pulsed Nd:YAG laser and a high resolution CCD video camera connected to a frame grabber. The acquired instantaneous images have been processed through specific procedures that also take into account the laser beam spatial nonuniformity. A second-order discretization scheme with a RSM turbulence model gives the best accordance with the experimental data. Such CFD model will be part of a more general method addressed to numerical prediction of turbulent combustion flames in LP technology.

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Multiobjective Optimization for Duct and Strut Design of an Annular Exhaust Diffuser

Volume 8: Turbomachinery, Parts A, B, and C ◽

10.1115/gt2012-69211 ◽

2012 ◽

Author(s):

Philipp Schaefer ◽

Willy H. Hofmann ◽

Peter-Anton Gieß

Keyword(s):

Experimental Data ◽

Multiobjective Optimization ◽

Evolutionary Strategies ◽

Test Model ◽

Heavy Duty ◽

Aerodynamic Optimization ◽

Inlet Conditions ◽

Heavy Duty Gas Turbine ◽

Set Up ◽

The Impact

This paper describes the aerodynamic optimization of a typical exhaust diffuser for a heavy duty gas turbine. The objective is to maximize diffuser performance and, in this way, pressure recovery by optimizing the geometry for two given inlet conditions. To validate and adjust the numerical set-up, experimental data from measurements on the test model is used. The numerical results obtained by using TRACE compares with the experimental results. An optimization process is applied using the framework AutoOpti developed by DLR, which combines evolutionary strategies with surrogate models in order to select optimal geometric parameters. Finally, the differences between the baseline and several optimized designs are discussed and the impact of different parameters on diffuser performance is demonstrated.

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Preliminary CFD Study on the Effect of Fuel Injector Coking on Fuel Spray Characteristics

Volume 1: Compressors, Fans and Pumps; Turbines; Heat Transfer; Combustion, Fuels and Emissions ◽

10.1115/gtindia2017-4838 ◽

2017 ◽

Author(s):

Parash Agarwal ◽

Vishal Sethi ◽

Pierre Q. Gauthier ◽

Xiaoxiao Sun ◽

Yize Liu

Keyword(s):

Experimental Data ◽

Cone Angle ◽

Coke Formation ◽

Spray Angle ◽

Fuel Spray ◽

Multiphase Model ◽

Fuel Injector ◽

Spray Characteristics ◽

Spray Cone ◽

Carbonaceous Particles

Fuel injector coking involves deposit formation on the external or the internal surfaces of an injector or nozzle. This deposition of carbonaceous particles can result in uneven fuel-spray characteristics or localised burning (hot spots), which may eventually lead to mechanical failure or simply have a detrimental effect on the combustion system. This study focuses on the use of numerical methods to investigate the effect of coke formation on both the atomiser internal flow passages and its spray characteristics. Three different cases are examined; one investigating the clean injector; the second investigating the effect of internal coking; and the third investigating the effect of nozzle tip coking. A pressure swirl atomiser was considered for the purpose of the study. Validation of the numerical results for the clean injector condition is carried out against published experimental data. Two arbitrary geometries of coke deposits were created. The Volume of Fluid (VOF) multiphase model has been used in conjugation with a Geometrical Reconstruction Scheme (GRS) to simulate the interface representing the two phases. Spray cone angle and the liquid film thickness for the clean injector condition predicted by numerical simulation agreed well with the experimental data. Instabilities in the air core and the spray angle were also observed because of the presence of coke layers. Fouling present on the injector tip resulted in an earlier breakup of the film which can thereby affect the flame lift-off length. These stated observations can have significant implications both on the performance as well as the life of the combustion systems, thereby establishing the relevance of this study.

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Integrated Experimental and Numerical Approach for Fuel-Air Mixing Prediction in a Heavy-Duty Gas Turbine LP Burner

Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations ◽

10.1115/2000-gt-0122 ◽

2000 ◽

Author(s):

Giulio Mori ◽

Sandro Razore ◽

Marina Ubaldi ◽

Pietro Zunino

Keyword(s):

Experimental Data ◽

Gas Turbine ◽

Numerical Procedure ◽

Turbulence Models ◽

Mie Scattering ◽

Optical Measurements ◽

Heavy Duty ◽

Experimental Apparatus ◽

Air Mixing ◽

Heavy Duty Gas Turbine

An integrated experimental-numerical procedure has been developed for fuel-air mixing prediction in a heavy-duty gas turbine burner. Optical measurements of the degree of mixing have been performed in a full-scale test rig operating with cold flow. Experimental data have been utilized to validate a CFD RANS numerical model. In fact, it is recognized that the turbulence behavior of jets in swirling air-flow stream is not accurately described by standard k-ε turbulence models; therefore advanced turbulence models have been assessed by means of experimental data. The degree of mixing between simulated fuel and air streams has been evaluated at the burner exit section by means of a planar Mie scattering technique. The experimental apparatus consists of a pulsed Nd:YAG laser and a high resolution CCD video camera connected to a frame grabber. The acquired instantaneous images have been processed through specific procedures that also take into account the laser beam spatial non-uniformity. A second order discretization scheme with a RSM turbulence model gives the best accordance with the experimental data. Such CFD model will be part of a more general method addressed to numerical prediction of turbulent combustion flames in LP technology.

Download Full-text