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Research Papers: Energy Systems Analysis

Swirl Injector for Premixed Combustion of Hydrogen–Methane Mixtures

[+] Author and Article Information
Razvan Carlanescu

Romanian Research and Development
Institute for Gas Turbines COMOTI,
220 D Iuliu Maniu Bd., sector 6,
code 061126, OP 76, CP174,
Bucharest, Romania
e-mail: razvan.carlanescu@comoti.ro

Tudor Prisecaru

“Politehnica” University of Bucharest,
The Faculty of Mechanical
Engineering and Mechatronics,
Splaiul Independentei nr. 313, sector 6, RO-060042,
Bucharest, Romania
e-mail: tudor.prisecaru@upb.ro

Malina Prisecaru

“Politehnica” University of Bucharest,
The Faculty of Mechanical
Engineering and Mechatronics,
Splaiul Independentei nr. 313, sector 6, RO-060042,
Bucharest, Romania
e-mail: malina.prisecaru@upb.ro

Iuliana Soriga

“Politehnica” University of Bucharest,
The Faculty of Mechanical
Engineering and Mechatronics,
Splaiul Independentei nr. 313, sector 6, RO-060042,
Bucharest, Romania
e-mail: iulia.soriga@upb.ro

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received December 14, 2016; final manuscript received January 19, 2018; published online February 27, 2018. Editor: Hameed Metghalchi.

J. Energy Resour. Technol 140(7), 072002 (Feb 27, 2018) (9 pages) Paper No: JERT-16-1506; doi: 10.1115/1.4039267 History: Received December 14, 2016; Revised January 19, 2018

In the field of combustion, a special attention was given lately especially to the search for new, greener and more efficient fuels. Among them, hydrogen is intensely studied worldwide as a possible alternative fuel since new ways for producing and transporting it developed lately. Different studies are trying to confirm the possibility of the hydrogen transport using the existing natural gas distribution network, by mixing the two gases. Because the properties of the new mixture influence the combustion parameters, using the existing equipment would face new problems, like the risk of flashback, the effects of higher temperatures, and the modification of the flame front. Hence, new solutions are needed. In this context, this paper presents a newly developed and patented type of injector, designated for the combustion of the premixed hydrogen–methane fuel in various proportions. Based on the characteristics and dimensions of an existing combustion chamber of a gas turbine, different types of injectors were numerically simulated and compared. After the analysis of the results, the preliminary conclusions lead to a first swirl injector made from titanium alloy. The new type of swirled injector was tested on a cheap, simplified low pressure rig, designed to have similar dimensions to the initial combustion chamber, for preliminary validation of the main characteristics and of the stability of the new injector. The experiments indicated good lean blowout characteristics, and the promising results are encouraging for more future tests on a complex experimental setup, for optimizing the final solution.

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Figures

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Fig. 1

The combustion chamber of Garrett GTP 30-67 gas turbine engine

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Fig. 2

Mean temperature field in a longitudinal plane along the combustor axis—different fuel composition cases

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Fig. 3

The selection and calculation of the equivalent sections for the new type of injector

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Fig. 4

Swirled injector—Classical type

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Fig. 5

Swirled injector—New type [33]

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Fig. 6

Numerical simulations for the two types of swirled injectors: (a) classic type and (b) new type

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Fig. 7

Low pressure experimental setup

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Fig. 8

Air flow determination—different regimens

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Fig. 9

Measurements at the output for low pressure experiments (100% CH4)

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Fig. 10

Experimental setup (100% CH4)

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Fig. 11

Experiment running at 1117 °C

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Fig. 12

Recording with infrared thermo-vision special camera

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Fig. 13

Open air testing of the swirl injector

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Fig. 14

The possibility of supplementary combustion by injecting fuel and air between the little flamelets

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Fig. 15

The difference in shape for the two types of injectors: (a) classic type and (b) new type

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