Experimental Investigation of Nox Emission in a Combustor with One and Two Sequential Combustion Stages

被引：2

作者：

Bulysova L.A. ^{[1
]}

Vasil’ev V.D. ^{[1
]}

Gutnik M.M. ^{[1
]}

Gutnik M.N. ^{[1
]}

Berne A.L. ^{[1
]}

Pugach K.S. ^{[1
]}

机构：

[1] OJSC All-Russia Thermal Engineering Institute (OAO VTI), Moscow

来源：

Power Technology and Engineering | 2019年 / 53卷 / 01期

关键词：

air-fuel mixture; experimental investigations; gas turbine; low-emission combustion chamber; nitrogen oxides; parametric studies;

D O I：

10.1007/s10749-019-01037-5

中图分类号：

学科分类号：

摘要：

This article is the first of a cycle dedicated to the experimental investigation and process optimization of the combustion of an air-fuel mixture with gas temperatures at exit from the combustion chamber of approximately 1700 °C, while satisfying the requirements relating to emissions. The article is divided into two stages. The first stage examines the possibilities of obtaining minimal NOx and CO concentrations when using a traditional (single-stage) system for combustion of a prepared air-fuel mixture (AFM). It presupposes the presence of one burner unit (BU) through which fuel and air enter the combustor (COMB), and the combustion process is executed in flame stabilization zones that are formed in it due to swirl generators and/or bluff bodies. For such a system, the effect on NOx and CO emissions over the range of exhaust temperatures from 1300 to 1700°C (CC excess air coefficient from 2.2 to 1.6) from the following was studied: the quality of preparation of the AFM, the pilot burner air, the flow speed in the COMB, and the air temperature at intake. The second stage examined the possibility of reducing harmful emissions due to the use of a two-stage sequential plan of fuel combustion. This presupposes the presence of two BUs, one of which, a traditional one (BU1), is placed at the inlet face of the COMB; and a second, sequential one (BU2), on the side walls of the COMB below the flow. Here, results are produced in testing BU2, in the form of an annular sudden flow constrictor with fuel-injection apertures arranged on its circumference. The total fuel flow is partitioned between the stages. In the first stage, combustion occurs for fuel in the form of the AFM, and in the second the remaining fuel is combusted in the hot flow of gases of the first stage, depleted by oxygen. The effect of the AFM temperature intake to the first stage and the speeds of its feed to the COMB on NOx and CO emissions over the range of exhaust temperatures from 1300 to 1700°C is studied for this system. The results were obtained in tests on a model CC at a test station of JSC VTI. Multivariate parametric studies on this subject were published earlier [1–3]. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

引用

页码：65 / 73

页数：8

共 8 条

[1]

Vasil'Ev V.D., Bulysova L.A., Berne A.L., Methodology for handling the test data regarding instability of combustion, Énergetik, 1, pp. 55-60, (2014)

[2]

Bulysova L.A., Berne A.L., Pugach K.S., Parametric computational studies of the reduction in NO x emissions during combustion of ideal fuel-air mixtures with organization of several stabilization zones, Élektr. Stantsii, 10, pp. 11-20, (2017)

[3]

Bulysova L.A., Berne A.L., Pugach K.S., Parametric computational studies of the reduction of NO x emissions during sequential combustion of an ideal air-fuel mixture, Élektr. Stantsii, 2, pp. 25-31, (2018)

[4]

Bulysova L.A., Berne A.L., Pugach K.S., Parametric computational studies of the reduction of NO<sub>x</sub> emissions with organization of the sequential combustion of fuel with a diffusion second zone, Élektr. Stantsii No., 5, pp. 2-8, (2018)

[5]

Bowman C.T., Chemistry of gaseous pollutant formation and destruction, Fossil Fuel Combustion, pp. 215-260, (1991)

[6]

Karim H., Natarajan J., Naira V., Cai J., Rao S., Kegley J., Citeno J., Staged combustion system for improved emissions operability & flexibility for 7HA class heavy duty gas turbine engine, Proc. of ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition GT2017, (2017)

[7]

Pennell D.A., Bothien M.R., Ciani A., Granet V., Singla G., Thorpe S., Wickstroem A., Oumejjoud K., Yaquinto M., An introduction to the Ansaldo GT36 constant pressure sequential combustor, Proc. of ASME Turho Expo 2017: Turbomachinery Technical Conference and Exposition GT2017, (2017)

[8]

Tanaka R., Koji T., Ryu M., Matsuoka A., Okuto A., Development of high efficient 30MW class gas turbine, the Kawasaki L30A, Proc. of ASME Turho Expo 2012. GT2012, (2012)

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