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Combustion oscillation: Chemical control showing mechanistic link to recirculation zone purge time

作者:科技文献资料网 时间:2018-10-19 21:48:43  浏览:8120   来源:科技文献资料网
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[唯一标识符]:CDSTIC.DOE.137324
[文献来源]:美国能源部报告数据库
[文献类型]:科技报告
[资源原始索取号]:OSTI ID: 137324 ; ON: DE96002744; NC: NONE
[标题]:Combustion oscillation: Chemical control showing mechanistic link to recirculation zone purge time
[作者]:Gemmen, R.S.; Richards, G.A.; Yip, M.J.; Norton, T.S.
[机构]:USDOE Morgantown Energy Technology Center, WV (United States)
[文摘]:Active control mechanisms are being examined for lean premix combustion applications, such as gas turbine generators. Lean premix combustors are susceptible to large combustion oscillations, particularly when driven very lean to achieve low NOx. While past design work has been focussed on understanding the source of the oscillation and modifying the combustor to avoid such oscillations, commercial combustion designers have more recently considered applying new control elements. As part of the U.S. Department of Energy`s Advanced Gas Turbine Systems Program, the Morgantown Energy Technology Center is investigating various active control techniques. This paper presents results from experiments studying the effect of pilot fuel modulation on combustor oscillation and pollutant emissions for a pilot stabilized dump swirl combustor, typical of gas turbine combustors. The results show that a significant level of attenuation can be achieved in the combustor pressure oscillation (50 to 90 percent) while only moderately affecting pollutant emissions. The control mechanism producing the attenuation is shown to be purely chemical in nature, rather than fluid mechanic. In addition, the frequency region over which control is obtained is shown to be related to the recirculation zone purge time. For this reason, control can be achieved at control frequencies much lower than the frequency of oscillation.
[关键词]:42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES;20 FOSSIL-FUELED POWER PLANTS ; COMBUSTORS; DESIGN; OSCILLATIONS; AIR POLLUTION; FOSSIL-FUEL POWER PLANTS; GAS TURBINES
[出版时间]:1995 Dec 01
[出版年份]:1995
[报告号]:DOE/METC/C--96/7207; CONF-9510246--1
[主办机构]:USDOE, Washington, DC (United States)
[来源]:Conference
[来源关系]:Eastern States Section: The Combusion Institute meeting, Worcester, MA (United States), 16-18 Oct 1995 ; PBD: 1995
[其他获取途径]:OSTI as DE96002744
[国别]:United States
[总页数]:8


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[唯一标识符]:CDSITC.AEROSPACE.A88-44165
[文献来源]:美国航空航天数据库(aerospace)
[资源原始索取号]:A1988-44165; Reference AN: A88-44165
[标题]:Patch antenna quasioptical mixers
[作者]:JACKSON C M
[来源]:Microwave and Optical Technology Letters. vol. 1, March 1988, p. 1 4.
[文摘]:Two novel quasioptical mixers using patch antennas and compact local oscillator (LO) ports are described: a fundamentally pumped mixer with a waveguide LO and a subharmonically pumped mixer with a planar LO. The angular dependence of the antenna patterns, the isotropic conversion loss, and the mixer noise figure are presented. A 7.5-dB noise figure has been measured at 35 GHz for the subharmonically pumped design. The importance of the effective antenna temperature and its effect on the mixer noise figure are discussed. (Author)
[关键词]:MICROSTRIP TRANSMISSION LINES; MICROWAVE OSCILLATORS; MIXING CIRCUITS; SLOT ANTENNAS; ANTENNA RADIATION PATTERNS; ELECTROMAGNETIC NOISE; TEMPERATURE EFFECTS
[出版年份]:1988
[专业领域]:ELECTRONICS AND ELECTRICAL ENGINEERING
[唯一标识符]:CDSTIC.DOE.10193751
[文献来源]:美国能源部报告数据库
[文献类型]:科技报告
[资源原始索取号]:OSTI ID:10193751
[标题]:Programming in Fortran M. Revision 1
[作者]:Foster, I.T.; Olson, R.D.; Tuecke, S.J.
[关键词]:99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; FORTRAN; PROGRAMMING; COMMUNICATIONS; COMPUTER NETWORKS; MODIFICATIONS
[出版时间]:1993 Oct 01
[出版年份]:1993
[报告号]:ANL--93/26-Rev.1
[来源关系]:Other Information: PBD: Oct 1993
[覆盖领域]:Topical
[其他获取途径]:OSTI as DE94002756; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov
[总页数]:63



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