Characterization of Forced Flame Response of Swirl-Stabilized Turbulent Lean-Premixed Flames in a Gas Turbine Combustor

Cited 78 time in webofscience Cited 0 time in scopus
  • Hit : 468
  • Download : 0
Flame transfer function measurements of turbulent premixed flames are made in a model lean-premixed, swirl-stabilized, gas turbine combustor. OH*, CH*, and CO(2)* chemiluminescence emissions are measured to determine heat release oscillation from a whole flame, and the two-microphone technique is used to measure inlet velocity fluctuation. 2D CH* chemiluminescence imaging is used to characterize the flame shape: the flame length (L(CH)* (max)) and flame angle (alpha). Using H(2)-natural gas composite fuels, X(H2) = 0.00-0.60, a very short flame is obtained and hydrogen enrichment of natural gas is found to have a significant impact on the flame structure and flame attachment points. For a pure natural gas flame, the flames exhibit a "V" structure, whereas H(2)-enriched natural gas flames have an "M" structure. Results show that the gain of M flames is much smaller than that of V flames. Similar to results of analytic and experimental investigations on the flame transfer function of laminar premixed flames, it shows that the dynamics of a turbulent premixed flame is governed by three relevant parameters: the Strouhal number (St = L(CH)* (max)/L(conv)), the flame length (L(CH)* (max)), and the flame angle (alpha). Two flames with the same flame shape exhibit very similar forced responses, regardless of their inlet flow conditions. This is significant because the forced flame response of a highly turbulent, practical gas turbine combustor can be quantitatively generalized using the nondimensional parameters, which collapse all relevant input conditions into the flame shape and the Strouhal number. [DOI: 10.1115/1.3204532]
Publisher
ASME-AMER SOC MECHANICAL ENG
Issue Date
2010-04
Language
English
Article Type
Article
Keywords

INLET VELOCITY OSCILLATIONS; NONLINEAR RESPONSE; DYNAMICS; FLOW; MODEL; DISTURBANCES

Citation

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME, v.132, no.4

ISSN
0742-4795
DOI
10.1115/1.3204532
URI
http://hdl.handle.net/10203/207576
Appears in Collection
AE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 78 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0