Study on Combustion Oscillation of Premixed Flame with Pilot Fuel at Elevated Pressures

Acoustically-coupled combustion oscillation is studied for premixed flame with pilot fuel to be used in gas turbine combustors. Premixed gas is passed through swirl vanes and burnt with the centrally injected pilot fuel. The dependencies of pressure, fuel to air ratio, premixed fuel rate, inlet velo...

Full description

Saved in:
Bibliographic Details
Published inJournal of Thermal Science and Technology Vol. 4; no. 1; pp. 74 - 85
Main Authors OHTSUKA, Masaya, YOSHIDA, Shohei, HIRATA, Yoshitaka, KOBAYASHI, Nariyoshi
Format Journal Article
LanguageEnglish
Published Tokyo The Japan Society of Mechanical Engineers and The Heat Transfer Society of Japan 01.01.2009
Japan Science and Technology Agency
The Japan Society of Mechanical Engineers
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:Acoustically-coupled combustion oscillation is studied for premixed flame with pilot fuel to be used in gas turbine combustors. Premixed gas is passed through swirl vanes and burnt with the centrally injected pilot fuel. The dependencies of pressure, fuel to air ratio, premixed fuel rate, inlet velocity and air temperature on the combustion oscillation are investigated. Two kinds of oscillation modes of ∼100Hz and ∼350Hz are activated according to inlet velocities. Fluctuating pressures are amplified when the premixed fuel rate is over ∼80% at elevated pressures. The fluctuating pressure peak moves to a higher premixed fuel ratio region with increased pressure or fuel to air ratio for the Helmholz type mode. Combustion oscillation occurs when the pilot fuel velocity is changed proportionally with the flame length.
ISSN:1880-5566
1880-5566
DOI:10.1299/jtst.4.74