HYSYDAYS
1st World Congress of Young Scientists on Hydrogen Energy Systems
1st World Congress of Young Scientists on Hydrogen Energy Systems
ISBN Print: 1-56700-230-7
HYDROGEN AS A PILOT AND MAIN FUEL IN GAS TURBINES FOR STATIONARY AND TRANSPORT INCLUDING AERO APPLICATIONS.
DOI: 10.1615/HYSYDAYS2005.410
pages 273-276
Abstract
A radial swirler burner design which incorporated a
hydrogen pilot with lean staging is compared with dual stage
natural gas pilot design in gas turbine (GT) conditions. All of
the combustion air was admitted into the combustor with the
effect that mixing took place in the axial burner primarily for
low NOx production in lean conditions. The fuel was passage
injected in the jets inside the counter rotating design made in
Leeds for Rolls Royce which also incorporates a pilot central
injector. A wall injector just downstream of the radial swirler
exit was also used to provide an alternative pilot source. The
thrust of the investigation is on a dual fuel consisting of natural
gas (NG) as the main fuel and hydrogen (H2) as the pilot in a
similar design to that used by aero industries in low NOx aero
gas turbines (GTs) The NOx disadvantage of the H2 caused by
higher combustion temperature is examined within the lean
burn ability of the fuel to reduce emissions. The possibility to
increase the turndown ratio and lower the weak extinction
through injector position, fuel staging and air staging geometry
is assessed and in order to improve and optimise the burner
design for dual fuel and utilise the higher turbulence
characteristic contribution for better mixing, premixing and
preheating by H2 is investigated.