Alstom Power N.v.

Martin Paul Brown

Robin Thomas David McMillan

Sarah Gillian Dawson

A gas-fuelled burner, especially for gas turbines powered by low calorific value fuel, is provided with restrictors to slow the incoming fuel from inlets to a similar mass mean velocity as the air provided through inlets, thereby reducing turbulence and improving combustion. The restrictors and outlet passages carrying the fuel to the combustion pre-chamber are located in vanes of a radial inlet swirler so as to alternate with the air inlets. The geometry is such that the respective flows emerge tangentially to a notional circle centered on the combustion pre-chamber of the turbine. The circle is preferably between 0.7 and 1.0 times the diameter of the actual pre-chamber. The ratio of the area of the restrictor to that of the outlet passage may lie between 1:1.1 and 1:1.7, preferably 1:1.4.

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West Des Moines, IA, United States of America

Martin Paul Brown