Novel unsteady temperature/ heat transfer instrumentation and measurements in the presence of combustor instabilities

Published By SIEMENS

• By K S Chana, K J Syed, M I Wedlock, R W Copplestone, M S Cook and G Bulat
• Published June 2005
• 8 Page(s)

Lower NOx emission from gas turbine combustion systems can be achieved through reducing the equivalence ratio of the main reaction zone and/or increasing the burner pressure drop. This strategy however takes pressure drop and/or air away from the combustor cooling, thereby compromising the combustor life. In order to achieve an optimum design that is a good compromise between low emissions and long component life, accurate heat transfer prediction is essential. This paper reports on combustion tests conducted at gas turbine operating conditions, where pressure dynamics have been controlled by altering combustor operating conditions and through the use of a siren placed in the upstream air flow.