Patent ID: 8511086

Claim:
A system for reducing combustion dynamics in a combustor, comprising: a. an end cap that extends radially across at least a portion of the combustor, wherein the end cap comprises an upstream surface axially separated from a downstream surface; b. a plurality of premixing tube bundles that extends from the upstream surface through the downstream surface of the end cap, wherein each premixing tube bundle provides fluid communication through the end cap for providing fuel and air to the combustor; c. a diluent supply source in fluid communication with the end cap, wherein the diluent supply source provides diluent flow to the end cap; and d. a plurality of first diluent distributors circumferentially arranged inside at least one tube bundle, wherein each first diluent distributor extends downstream from the downstream surface and provides fluid communication for the diluent flow through the downstream surface of the end cap.