Combustor heat shield with carbon avoidance feature

摘要

The build-up of carbon deposition on the front face of a combustor heat shield (36) is discouraged by jetting air out from the front face of the heat shield (36) with sufficient momentum to push approaching fuel droplets or rich fuel-air mixture way from the heat shield (36). The heat shield (36) is provided with carbon purge jet holes (62) in alignment with an impingement hole (60) in the combustor shell (20).