TS-64 CFD Predictions of Low NO_x Lean Gas Turbine Radial Swirler Primary Zones(Session C-5 Combustor CFD)

スポンサーリンク

概要

• 論文の詳細を見る

• A counter-rotating radial swirler, similar to that used in the head of the RR RB211 industrial gas turbine, has been investigated experimentally and using CFD. It was found that upstream vane passage fuel injection achieved low NO_x emissions and that it was not necessary to fuel both passages. However, if the fuel injection was made at the swirler outlet wall then the NO_x emissions increased significantly. This did not occur when single swirlers were used and this fuel injection location is particularly suitable for liquid fuel, as it cannot result in flashback or autoignition inside the swirler. Consequently, the flame structure of the counter-rotating radial swirler with outlet wall fuel injection was determined experimentally and using CFD. The flame was traversed for gas composition at a mean equivalence ratio of 0.52 and 600K. The CFD predictions started from the upstream plenum chamber and computed the aerodynamics inside the vane passages and the outlet duct as well as the downstream dumpflow expansion region. The results showed that the reason for the higher NO_x emissions was that fuel was swept into the corner dump expansion recirculation zone. This created a locally richer mixture with higher temperatures and NO_x generation. The CFD results correctly predicted this local rich zone, but predicted it to be richer and hotter than reality and this resulted in an overprediction of the NO_x emissions.

• 公益社団法人日本ガスタービン学会の論文
• 1999-11-14

著者

• Andrews G.e.

  The Department Of Fuel And Energy The University Of Leeds

• KIM M.N.

  The Department of Fuel and Energy The University of Leeds

• Escott N.h.

  The Department Of Fuel And Energy The University Of Leeds

• POURKASHANIAN M.

  The Department of Fuel and Energy The University of Leeds

関連論文

• TS-51 Impingement/Effusion Cooling : Influence of the Number of Holes on the Cooling Effectiveness for an Impingement X/D of 10.5 and Effusion X/D of 7.0(Session C-2 Heat Transfer 2)
• TS-72 Ultra Low NO_x Gas Turbine Combustion(Session C-7 NO_x Reduction 2)
• TS-74 Flame Structure of Very Lean Low NO_x Radial Swirl Stabilised High Intensity Combustion(Session C-8 NO_x Reduction 3)
• TS-64 CFD Predictions of Low NO_x Lean Gas Turbine Radial Swirler Primary Zones(Session C-5 Combustor CFD)

スポンサーリンク