The effect of combustion dynamic pressure oscillations on the structural integrity of the MS 7001F dry low NOx2 (DLN 2) combustion system has been evaluated using ANSYS [1] finite element analyses and high cycle fatigue material data. Analytical results were validated with laboratory measurements on the combustion system subjected to combustion dynamic pressure at actual gas turbine temperature and pressure operating conditions. The combustion liner, transition piece, impingement sleeve, and supports were proven to have excellent durability when subjected to dynamic loads. No risk of structural failure exists at anticipated dynamic pressures using assumptions shown to be conservative.

Issue Section:
Gas Turbines: Structures and Dynamics
Topics:
Combustion systems, Gas turbines, Pressure, Combustion, Durability, Finite element analysis, High cycle fatigue, Nitrogen oxides, Oscillations, Risk, Stress, Structural failures, Temperature
1.
ANSYS User’s Manuals for Revision 5.0 Vols. I through IV, Swanson Analysis Systems, Inc., Houston, PA, 1992.
2.
Bagepalli, B., Barnes, J., Dinc, S., Imam, I., and Slocum, G., 1992, “A System Dynamics Approach to Modeling Gas Turbine Combustor Wear,” ASME Paper No. 92-GT-47.
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 by The American Society of Mechanical Engineers
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