DNS of a Simplified Gas Turbine Premixer: Auto-Ignition and Flame Stabilization
Conference
·
OSTI ID:1972319
With the increasing need for fuel-flexibility, an understanding of auto-ignition inside gas turbine premixers is crucial. Direct numerical simulation (DNS) is a great tool to reveal the fine grain details of physics inside the premixer and guide the choice of the models to use for less expensive simulations. We present numerical simulations of a simplified and downscaled premixer, with multiple air jets in rich fuel crossflow. The simulations show intense fuel-air mixing and flame-turbulence interaction. We examine flow acceleration by the incoming jets, and the combustion within the device. We observe low-temperature and high-temperature combustion signatures, and compute the flame index to quantify local stabilization modes.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1972319
- Report Number(s):
- NREL/PO-2C00-85712; MainId:86485; UUID:a3245677-e2c6-4db0-b9fb-498592035737; MainAdminID:69114
- Country of Publication:
- United States
- Language:
- English
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