Mitigation of combustion instabilities

Dr. Dan Michaels | Aerospace Engineering


Sustainability and Energy

The Technology

During turbine burning cells operation there is instability at the area around the nozzle injecting fuel + gases. Working conditions (fuel / gas %, flow etc.) are set per specific cell geometry and fuel material. If needed changes in the cell geometry or actuation of the injection (adding ~15% of flow) can be done.

Using diluent gas injection at low flow rates at the dump plane is used to suppress combustion instabilities.


  • Avoiding pressure instability, heat flux and release which may cause structural damage and shorten combustion cell life
  • Safety
  • Allows usage of variety of fuels in the same combustion cell

Applications and Opportunities

  • Gas turbines
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