Turbomachine configured to burn ash-bearing fuel oils and method of burning ash-bearing fuel oils in a turbomachine

A method of burning ash-bearing fuel oils in a turbomachine, the method comprising:

• combusting a heavy fuel to form an ash laden hot gas stream;
• guiding the ash laden hot gas stream toward a hot gas path of a turbine portion of the turbomachine;
• introducing a substantially ash free compressor air flow into the hot gas path;
• passing the substantially ash free compressor airflow and the ash laden hot gas stream across a plurality of first stage airfoil members;
• guiding the substantially ash free compressor air of each of the plurality of first stage airfoil members;
• forming an ash depleted air stream downstream of the trailing edge portion of each of the plurality of first stage nozzles;
• directing the ash depleted air stream toward an adjacent ones of a plurality of second stage airfoil members;
• and
• passing the ash depleted air stream across the corresponding adjacent ones of the plurality of second stage airfoil members.