Patent ID: 11898489
Assignee: ROLLS-ROYCE PLC
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 15:
16. The gas turbine engine according to claim 15, wherein a first turbine entrance temperature is defined as an average temperature of airflow at the entrance to the first turbine at cruise conditions and a first turbine exit temperature is defined as an average temperature of airflow at the exit from the first turbine at cruise conditions, and wherein a first turbine temperature change defined as:, the
   ⁢
      
   first
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   turbine
   ⁢
      
   entrance
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   temperature
  
  
   the
   ⁢
      
   first
   ⁢
      
   turbine
   ⁢
      
   exit
   ⁢
      
   temperature, is in the range from 1.6 to 1.85.