text: efficiently the high. pressure ratios necessary 
  for 
  the axial 
  fuel consumption. Also, 
  compressor is capable of providing high air- 
  flow with a minimum of compressor diameter. 
  When compared with 
  the centrifugal com- 
  pressor, the design and construction of the 
  axial compressor is relatively complex and 
  costly and the high efficiency is sustained over 
  a much narrower range of operating conditions. 
  For these reasons, the axial compressor finds 
  greatest application where rhe demands of 
  efficiency and output predominate over con- 
  siderations. of cost, simplicity, 
  flexibility of 
  operation, etc. Multispool compressors and 
  variable statot blades serve to improve the 
  operating characteristics of 
  the axial com- 
  pressor and increase the flexibility of operation. 
  The combustion chamber must convert the fuel 
  chemical energy into heat energy and cause a 
  large increase in the total energy of the engine 
  airflow. The combustion chamber will opet- 
  ate with one principal 
  the dis- 
  charge from the combustion chamber must be 
  at temperatures which can be tolerated by the 
  turbine section. The combustion of liquid 
  hydrocarbon fuels can produce gas temperatures 
  which are in excess of 1,700 to 1,800° C. 
  the maximum continuous turbine 
  However, 
  blade operating 
  temperatures rarely exceed 
  NO0 to J,OOO” C and considerable excess air 
  must be used in the combustion chamber to 
  prevent exceeding these temperature limits. 