ISA - International Standard Atmosphere is defined as 101.325 kPa and 15 degrees Celsius. Make necessary assumptions on missing parameters where necessary.
The compressor in a single-spool gas turbine has a pressure ratio of 15 and an isentropic efficiency of 85%. The pressure drop is 2% of the compressor delivery pressure. The turbine-inlet temperature and isentropic efficiency are 1100 K and 90%. Gases leave the turbine at a pressure of 110 kPa.
1. Calculate:
a) Fuel-to-air ratio
b) Specific power
c) SFC (Specific Fuel Consumption)
d) Thermal efficiency
2. If all the gas turbine components are assumed to be ideal, there is no pressure drop in the combustion chamber, and the gases leave the turbine at ambient conditions, what will be the ideal efficiency?