The great success of the gas turbine in the aircraft field has since long attracted many people serving a wide range of industries. The continued development towards increasing the turbine inlet temperature andimproving the component efficiencies over the past der,ade has enlarged the sprectrum of gas turbine applications to areas such as power generation, marine and automotive propulsion, nuclear plants, utility industry, etc. The main reason. of such a wide popularity being enjoyed by the gas turbine is its advantages of simplicity, high power/weight ratio, smooth running, less main- tenance, multi.fuel capability, suitability for combined cycles and high reliability. The application of the aircraft gas turbine into the industrial and power generation has given a new stimulus to this widening of application spectrum of the gas turbine because of the rich experince obtained in aircraft field. Turboshaft engines are now being used for generation of electricity, auxiliary power drives, marine vehicles and ordnance prime movers, pumping of fluids, etc. The whole gamut of the applications of the gas turbine can be divided into three broarl categories : 1. Industrial 2. Power generation 3. Prnpulsion.