Category: Gas Turbines

1 Efficiency The Brayton cycle is shown on p-V and T-s diagrams in Fig. 16.4. During this cycle, air is drawn into the compressor at point 1 and then compressed isentropically along the process 1-2. Process 2-3 represents the burning of the oil at constant pressure p2. Process 3-4 is the isentropic expansion of the gases through the turbine. Process 4-1…

Constant pressure gas turbines are now used for generating electricity, driving locomotives and aeroplane propellers, producing the air stream for wind tunnels, and jet propulsion of air craft. In some types of aircraft, the exhaust gases from the main engines are used for driving a gas turbine which, in turn, drives the supercharger. Gas turbines…

The comparison of open and closed cycles gas turbines is given in Table 16.1.   Table 16.1 Comparison of open and closed cycles gas turbines

Gas turbines may be classified as follows: 1 Constant Pressure Combustion Gas Turbine In this type, the fuel is burned at constant pressure and the cycle used is the Joule cycle. The turbine belongs to the reaction type using oil fuel and is fitted with an axial flow rotary air compressor which is coupled to…

1 Advantages 2 Disadvantages

The limitations of gas turbines are as follows:

The following are the major fields of application of gas turbines:

The gas turbine is the most satisfactory way of producing very large power in a self-contained and compact unit. The gas turbine obtains its power by utilising the energy of a jet or burnt gases and air, the velocity of the jet being absorbed as it flows over several rings of moving blades which are…