Gas Turbine Handbook : Principles and Practices

Applications 15
LM5000, CF6/LM6000, Rolls Royce RB211, and Pratt & Whitney
JT8/FT8). These engines are commonly referred to as aero-derivatives.
Of these aero-derivative engines, the LM2500 (shown in Figure
2-4) has been the most commercially successful. However, not all land
based gas turbines were derived from aero engines, the majority of
them were derived from the steam turbine as discussed in Chapter
1. Like the steam turbines, these gas turbines have large, heavy,
horizontally split cases (hence the designation “ heavy industrial gas
turbine”) and operate at lower speeds and higher mass flows than the
aero-derivatives (at equivalent horsepower). A number of hybrid gas
turbines in the small and intermediate size horsepower range have
been developed to incorporate features of the aero-derivative and the
heavy industrial gas turbines. The heavy industrial and the hybrid
industrial gas turbines will be addressed in the next section.
MECHANICAL DRIVE
Mechanical drive gas turbines include the steam turbine derived
heavy industrial gas turbines, aero-derivative gas turbines, and the
hybrid industrial gas turbines. These turbines are listed in Appendix
Figure 2-4. Courtesy of General Electric Company. The LM2500
stationary gas turbine was derived from the CF6 “high bypass ratio”
flight engine that powered the C5A, the largest military cargo
aircraft built in the USA. The LM2500 is ISO base load rated at 23
megawatts. This cross section of the LM2500 includes the six stage
power turbine. This power turbine was derived from the six stage
fan-turbine used in a CF6 flight engine.