CMPASS Model
The CMAPSS dynamics model is a highly sensitive computer model for simulating realistic large commercial turbofan engines. It contains some editable input parameters that allow the user to select specific values for the operating curve, closed loop (with engine and its control system) controller, environmental conditions, etc. CMAPSS models a 90,000-pound thrust class engine capable of operating at (i) altitudes from sea level to 40,000 feet, (ii) Mach numbers from 0 to 0.90, and (iii) sea level from -60 to 103°F temperature to fly. It includes a transient aerothermodynamic model and an engine controller that allows the engine to operate at various thrust levels throughout the range of flight conditions. The figure below shows the schematic diagram of the engine, and the corresponding station number specified in the CMAPSS model file.
As can be seen from the figure above, the engine has 5 rotating sub-components, from left to right are the fan, low-pressure compressor, high-pressure compressor, combustion chamber, high-pressure turbine, and low-pressure turbine