Generic Modeling of Turbomachinery Components and Systems


What are Turbomachines?

Turbomachines are devices that convert the total energy of a working medium into mechanical energy and vice versa. The first category in turbomachinery is primarily used to generate power. It includes, for example, steam turbines, gas turbines, and hydraulic turbines.

The second category’s primary function is to increase the total pressure by consuming power, and the working fluid consists of compressors, pumps, and fans. The electric vehicle simulation software can help learn about EVs. 

Generic Modeling of Turbomachinery Components and Systems

A turbomachinery system, such as a power generation gas turbine engine, a thrust generation aero-engine, rocket propulsion, or a small turbocharger, comprises several subsystems referred to as components.

Within the system, an autonomous entity with a defined function. Inlet and exit nozzles

Among the components are diffusers, combustion chambers, compressors, and turbines.

Examples. A component can have multiple sub-components. A turbine or a generator

A sub-component like this can be found in the compressor stage. The mathematical models of

Components are referred to as modules.

The gas turbine engine comprises an inlet nozzle, a multistage compressor, cooling air extraction, and bypass systems. The cooling air extraction system provides cooling mass flow to the shaft, high-pressure turbine, and other features.

The mixing air is used to lower the combustion chamber’s exit temperature. The workaround

The system prevents the compressor from entering a rotating stall and surging during startup and shutdown procedures to lower the compressor exit.

The remaining compressor mass flow passes through the flow velocity and thus the kinetic energy before entering the combustion chamber through a diffuser.

Fuel is added to the combustion chamber component to achieve turbine intolerance.

The compressor and generator are powered by the multistage turbine component mounted on the same shaft as the compressor. A spool is the arrangement of the compressor and turbine components on the same shaft.


It comprises a high-pressure spool, also known as a gas generator. It includes the multistage high-pressure compressor (HP-compressor), combustion chamber and high-pressure turbine (HP-turbine), and low-pressure turbine components. The pressure-spool shaft connects the low-pressure compressor to the low-pressure reservoir, the combustion chamber, an inlet diffuser, and an exit nozzle.

Aerodynamically, the two spools are linked. The mass flow has high kinetic energy.

The energy exiting the last stage of the HP-turbine stage strikes the first stator and is further expanded within the LP component and the LP-turbine

following thrust nozzle, which supplies the necessary kinetic energy for thrust


Several other components, such as pipes that transport mass flow from one location to another, compressor to the turbine for cooling, valves with defined operation tegs, electric motors for power supply, etc.

Turbomachinery in Green Energy Systems

The key phrase in this definition of turbomachinery is “energy transfer.” Green energy systems necessitate various types of energy transfer, including heat transfer via a heat exchanger, but more commonly involve energy transfer to or from fluid via a rotating motion.

This energy transfer is required for various reasons, which can be divided into two categories:

1. Increasing the energy of the fluid to pressurize the fluid for energy storage or processing

2. Moving or circulating the fluid from one location to another.

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