#8 Starting System ( Gas turbine) скачать в хорошем качестве

#8 Starting System ( Gas turbine)

Starting System in a Gas Turbine The starting system is a critical component of a gas turbine engine, responsible for initiating the rotation of the turbine rotor. This allows the engine to accelerate to operating speed and generate power. Types of Starting Systems: Electric Starting: This is the most common method, using a powerful electric motor to turn the turbine rotor. The motor is powered by a battery or external power source. Pneumatic Starting: In this method, compressed air is used to turn the turbine rotor. The air is supplied from an external source or stored on board the engine. Hydraulic Starting: This method uses hydraulic pressure to drive a starter motor, which in turn rotates the turbine rotor. Gas Turbine Starter: Some larger gas turbines can use a smaller gas turbine to start the main turbine. Key Components of a Starting System: Starter Motor: The electric motor or other device that provides the initial rotational force. Starter Gearbox: A gearbox that reduces the speed of the starter motor to match the turbine rotor's rotational speed. Starter Clutch: A mechanism that engages the starter motor with the turbine rotor and disengages once the engine is running. Battery or Power Source: The source of electrical or pneumatic power for the starter system. Control System: The system that manages the starting process, including sequencing and safety interlocks. Starting Procedure: Power Supply: The battery or external power source is activated. Starter Engagement: The starter motor is engaged with the turbine rotor. Rotation: The starter motor begins to rotate the turbine rotor. Ignition: Once the turbine rotor reaches a certain speed, the fuel injection system is activated and the fuel-air mixture is ignited. Self-Sustained Rotation: The combustion process generates enough power to sustain the turbine rotor's rotation, and the starter motor can be disengaged. Challenges in Starting System Design: Reliability: The starting system must be highly reliable to ensure that the engine can be started consistently. Efficiency: The system should be efficient in terms of power consumption and starting time. Safety: The starting system must include safety features to prevent accidents and damage. Environmental Considerations: In some applications, the noise and emissions generated during the starting process may need to be considered.