Table of Contents
What is gas turbine IGV?
Inlet Guide Vanes (IGVs) deliver air to the inlet of a gas turbine’s axial compressor. While maintaining proper fuel-to-air ratio through various load ranges, they minimize the potential for unwanted emissions.
What is gas turbine simple explanation?
A gas turbine is a combustion engine at the heart of a power plant that can convert natural gas or other liquid fuels to mechanical energy. This energy then drives a generator that produces the electrical energy that moves along power lines to homes and businesses.
What are the four stages of a gas turbine engine?
How Does A Turbojet Work?
- Step 1: Air Intake. The air intake is essentially a tube in front of the engine.
- Step 2: Compressor.
- Step 3: Combustion Chamber.
- Step 4: Turbine.
- Step 5: Exhaust (aka “I’m outta here!”)
What can cause vibration in a gas turbine?
Most of the time, the problem of vibrations occurs in the generator’s rotor due to imbalance, shaft crack, bent shaft, looseness, misalignment and other malfunctions. These factors lead to increase the vibration in the gas turbine; this is because of wrong installation of the generator’s rotor.
Why IGV is used?
Variable inlet guide vane (IGV) is used to control the mass flow and generate prewhirl in centrifugal compressors. In centrifugal compressors, IGV is used to control the mass flow rate with negligible change in compressor ratio and shaft speed [2] .
What is inlet guide vane?
Inlet Guide Vanes (IGVs) and Inlet Butterfly Valves (IBVs) perform an important task—to regulate the airflow and pressure that enters a centrifugal compressor’s first stage of compression. Historically, IBVs had been the industry standard for centrifugal compressors.
What is gas turbine cycle?
In an ideal gas turbine, gases undergo four thermodynamic processes: an isentropic compression, an isobaric (constant pressure) combustion, an isentropic expansion and heat rejection. Together, these make up the Brayton cycle.
What are the 8 main causes of turbine vibration?
TOP 22 REASON’S BEHIND STEAM TURBINE VIBRATION IN POWER PLANT
- Unbalance of the steam turbine rotor.
- Unbalanced of steam turbine rotor parts.
- Loss parts of steam turbine cylinders.
- Deposited on steam turbine blades.
- Damage of journal bearings.
- Rotor shaft axial shift.
- Differential expansion.
What is guide vane?
Guide Vanes are fixed grooves found in turbines that help direct water, gas, or air around bends at maximum efficiency. As Impellers increase or decrease the flow of a substance through a system, Guide Vanes ensure that the substance is passed evenly and as smoothly as possible.
What is the definition of a pressure pulsation?
Pressure Pulsation. Pressure pulsations are the oscillations of the discharge pressure, occurring nominally during steady operating conditions, at a frequency equal to or higher than the pump drive shaft speed. From: Commercial Aircraft Hydraulic Systems, 2016.
How are the pressure ratios of a gas turbine determined?
The remaining high-pressure gases are accelerated through a nozzle to provide a jet to propel an aircraft. The smaller the engine, the higher the rotation rate of the shaft must be to attain the required blade tip speed. Blade-tip speed determines the maximum pressure ratios that can be obtained by the turbine and the compressor.
What happens when heat is added to a gas turbine?
Heat is added in the combustion chamber and the specific volume of the gas increases, accompanied by a slight loss in pressure. During expansion through the stator and rotor passages in the turbine, irreversible energy transformation once again occurs. Fresh air is taken in, in place of the heat rejection.
Can a gas turbine be an external combustion engine?
Most gas turbines are internal combustion engines but it is also possible to manufacture an external combustion gas turbine which is, effectively, a turbine version of a hot air engine. Those systems are usually indicated as EFGT (Externally Fired Gas Turbine) or IFGT (Indirectly Fired Gas Turbine).