Table of Contents
What is variable stator vanes?
The variable stator vanes are rotatable about an axis so as to direct the airflow through the compressor. The variable stator vanes thus may control the quantity of air flowing through the compressor so as to facilitate optimized performance. The size and configuration of the variable stator vanes may vary.
What is the purpose of a stator vane?
Stator vanes are stationary componentry that serve to convert this rotational energy into static pressure through the change in flow, playing a vital role in the operation and efficiency of the entire asset.
What is the purpose of variable inlet or stator guide vanes?
Variable Inlet Guide Vanes, with EFS Variable Inlet Guide Vanes (VIGVs) regulate airflow into the Low-Pressure Compressor (LPC) to enhance turbine efficiency at part loads.
What is the function of the stator in a gas turbine compressor?
The job of the stators is to keep the flow from spiraling around the axis by bringing the flow back parallel to the axis. Depending on the engine type, there may be multiple turbine stages present in the engine.
What is the function of IGV in gas turbine?
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 variable inlet guide vanes?
A gas turbine engine in which the angle of the inlet guide vanes can be changed to meet the requirements of the engine-operating conditions. These are normally in front of the first stage of an axial compressor and sometimes in the subsequent stages as well.
What is the function of the variable stator vane VSV actuator?
The engine control variable stator vane actuator controls the position of the compressor stator vanes. The engine control variable stator vane actuator is a linear actuator, with an integral two-stage, four-way electrohydraulic servo valve for control and position sensing for engine control feedback.
What is variable inlet guide vane?
What are guide vanes?
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 function of the stator vanes in an axial compressor?
The function of the stator vanes is to receive air from the air inlet duct or from each preceding stage and increase the pressure of the air and deliver it to the next stage at the correct velocity and pressure.
What is the purpose of the stator vanes in the compressor section of a turbine engine?
In the turbine, the stator vanes increase gas velocity, and then the rotor blades extract energy. The vanes and blades are airfoils that provide for a smooth flow of the gases. As the airstream enters the turbine section from the combustion section, it is accelerated through the first stage stator vanes.
How does a variable stator vane control system work?
The variable stator vane control system may include a variable stator vane positioned by an actuator and a trimmer motor, a resolver to determine a position of the variable stator vane, and a controller in communication with the resolver, the actuator, and the trimmer motor to prevent over travel of the variable stator vane.
How does the stator-vane angle affect the performance of a compressor?
The angle is controlled by the fuel-control unit. Varying the stator-vane angle ensures that the air directed to the first stage of the compressor meets the compressor at an optimum angle and thus minimizes the possibility of a compressor stall.
How do you turn the engine vanes?
A typical way this is done is to fit gear wheels on the outer ends of the vane pivots, and place a single large toothed wheel around the whole engine so that when the large wheel turns, all the vanes in that position turn with it. Thanks for contributing an answer to Aviation Stack Exchange!
What are the advantages of a variable geometry gas turbine?
The VSVs protect the compressor from surging hence improve the stabiltity of operation. In addition, if you compare a variable geometry gas turbine with a fixed geometry gas turbine, the one with VSVs can reach a higher/lower power setting faster than the fixed gometry one.