What is guide vane in turbine?
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 inlet guide vane?
Inlet guide vanes may be either fixed or variable. They are usually located ahead of each impeller eye (Fig. 8.31) and are designed to guide the flow of gas efficiently into the eye of the impeller. Most process compressors use fixed since most vanes usually corrode/foul and jam.
What is the purpose of the inlet guide vanes and straightening vanes inside a turbine engine?
The engine inlet of a turbine engine is designed to provide a relatively distortion-free flow of air, in the required quantity, to the inlet of the compressor. [Figure 1] Many engines use inlet guide vanes (IGV) to help straighten the airflow and direct it into the first stages of the compressor.
What is the function of the turbine inlet guide vane assembly?
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.
What is the purpose of guide vanes?
Guide or Stay vane: The basic purpose of the guide vanes or stay vanes is to convert a part of pressure energy of the fluid at its entrance to the kinetic energy and then to direct the fluid on to the runner blades at the angle appropriate to the design.
What do variable guide vanes do?
The variable guide vanes (VGV) of gas turbine engines are commonly utilized to expand operating range and to improve efficiency of the compressor. Guiding air flow using the VGVs in the compressor prevents aerodynamic instability by making proper incidence angle to the blades.
What is difference between IGV and damper?
Dampers ‘IGVs (Inlet Guide Vanes) are designed to pre-rotate or spin the air in the direction of fan/compressor rotation. The butterfly damper does not decrease the power consumption when throttled, in contrast to IGV.
What is the main difference between the variable inlet guide vanes & variable stator vanes?
Variable guide vanes (VGVs) are therefore generally utilized to obtain stability of the compressor over a wide operating range and the stator vanes of VGVs change their angles according to the inlet air-flow, which varies with the engine RPM [1,2].
What is the function of the turbine section used in a turbine engine?
The turbine (and exhaust) section. The turbine section of the gas turbine engine has the task of producing usable output shaft power to drive the propeller. In addition, it must also provide power to drive the compressor and all engine accessories.
What are the functions of guide vanes?
What is the purpose of variable inlet guide vanes?
Variable Inlet Guide Vanes (VIGVs) regulate airflow into the Low-Pressure Compressor (LPC) to enhance turbine efficiency at part loads.
Why are guide vanes important in propeller turbines?
Guide vanes direct the water tangentially to the turbine wheel, known as a runner. This radial flow acts on the runner’s vanes, causing the runner to spin. The guide vanes (or wicket gate) may be adjustable to allow efficient turbine operation for a range of water flow conditions.
Where are the turbine inlet nozzle vanes located?
The turbine inlet nozzle vanes are located directly aft of the combustion chambers and immediately forward of the turbine wheel. This is the highest or hottest temperature that comes in contact with metal components in the engine.
What is the difference between nozzle guide vanes and turbine discs?
The nozzle guide vanes are usually of hollow form and may be cooled by passing compressor delivery air through them to reduce the effects of high thermal stresses and gas loads. Turbine discs are usually manufactured from a machined forging with an integral shaft or with a flange onto which the shaft may be bolted.
What is a variable geometry guide vane turbo-machine?
Variable geometry guide vane turbo-machine design can provide higher pressure and flow with relatively higher speed and lower torque characteristics in contrast with conventional centrifugal pump designs. This feature makes the CVF system appropriate for use with relatively smaller electric motor drives.
What are inlet guide vanes in an air compressor?
Inlet guide vanes may be either fixed or variable. They are usually located ahead of each impeller eye (Fig. 8.31) and are designed to guide the flow of gas efficiently into the eye of the impeller. Most process compressors use fixed since most vanes usually corrode/foul and jam. Many air compressors use variable on the first stage. Fig. 8.31.