Table of Contents
- 1 What is the purpose of guide vanes?
- 2 What is the function of guide vanes in a Francis turbine?
- 3 What do variable guide vanes do?
- 4 Why are guide vanes important in propeller turbines?
- 5 What is inlet guide vane?
- 6 Which turbine have adjustable guide vanes?
- 7 Do guide vanes rotate?
- 8 What is vane angle?
- 9 What are guide vanes in wind turbines?
- 10 How do I upgrade a turbine with variable inlet guide vanes (figv)?
- 11 How are LVDTs and VIGV positions controlled in a turbine?
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 is the function of guide vanes in a Francis turbine?
Guide and stay vanes: The primary function of the guide and stay vanes is to convert the pressure energy of the fluid into kinetic energy. It also serves to direct the flow at design angles to the runner blades. Runner blades: Runner blades are the heart of any turbine.
Which type of vanes is used in turbine motors?
Each slot of the rotor is fitted with a freely sliding rectangular vane. The vanes are extended to the housing walls using springs, cam action, or air pressure, depending on the motor 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.
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.
Which turbine has adjustable guide vanes?
Kaplan turbine
Kaplan turbine is a low head axial flow turbine. In a Kaplan turbine, the velocity of flow through the rotor is constant along the radius. Kaplan turbine is a propeller turbine in which the vanes fixed on the hub are adjustable.
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.
Which turbine have adjustable guide vanes?
Kaplan turbines
There are variants of Kaplan turbines that only have adjustable inlet guide-vanes or adjustable rotor blades, which are known as semi-Kaplan’s.
What is nozzle guide vanes?
Nozzle guide vanes (NGVs) are static components mounted into the casings of gas turbine engines as e.g. aircraft turbines. Typically, nozzle guide vanes are designed to convert part of the gas flow’s heat and pressure energy into a tailored kinetic energy from which rotor blades can generate power.
Do guide vanes rotate?
The remaining nozzle guide vanes are, in effect, turbine blades attached to a rotating casing, which revolves in the opposite direction to a rotating drum.
What is vane angle?
The vane angle βs determines the fluid flow direction in an impeller (also see Vane, Vane cascade). On centrifugal pumps it is defined as the angle between the chord c and the circumferential direction u (see Vane cascade).
What is inlet guide vanes?
What are guide vanes in wind turbines?
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.
How do I upgrade a turbine with variable inlet guide vanes (figv)?
If the turbine has Fixed Inlet Guide Vanes (FIGV), the upgrade involves adding the VIGV module, a new Hydraulic Control Unit (if applicable), off-engine cables, hydraulic lines, and updating the control software. Contact us for a quote on our variable inlet guide vanes with EFS.
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.
How are LVDTs and VIGV positions controlled in a turbine?
LVDTs and VIGV positions are controlled by continuous measurement of LPC inlet temperature and HPC discharge static pressure. If turbine has Fixed Inlet Guide Vanes, the upgrade involves adding VIGVs, Hydraulic Control Unit (HCU) (if applicable), off-engine cables, hydraulic lines and updating the software.