Table of Contents
What do variable inlet guide vanes do?
Variable Inlet Guide Vanes (VIGVs) regulate airflow into the Low-Pressure Compressor (LPC) to enhance turbine efficiency at part loads.
What is variable guide vanes?
Abstract. 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 turbine inlet guide vanes?
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 nozzle guide vane?
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.
What is IGV in chiller?
Abstract. Variable inlet guide vane (IGV) is used to control the mass flow and generate prewhirl in centrifugal compressors. The efficient operation of IGV is limited to the range of aerodynamic characteristics of their vane profiles.
What is the function of guide?
Tour guides lead visitors through tourist attractions and give information about the attractions’ natural and cultural significance. Often, they also act as interpreters for travelers who do not speak the local language. Automated systems like audio tours are sometimes substituted for human tour guides.
What is the variable inlet guide vane upgrade?
What is the Variable Inlet Guide Vane upgrade? Variable Inlet Air Vanes help guide inlet airflow to enhance engine performance. Assembly located in front of Low Pressure Compressor (LPC), consisting of 43 stationary leading-edge vanes and variable trailing flaps (rotate -10 to +60 degrees).
What is variable inlet air vanes (via)?
Variable Inlet Air Vanes help guide inlet airflow to enhance engine performance. Assembly located in front of Low Pressure Compressor (LPC), consisting of 43 stationary leading-edge vanes and variable trailing flaps (rotate -10 to +60 degrees). Variable Differential Transformers (LVDTs) on actuator ring drivetwin hydraulic actuators.
How do inlet guide vanes affect the impeller curve?
The effect of inlet guide vanes is shown in Fig. 8.33. For example, guide vanes that add “preswirl” counter to the impeller rotation will increase head and reduce the slope of the curve while guide vanes adding “preswirl” with the impeller rotation will decrease head and increase the slope of the curve. Fig. 8.32.
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.