Table of Contents
- 1 What is the purpose of a compressor of a gas turbine?
- 2 Which compressor is preferred for open cycle gas turbine?
- 3 Is a turbine a compressor?
- 4 Which of the following is are the limitations of gas turbine?
- 5 What is the compression ratio of a GE gas turbine?
- 6 What is the difference between steam and axial compressors?
- 7 Why do GT compressors have tip-clearance issues?
What is the purpose of a compressor of a gas turbine?
There are several different types of gas turbine engines, but all turbine engines have some parts in common. All turbine engines have a compressor to increase the pressure of the incoming air before it enters the combustor. Compressor performance has a large influence on total engine performance.
Which compressor is preferred for open cycle gas turbine?
This is achieved by splitting the compression unit into two sections: the low pressure compressor (LPC) and the high pressure compressor (HPC)….High Efficiency Gas Turbines.
| Manufacturer | Mitsubishi |
|---|---|
| Model | M501J |
| Simple Cycle Efficiency | 41 |
| Combined Cycle Efficiency | 61.5 |
| Power Produced (simple) (MW) | 327 |
Does the turbine drive the compressor?
As hot combustion gas expands through the turbine, it spins the rotating blades. The rotating blades perform a dual function: they drive the compressor to draw more pressurized air into the combustion section, and they spin a generator to produce electricity.
Is a turbine a compressor?
Turbine is the device in which fluid expands. Compressor is the device which is used to compress the fluid and increase its pressure.
Which of the following is are the limitations of gas turbine?
Explanation: The limitations in the functioning of a Gas Turbines are inability of self-starting, excess rotor speeds and inability to adjust to varying loads.
When should a compressor be started?
ANSWER: Before starting the gas turbine.
What is the compression ratio of a GE gas turbine?
Today, GE’s most advanced F-class gas turbine, the 7FA.05 gas turbine (231 MW), has a 14-stage compressor with an overall pressure ratio of 18.4:1. This represents a reduction of one stage and an almost five-fold increase in compression ratio in seven decades of compressor design progress.
What is the difference between steam and axial compressors?
Contrast that to a steam plant where only about 1\% of the turbine output is used to power feedwater pumps to resupply incompressible water to the boiler. Axial compressors get their name because gas-path air flows in more or less a straight line in an axial direction, parallel to the gas turbine’s axis of rotation.
What is the gas path in an axial compressor?
The gas path in a typical single-spool six-stage axial compressor is shown in Fig 1. Air enters IGVs (inlet guide vanes, which are not present on all gas turbines) and passes through each of the stages, on its way to the combustor section.
Why do GT compressors have tip-clearance issues?
Given that the average gas-path velocity in an axial direction is relatively constant for a GT compressor, as pressure and air density increase in the direction of flow the blades and stators become shorter. Tip-clearance issues can occur in high-pressure stages because the allowable clearances are more significant for shorter airfoils.