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Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines - Discussion

Discussion Forum : Compressors, Gas Dynamics and Gas Turbines - Section 1 (Q.No. 37)
Compressors, Gas Dynamics and Gas Turbines
37.
The compression ratio in a gas turbine is
4
1
9
12
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
29 comments Page 1 of 3.
Ashish Patel said:   6 years ago
18:1.

Industrial gas turbines are designed for stationary applications and have lower pressure ratios " typically up to 18:1. Aeroderivative gas turbines are lighter weight compact engines adapted from aircraft jet engine design which operate at higher compression ratios " up to 30:1.
Islam gamal said:   7 years ago
I think it means that the compression ratio between the inlet of the whole machine and outlet so what the compressor compresses the turbine expand so the right answer will be 1.
Imad said:   6 years ago
@All.

There is a difference between pressure ratio, and compression ratio.

Compression ratio in Gas Turbine is 1.
Pressure ratio in Gas Turbine is started from 7 bars.
Rami said:   7 years ago
The inlet to the compressor and the outlet from the turbine ideally should have the same pressure.
ASHISH said:   10 years ago
If the compression ratio is 1 then how does it reduces the pressure of the air before delivering?
Ashok said:   8 years ago
If pressure ratio is 1 what is the purpose of using a compressor.
Vinay agarwal said:   7 years ago
It's 10 to 15 in a gas turbine.

So, 12 is correct guys.
Kacha said:   9 years ago
It's 12. Designed pressure ratio of frame 9E.
GOPAL DEY said:   7 years ago
The Compression Ratio for Gas turbine is 7.
Nayan Gogoi said:   8 years ago
It should be 7, right? Then why here it is?
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