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Is there a relationship between no of rows of VSV and the engine RPM? For example, gas turbine MS-5001 has 5089 rpm with only one row of IGV while PGT-10/2 has 10000 rpm with 5 row of VSV. Any one has a clarification?
Please I need somes documents of LM 2500Speed is basically a function of the design of the axial compressor. GE-design Frame 5 heavy duty gas turbines were designed decades ago, before VSVs were considered for use on heavy duty gas turbines. And, a GE-design Frame 5 is physically much larger than a PGT-10/2, and trying to control speed and vibration on even a Frame 5-size machine when it was being designed (probably mostly with slide rules) was difficult if not impossible.
If I'm not mistaken, a PGT-10/2 is based on a much more recent aircraft engine design and construction methods, with lighter materials.
Finally, it's my understanding that VSVs are primarily used to, one, be able to increase the mass flow-rate of air through the axial compressor, and, two, when possible, to make the axial compressor smaller (shorter) and decrease the size (physical mass) of the axial compressor rotor.