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Gas TurbineCombustionand Power

Generation

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Outline

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TURBINES: Machines to etract!uid "ower #rom !owin$ !uids.

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PRINCIP%E O& OPER'TION O&G'S TURBINES

Inta(e

-Slow down incomingair

-Remove distortions

Com"ressor-Dynamically Compress

air

Combustor

-Heat addition throughchemical reaction

Turbine-Run the compressor

No))le* &ree Turbine

-Generation of thrustpower/shaft power

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'd+anta$es and ,isad+anta$es

',-'NT'GES

-Great "ower.to.

wei$ht ratio compared toreciprocating engines.

-Smaller than their

reciprocatingcounterparts of thesame power.

-%ower emission levels

 ,IS',-'NT'GES

-E"ensi+e:

-high speeds and high

operating temperatures -designing and manufacturing

gas turbines is a tough

problem from both theengineering and materials

standpoint

- Tend to use more #uel whenthey are idling

- They prefer a constantrather than a !uctuatin$load.

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Needs #or &uture GasTurbines

-Power Generationuel !conomy

"ow !missions

#lternative fuels-$ilitary #ircrafts

 High Thrust

"ow %eight

-Commercial #ircrafts

"ow emissions

High Thrust

"ow %eight

uel !conomy

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'natom/ o# ' 0etEn$ine

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Bra/ton C/cle

1-2Isentropic compression (in a compressor)

2-3Constant pressure heat addition

3-4Isentropic expansion (in a turbine)

4-1Constant pressure heat rejection 

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P+1 Ts dia$rams

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Gas TurbineCombustion

 

/# & '(')

Combustion e*ciency + ,-.

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On$oin$ Research

-!ect of inlet disturbances-Combustion in recirculating

0ows-Spray Combustion

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Conclusions

-Disturbances can lead to combustionoscillations

-Recirculating 0ow helps in reducingdisturbances-Spray combustion reduces 123

emissions through fuel staging

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#ny

4uestions?

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T2'N3 4OU