Abstract
Presently, gas turbines utilize sophisticated cooling techniques, such as impingement cooling, convection cooling and film cooling, to get better engine durability and enhanced cycle performance. In this paper, study is undertaken to investigate the impact of transpiration cooling of gas turbine blade on the performance of a simple gas turbine cycle. Study also evaluates the effect of the cycle pressure ratio and turbine inlet temperature on coolant requirement of three different blade cooling methods, namely convection cooling, film cooling and transpiration cooling.
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Abbreviations
- f :
-
Fuel air ratio
- h :
-
Enthalpy (kJ/kg)
- v :
-
Specific volume (m3/kg)
- w :
-
Work done (kJ/kg)
- A :
-
Area (m2)
- P :
-
Pressure (N/m2)
- T :
-
Temperature (K)
- \(\dot{m}\) :
-
Mass flow rate (kg/s)
- c p :
-
Specific heat at constant pressure (kJ/kg K)
- St:
-
Stanton number
- λ :
-
Ratio of cooled blade surface area to hot gas flow area (Ab/Ag)
- ε :
-
Cooling effectiveness
- η :
-
Efficiency
- a:
-
Air
- b:
-
Blade
- e:
-
Exit
- g:
-
Gas
- f:
-
Fuel
- i:
-
Inlet
- com:
-
Compressor
- cl:
-
Coolant
- gt:
-
Gas turbine
- cc:
-
Combustion chamber
- aw:
-
Adiabatic
- pt:
-
Polytropic
- GT:
-
Gas turbine
- CPR:
-
Cycle pressure ratio
- HRSG:
-
Heat recovery steam generator
- TIT:
-
Turbine inlet temperature
- LCV:
-
Lower calorific value
References
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Kumar S, Singh O (2010) Thermodynamic performance evaluation of gas turbine cycle with transpiration cooling of blades using air vis-à -vis steam (Proceedings of the institution of mechanical engineers, part A). J Power Energy 224(8):1039–1047
Singh O, Prasad BN (2008) Influence of different means of turbine blade cooling on the thermodynamic performance of combined cycle. Appl Therm Eng 28:2315–2326
Shukla AK, Singh O (2016) Performance evaluation of steam-injected gas turbine based power plant with inlet evaporative cooling. Appl Therm Eng 102:454–464
Shukla AK, Singh O (2017a) Thermodynamic investigation of parameters affecting the execution of steam injected cooled gas turbine based combined cycle power plant with vapor absorption inlet air cooling. Appl Therm Eng 122:380–388
Shukla AK, Singh O (2017b) Thermodynamic analysis of steam-injected gas turbine cycle power plant with inlet air cooling. Int J Ambient Energy 38(6):556–566
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Shukla, A.K., Sharma, M., Singh, O. (2022). Thermodynamic Investigation of Transpiration Cooled Gas Turbine Blade. In: Muzammil, M., Khan, A.A., Hasan, F. (eds) Ergonomics for Improved Productivity. HWWE 2021. Design Science and Innovation. Springer, Singapore. https://doi.org/10.1007/978-981-16-2229-8_6
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DOI: https://doi.org/10.1007/978-981-16-2229-8_6
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