Thermo-Structural Analysis of First Stage Gas Turbine Rotor Blade Materials for Optimum Service Performance

Yıl 2018, , 118 - 130, 15.08.2018

Aniekan Ikpe , Oghenefejiro Efe-ononeme Godfrey Ariavie

https://doi.org/10.24107/ijeas.447650

Cited By: 6

Öz

During gas
turbine operation, the vibration that occurs at high speed, hot gases entering
the combustion chamber and other operational factors affect the longevity of
gas turbine blade. This paper is focused on the
selection of suitable materials that can withstand the severe working condition
and thermo-structural
analysis using Finite Element method (FEM) to determine the behaviour of each material under service
condition. Cambridge Engineering Software (CES) was employed in the material
selection process where GTD111, U500 and IN 738 were identified prior to
analyzing U500 and IN 738 due to desired mechanical properties over GTD111.
Employing ANSYS R15.0 in the steady
state thermal analysis, maximum service temperature of 736.49^oC
and maximum Total heat
flux of 4.345x10⁵ W/m² was obtained for IN 738 material while maximum service
temperature of 728.29^oC and maximum Total heat flux of 4.1746x10⁵ W/m²
was obtained for U500 blade
material. For structural static analysis, maximum von-mises stress of 454 MPa
and total deformation of 0.16221 obtained for IN 738 while maximum von-mises
stress of 416 MPa and total deformation of 0.12125 was obtained for U500 blade material. While the FEA
analytical results for both materials exhibited less variations between each
other, IN 738 displayed better thermal characteristics, whereas, U500 presented
satisfactory structural static results and above all, von-mises stresses
obtained for both materials was below their yield strength and melting
temperature. Hence, gas turbine blade materials should be assessed thoroughly
for structural and thermal conditions before manufacturing.

Anahtar Kelimeler

Gas turbine, Turbine blade, Temperature, Material properties, Stress

Kaynakça

• Sulaiman, K.S., Rameshkumar, G.R., Vibration Diagnosis Approach for Industrial Gas Turbine and Failure Analysis, British Journal of Applied Science & Technology, 14(2), 1-9, 2016.
• Kalapala P., Prasad, B.A., Anandarao, M., Material Optimization and Dynamic Approach for performance criteria in application to Gas Turbine Blade to overcome resonance; International Journal of Scientific & Engineering Research, 8(6), 189-196, 2017.
• Hassan M., Vibratory Analysis of Turbomachinery Blades, Rensselaer Polytechnic Institute, Hartford, Connecticut, 2008.
• Gharzwan M.A., High Cycle Fatigue Testing of Steel for Federal Aviation Administration (FAA), Department of Mechanical Engineering, California State University, Sacramento, (2017).
• Mohamad, B.A., Abdelhussien, A., Failure Analysis of Gas Turbine Blade Using Finite Element Analysis, International Journal of Mechanical Engineering and Technology (IJMET) 7(3), 299-305, 2016.
• Boyce, M.P., The Gas Turbine Handbook, Gulf Professional Publishing, Houston Texas, 2nd edition 2002.
• Ikpe A.E., Owunna I., Ebunilo, P.O., Ikpe, E., Material Selection for High Pressure (HP) Turbine Blade of Conventional Turbojet Engines, American Journal of Mechanical and Industrial Engineering 1(1), 1-9, 2016.
• Nathan, S., Jewel in the Crown: Rolls-Royce’s Single-Crystal Turbine Blade Casting Foundry, [online] available at, https://www.theengineer.co.uk/issues/june-2015-online/jewel-in-the-crown-rolls-royces-single-crystal-turbineblade-casting-foundry/, 2015.
• Choi Y, Lee K, Investigation of blade failure in a gas turbine, Journal of Mechanical Science and Technology, 24(10), 1969-1974, 2010.
• Umamaheswararao, L., Mallikarjunarao, K., Design and analysis of a gas turbine blade by using FEM, International Journal of Latest Trends in Engineering and Technology (IJLTET), 4(4), 19-24, 2014.
• Kumar. R.R. Pandey, K.M., Static Structural and Modal Analysis of Gas Turbine Blade, IOP Conference Series, Materials Science and Engineering 225(012102), 1-9, 2017.
• Sushila, R., Atul, K.A. Vikas, R., Failure Analysis of a First Stage IN738 Gas Turbine Blade Tip Cracking in a Thermal Power Plant, Case Studies in Engineering Failure Analysis, 8, 1-10, 2017.
• Rao, V.N., Kumar, I.N., Madhulata, N., Abhijeet, A., Mechanical Analysis of 1st Stage Marine Gas Turbine Blade, International Journal of Advanced Science and Technology, 68, 57-64, 2014.
• Nageswara, R.M., Materials for Gas turbines, Advances in Gas Turbine Technology, 293-314, Intech Publisher, ISBN: 978-953-307-611-9, 2011.
• Bhupendra, E.G., Sachin, V.B., Kapil B.S., Vibration Analysis of Gas Turbine Blade Profile Using FEM Technique and Tool, International Journal of Research in Advent Technology, 2(1), 182-189, 2014.