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Analysis of repaired gas turbine and compressor blades

    Alexander Tishkunov Affiliation
    ; Sergejs Gluhihs Affiliation
    ; Aleksandrs Korjakins Affiliation
    ; Andris Popovs Affiliation

Abstract

In order to reach desired levels of efficiency and power output of jet engines, advanced gas turbine and compressor blades made from Ti‐6AL‐4V alloy operate at very high temperatures (up to 600°C) and speeds (up to 10000 rpm) [3–4]. Pressure of springing streams and inertial forces are main reasons of stress appearance in the blades. Besides that, blade usually could be out of action after one's edges had become damaged under temperature or foreign object hit negative influence. High cycle fatigue (HCF) accounts for 56 % of major aircraft engine failures and ultimately limits the service life of most critical rotating components. Extensive inspection and maintenance programs have been developed to detect, renew and replace defected blades, to avoid catastrophic engine failure. Various modern technologies including laser cladding (filling layers of sprayed material) allow prolongation of blades’ life by damaged part's renovation with alternate material. The general aim of the present work concludes of blades’ mechanical bahavour comparison before and after renewal.


Santrauka


Šiame darbe aprašoma, kaip buvo atliekama suremontuotų turbinos ir kompresoriaus menčių atsparumo analizė. Svarbiausia buvo palyginti ekvivalentinių įtampų rezultatus iki ir po menčių renovavimo alternatyvia medžiaga. Modelių, kurie buvo suprojektuoti kompiuterine programa SolidWorks, medžiaga buvo keičiama tose darbinės mentės briaunos vietose, kur buvo galimi eksploataciniai defektai.


First Published Online: 14 Oct 2010


Reikšminiai žodžiai: turbinos mentė, kompresoriaus mentė, modeliavimas, srautai, vidinis vėdinimas, nuostolių simuliavimas, medžiagų pakitimas, Von Mise ekvivalentinis stresas, pajėgumas, eksperimentas, rezultatų palyginimas.

Keyword : turbine blade, compressor blade, modelling, streams, internal cooling, damage simulation, material change, Von Mises equivalent stress, displacements, experiment, result comparison

How to Cite
[1]
Tishkunov, A., Gluhihs, S., Korjakins, A. and Popovs, A. 2008. Analysis of repaired gas turbine and compressor blades. Aviation. 12, 2 (Jun. 2008), 46-50. DOI:https://doi.org/10.3846/1648-7788.2008.12.46-50.
Published in Issue
Jun 30, 2008
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