Finite element simulation of stress distribition through novel duplex thermal barrier coatingused in turbofan internal combustion engine

سال انتشار: 1394
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 88

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شناسه ملی سند علمی:

ISME23_663

تاریخ نمایه سازی: 9 دی 1403

چکیده مقاله:

An attempt was made to investigate the thermal andresidual stress distribution in a novel three layer(La۲Zr۲O۷/ ۸YSZ/ NiCrAlY) during a real-like heatingregime which includes heating, service time and finalcooling. For achieving maximum accuracy andconsistency in calculation of thermal and mechanicalproperties of hybrid coating system, all related andrequired properties were introduced to the software intemperature- dependent mode. Element modificationapproaches like mass scaling leads to a considerablereduction in running time while satisfying and notviolating accuracy and converging criteria andconstrains. Applying adaptive hybrid meshingtechniques which applies both mesh – part dependencyand independency during numerical iterative solutionavoids element distortion and diverging in coupledproblem. Heat flux and nodal temperature contoursindicated that, most of damaging and harmful thermalload and residual stress concentrate on ceramic top coatsand this lead less harm and life time reduction insubstrate.

کلیدواژه ها:

Thermal barrier coating-Residual stresses-Finite element simulation- Thermal shock

نویسندگان

Nasim Nayebpashaee

PhD Student, Iran University of Science and Technology, School of metallurgy & material Engineering .MSc graduated, Payam noor University, School of Mechanical Engineering

Hossein Vafaeenezhad

PhD Student, Iran University of Science and Technology, School of metallurgy & material Engineering.Out sourcing department, oil turbocompressor engineering company (OTEC), Tehran, Iran

Mohammad-Reza Aboutalebi

Professor, Iran University of Science and Technology, School of metallurgy & material Engineering,

Seyed Hossein Seyedein

Associate Professor, Iran University of Science and Technology, School of metallurgy & material Engineering,

SeyyedMohammad Mehdi Hadavi

Associate Professors, Malek Ashtar University of technology,

Hossein Sarpoolaky

Associate Professor, Iran University of Science and Technology, School of metallurgy & material Engineering,