Welcome to MECH 2024

6th International Conference on Mechanical Engineering (MECH 2024)

March 09 ~ 10, 2024, Virtual Conference



Accepted Papers
Design and Thermomechanical Modeling of the Blade of an Air-cooled Gas Turbine

Mehdi BOUDOUH1, and Brahim Elkhalil HACHI1 Mohamed HABOUSSI2, 1Laboratory of Development in Mechanic and Materials (LDMM), Ziane Achour University, Djelfa, Algeria, 2Laboratory of Process and Materials Sciences (LSPM), Sorbonne Paris Nord University, UPR 3407 CNRS, F-93430, Villetaneuse, France

ABSTRACT

The proposed study constitutes a contribution to the establishment of a methodology and a model making it possible to identify the thermomechanical behavior of an air-cooled blade sector. To analyze this problem and highlight the causes of a failure observed on a turbine, we first carried out the 3D design of blade models with a four-digit series NASA profile. Then, we identified the actual operating parameters of the machine. The actual operating parameters of the machine. The thermomechanical behavior of the blade sector, stressed by the thermal loading under operating conditions, is analyzed using a finite element calculation code. This study constitutes a fairly important contribution to the modeling of the blade for the finite element analysis of the influence of the thermomechanical effect. It makes it possible to determine the stresses and deformations in the gas turbine blade. The maximum values of the Von Mises stresses were determined in order to assess the behavior of the material. Comparing the Von Mises stresses of both static and thermomechanical studies also allowed us to see the maximum and minimum deformation. The results are very encouraging from the design study of an aluminum blade, and the modeling in thermomechanical terms, the simulation protocol gives logical and coherent answers.

KEYWORDS

gas turbine, blade, thermomechanics, stress, displacement &Strain.


Effect of Titanium Oxide Nanoparticle Enrichment on the Tribological Properties of Sandbox Bio-lubricant

C.A. Popoola and O.S. Onyekwere, Department of Chemical Engineering, Federal University Wukari, Nigeria

ABSTRACT

This study investigated effect of titanium oxide nanoparticle additive on the tribological properties of sandbox bio-lubricant. Titanium oxide nanoparticle-enriched sandbox bio-lubricant was developed by adding varying concentrations of the nanoparticle to the sandbox lubricant. Central composite design of response surface methodology was used to set up experimental parameters in order to minimize the numbers of experiments. The parameters values used for the evaluation were: load (2 N, 5 N, 8 N), speed (150 rpm, 200 rpm, 250 rpm) and nanoparticle concentration (0 wt%, 0.75 wt%, 1.50 wt%). Effects of these values on wear rate, friction coefficient and flash temperature parameter were evaluated. The lowest values of coefficient of friction and wear rate were obtained at a speed of 200 rpm and concentration of 0.75 wt% with 2 N load, while the highest value of flash temperature parameter was obtained with 8 N load at the same speed and concentration. The optimal combinations of parameters for minimum coefficient of friction and wear rate as well as maximum flash temperature were: 8.0N load, 199.4949 rpm speed and 0.7121wt% concentration. The overall results revealed that titanium oxide nanoparticle added to sandbox lubricant improved the tribological properties of the lubricant by increasing the anti-friction and anti-wear capacity of the lubricant. This showed the potential of titanium oxide nanoparticle as additive for bio-lubricant production.

KEYWORDS

Sandbox seed oil, titanium oxide nanoparticle , tribology, bio-lubricant, lubrication.