Mechanical Engineering
Permanent URI for this collectionhttp://197.211.34.35:4000/handle/123456789/152
Mechanical Engineering
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Item IMPROVEMENT OF HEAT DISSIPATION RATE OF AN AUTOMOBILE BRAKE DRUM USING FINS INCORPORATION(Bartin University, Turkey, 2018-12-31) Bako, .S.; Bori Ige; Musa, .N.; Nasir, .A.The concept of incorporation of fins in automobile brake drum came up as a measure to subdue or address the thermal problems associated with it, which ultimately leads to brake failure. In order not to compromise the original weight of brake drum,1/10th of the overall wall thickness of the brake drum was converted into fins on the outer surface of the brake drum for effective heat dissipation. Modeling and simulation analysis were carried out using Solidworks (2013) software, on both the existing and modified brake drum, followed by validation using theoretical finite element analysis. The minimum temperatures observed from the simulation analysis were 4935K and 4927K for the existing and the modified brake drum model respectively. While maximum von Mises stress were 22, 378.9 N/M2 and 21, 971.2 N/M2 and the maximum displacements were 5142 x 10(-5)and 5102 x 10(-5) for the existing and the modified brake drum model respectively. This implied that the modified brake drum have improved strength and better heat dissipation rate than the existing model.Item Cavitational Deterioration of Diesel Power Plant Cylinder Liner(Journal of Mechanical and Energy Engineering, 2020-12-10) Bako, .S.; Nasir, .A.; Bori Ige; Musa, .N.The generating station in which diesel engine is used as a prime mover for generating electrical energy is known as diesel power plant. The cylinders liner are cylindrical component that are fixed inside the engine block. The function of the cylinder liners is to retain the working fluid and to guide the piston. Most diesel power plant uses wet-cylinder liners that are exposed to intensive cavitation. The paper aimed at studying the behavior of the cylinder liners that can lead to cavitation. The analysis involves, modeling and simulation in using Solidworks Software. The analysis shows that the cylinders are subjected to harmonic vibration resulting to momentary separation of the coolant from the cylinder wall, creating a pressure difference around the coolant surface which forms air bubbles. These bubbles explode at an extreme velocity. The explosion of these bubbles release surface energy known as cavitation. The energy hammers the cylinder liner surface thereby removing minute particles of metal from the surface of the vibrating cylinder leading to cavitational deterioration. The paper hereby calls on automotive designers to take critical measures in designing of; cylinder liner, water jacket and the entire cooling system, in order to control this phenomenon.