Mechanical Engineering

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Mechanical Engineering

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    DEVELOPMENT OF A BRAKE DRUM MODEL WITH FINS INCORPORATION FOR HEAT DISSIPATION ENHANCEMENT
    (5th Multi-disciplinary academic conference, Ahmadu Bello University, Zaria. January 11, 2018. Pp. 190 – 205., 2018-01-11) Bako, .S.; Bori Ige
    Extreme heat within an automobile brake drum could cause brake failure which could as well lead to death of passengers and lost of properties. One of the ways to dissipate heat faster from an automobile brake drum is by incorporating fin on the outer surface of the brake drum as pointed out in many literatures. This work concerns converting 1/10 0f the overall height thickness of the brake drum into fins for effective heat dissipation by both conduction and convection. During the modified brake drum development process, necessary fin design formulae were taken into account. Modeling and simulation analysis were carried out using Solidworks (2013) software, followed by validation using theoretical Finite Element analysis. The minimum temperatures obtained from the simulation analysis were 4935K and 4927K for the existing and the modified brake drum model respectively. While maximum displacements obtained from the simulation analysis were 5142×10−5𝑚𝑚 and 5102×10−5𝑚𝑚 for the existing and the modified brake drum model respectively. This implies that the modified brake drum have improved strength and better heat dissipation than the existing model. This is as the result of the circumferential arrangement of the fins on the outer surface of the brake drum.
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    Spectral Analyses Study of Boundary Layer Transition Delay with a Finite Compliant Panel
    (Accra Bespoke Multidisciplinary Innovations Conference, University of Ghana, Legon, Accra, Ghana, 2022-06-01) Bori Ige; Yeo, .K. S.; Bako, .S.
    Compliant panel or surface has been demonstrated in various theoretical investigations as a promising means in delaying transition further. Within the Blasius boundary layer, wavepackets was initiated at the flow upstream with a pulse-initiated disturbance, and this was allowed to evolve over a finite section of the wall that was replaced by a tensioned compliant panel (CP) on a damped foundation. In order to appreciate the work of the CP in transition delay, direct numerical simulation (DNS) was also carried on the rigid wall (RW) case for comparison purposes. Spectral (Double-Fourier transforms) analyses was performed on the obtained DNS data, and the results showed that, CP case was able to delay transition further, through the strategy of suppressing the linearly growing primary 2-D Tollmien-Schlichting (TS) waves mode, so that resultant wavepacket after the CP location was dominated by a pair of oblique waves. The practical implication of the obtained results show the possibility of drag force reduction over moving vehicles, which will translate to tangible economic gains for the total amount being spent on fuelling especially for those in transportation businesses.