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- 저자 : ChingSeong Tan (검색결과 2 건)
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JongBoon Ooi,Xin Wang,ChingSeong Tan,Jee-Hou Ho,Ying Pio Lim 대한기계학회 2012 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.26 No.2
The portal axle is a gearbox that is specially designed for off-road driving conditions. It is installed between the wheel and the axle shaft to give higher ground clearance to the vehicle. The modeling and simulation of spur gears in portal axle is important to predict the actual motion behavior. However, gear train design in portal axle is difficult to study comprehensively due to their relatively low cost and short product life cycle. In this study, modal analysis of portal axle is simulated using finite element method (FEM). Modal analysis is simulated on three different combinations of gear train system commonly designed for portal axle. The three gear trains being analyzed are gear train without idler gear, one idler gear and two idler gears. FEM static stress analysis is also simulated on three different gear trains to study the gear teeth bending stress and contact stress behavior of the gear trains in different angular positions from 0° to 18°. The single and double pair gear teeth contact are also considered. This methodology serves as a novel approach for gear train design evaluation,and the study of gear stress behavior in gear train which is needed in the small workshop scale industries.
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Numerical investigation on Coanda flow over a logarithmic surface
CaiYin Gan,Khairul Salleh Mohamed Sahari,ChingSeong Tan 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.7
The Coanda effect has been introduced into lift generation designs. In this paper, a logarithmic spiral surface is introduced as a curvatureshape to evaluate the development of jet flow along the Coanda curvature. Moreover, 2D computational fluid dynamics numericalsimulation is adopted to measure velocity profile, jet width growth, maximum velocity decay, and surface static pressure along the curvaturesurface. A parametric study on the effect of varying exit jet heights on the Coanda effect is also presented. Results show that jetwidth grows proportionally along the curved surface, and the proportional decay of maximum velocity and surface pressure is lower thanthe atmospheric pressure. A wider exit jet height produces lower static pressure on the unmanned aerial vehicle surface and a slowermaximum velocity decay. Overall parametric analysis of varying exit jet heights shows that the effective range of d/R is 0.1 to 0.14.
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