
Cibin JosephBrigham Young University | BYU · Department of Mechanical Engineering
Cibin Joseph
Doctor of Philosophy
Research Associate at BYU
About
10
Publications
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32
Citations
Introduction
Additional affiliations
July 2014 - December 2020
Education
July 2010 - July 2014
Publications
Publications (10)
Large-scale gradient-based Multidisciplinary Design Optimization (MDO) can aid in the
exploration of high-dimensional design spaces for novel air vehicle concepts, thereby leading to more efficient and economic designs. This paper builds on past works where we demonstrated large-scale physics-based MDO capabilities and applied these to NASA’s lift-...
We present compact closed-form expressions of the lift and moment coefficients predicted by thin-airfoil theory for camber line geometries of the NACA 4 and 5-digit airfoils and a generalized polynomial thin-airfoil. For the generalized camber curve, the solution is achieved by means of the integral form of the beta function. These general solution...
The development, validation, and applications of an object-oriented free-wake solver for multi-rotor and fixed-wing systems are outlined here. Advantages of utilizing the object-oriented philosophy for modeling the multi-rotor/wing free-wake problem are described. To explore the feasibility of utilizing conventional desktop workstations, the vortex...
Cheeseman's factor for ground effect-based on image sources-has widely been used to account for the increase in thrust experienced by a lifting rotor in ground effect. However, for elevations lesser than half the rotor radius, the factor is known to drastically over predict this thrust augmentation. Even though these elevations may not be viable to...
A well-known phenomenon in rotorcraft, the ground effect, occurs when a rotor is at close proximity to the ground creating an obstruction to the trailing wake from the rotor. This results in an increase in thrust and a decreased inflow through the rotor disk, in turn affecting handling qualities. Until recently, analytical modelling of ground effec...
Rotorcraft flying in close proximity to ground are known to generate a larger thrust due to the shed wake being obstructed by the ground. The effect has been well researched and empirical corrections are available in literature. However, studies on the influence of side walls on ground effect is still lacking. Such studies may be applied to full sc...