Rotary wing aerodynamics represents a widely investigated topic due to this discipline’s large number of applications in several fields engineering and physics [...]

In this work we analyse the potential for a warp drive spacetime to develop instabilities due presence of quantum matter. Particularly, look points infinite blueshift (which are analogous black hole inner horizon, known its semiclassical instability), and categorise them through behaviour geodesics in their vicinity. We find that warp-drive bubbles dimension 2+1 or higher fact likely be stable,...

This paper presents a recently developed computational tool for aeroelastic analysis of aircraft performance. The computational tool couples a vortex-lattice code, Vorview, with an aeroelastic model that computes wing structural deflections under a combined coupled bending-torsion motion. The aeroelastic model of the wing structure is based on a one-dimensional structural dynamic theory using s...

This research investigated the relationship between athlete aerodynamics (based on peak frontal area during recovery phase) and finishing position for athletes in the 100m5000m wheelchair Athletics events. A retrospective analysis was performed on T54 classified male and female finalists (n=86) at the 2016 Rio Paralympic Games. Medalling female athletes more consistently favoured an aerodynamic...

Notwithstanding the developments made in recent decades in wind effects on structures, there is a need to revisit the current paradigms and to look for improved understanding concerning the nature of wind field, associated aerodynamics and the resulting load effects in light of the emerging themes: non-stationarity/non-homogeneity/transient wind events; mechanical/convective turbulence; unstead...

In support of the Columbia Accident Investigation, inviscid computations of the aerodynamic characteristics for various Shuttle Orbiter damage scenarios were performed using the Felisa unstructured CFD solver. Computed delta aerodynamics were compared with the reconstructed delta aerodynamics in order to postulate a progression of damage through the flight trajectory. By performing computations...

The objective of this study is to minimize the drag coefficient of aerodynamics bodies for a specified design Reynolds number regime. With the aerodynamics model the gradient of the objective function (drag coefficient) cannot be determined analytically. Furthermore, it is expected that the objective function is multi-modal, i.e. it shows more than one minimum. Therefore, the optimization algor...

Aerodynamic forces on bridges are commonly separated into static, self-excited, and buffeting force components. By delving into the relationships among force descriptors for static, self-excited, and buffeting components, novel perspectives are developed to unveil the subtle underlying complexities in modeling aerodynamic forces. Formulations for airfoil sections and those based on quasisteady ...

An unsteady aerodynamics model of a flexible unmanned air vehicle is presented in this paper. The unsteady aerodynamics results from structural vibrations of the flexible airframe which affect the airflow around it. The doublet lattice method, which is a potential flow based panel method, is used for obtaining the basic unsteady aerodynamics model. It gives the pressure distribution on a liftin...

The creation of an integrated rotorcraft conceptual and preliminary design framework at DLR involved the development of geometry and fuselage aerodynamics modules at the Institute of Aerodynamics and Flow Technology. After a short revision of the RIDE rotorcraft design environment architecture this paper focuses on the implementation of these disciplinary modules. The aim of the geometry module...