Calculation of Unsteady Transonic Aerodynamics for Oscillating Wings with Thickness

Unsteady Transonic Aerodynamic Analysis for Oscillatory Airfoils and Oscillating Flaps Using Dynamic Mesh

This paper presents an algorithm for unsteady transonic aerodynamic analysis by solving the two-dimensional unsteady Euler equations using a dynamic mesh algorithm. The driving algorithm is an upwind biased implicit second order accurate cell-centered finite volume scheme. The spatial discretization technique involves a naturally dissipative flux-split approach that accounts for the local wave ...

Helicopter Rotor Unsteady Aerodynamics

Unsteady helicopter rotor aerodynamics are complicated. This paper reviews some of the fundamentals and newer developments of unsteady helicopter aerodynamics. Rotor flow is beautiful and complex. Visualizing rotor flow allows for an appreciation of the following theories and solution attempts as well as nature’s complexities. The flow through a helicopter rotor with forward motion is shown in ...

Unsteady Transonic Nozzle Flow with Heat Addition

The aerodynamics of revolving wings I. Model hawkmoth wings.

Recent work on flapping hawkmoth models has demonstrated the importance of a spiral 'leading-edge vortex' created by dynamic stall, and maintained by some aspect of spanwise flow, for creating the lift required during flight. This study uses propeller models to investigate further the forces acting on model hawkmoth wings in 'propeller-like' rotation ('revolution'). Steadily revolving model haw...

Transonic and supersonic ground effect aerodynamics

A review of recent and historical work in the field of transonic and supersonic ground effect aerodynamics has been conducted, focussing on applied research on wings and aircraft, present and future ground transportation, projectiles, rocket sleds and other related bodies which travel in close ground proximity in the compressible regime. Methods for ground testing are described and evaluated, n...