TORNADO concept and realisation of a rotor for small VAWTs
Journal Title: INCAS BULLETIN - Year 2013, Vol 5, Issue 3
Abstract
The concept of a three-tier configuration for a vertical axis rotor was successfully developed into a experimental model. The rotor assembly is divided into three tiers with three straight blades in each tier. The three-tiers are shifted by an angle of 400 generating a full helical flow field inside the rotor. Thereby the new configuration has some different mechanism of torque generation as other Darrieus rotors. The three-tier configuration facilitates the operation by enabling the turbine to self-start at wind velocity as low as 2 m/s with good performance and a smoother driving torque. At the same time the design couples an esthetic appearance with low noise level.
Authors and Affiliations
Horia DUMITRESCU, Alexandru DUMITRACHE, Florin FRUNZULICA, Anton PAL, Valeriu TURBATU
Turbulent Boundary Layer at Large Re
The fluids as deformable bodies without own shape, when starting from rest, experience interactions between the flowing fluid and the physical surfaces marking the bounds of flow. These interactions are a kind of impact...
Aircraft noise footprint for Bucharest – Sophia flights
Studies of impact noise have traditionally focused on landing and takeoff procedures in the airports vicinity. Beside these studies, en-route noise is considered an issue when we talk about noise in natural reservation o...
Analytical solutions of a particular Hill's differential system
Consider a second order differential linear periodic equation. This equation is recast as a first-order homogeneous Hill’s system. For this system we obtain analytical solutions in explicit form. The first solution is a...
Tribological aspects of dynamic seals with O-rings used in aircraft hydraulic equipment
Depending on the operating parameters, a dynamic sealing system with O-rings can be in different friction modes: dry, limit, mixed or fluid. Modification of the friction mode occurs throughout the operating life, but als...
An Embedded Boundary Algorithm for Large Eddy Simulations in Complex Geometries
The paper presents a novel implementation of the embedded boundary algorithm in a Large Eddy Simulation CFD algorithm. The embedded boundary method aims at allowing the simulation of complex geometry flows on Cartesian c...