There are two main types of fluid flow - laminar flow, in which the fluid flows smoothly in layers, and turbulent flow, which is characterised by chaotic motion and large amounts of mixing. In ...

The performance of a prospective candidate vertical axis wind turbine airfoil S1223 has been investigated at Reynolds numbers of 55,000, 75,000, and 100,000. The airfoil was tested at angles of attack ...

In laminar airfoils, however, this drag reduction occurs only in a limited flight range, i.e. for certain flow velocities and angles of attack. If this range is left, laminar conservation fails and ...

High-performance airfoils behave differently.Patrick Veillette, Ph.D. Upon his retirement as a non-routine flight operations captain from a fractional operator in 2015, Dr. Veillette had ...

Natural laminar flow (NLF) airfoils are key to achieving optimum performance and fuel efficiency in many vintage and current production turbine-powered business aircraft. NLF is not a new discovery.

A new simulation approach has enabled a first practical, and highly accurate, computation of the noise characteristics of complex three-dimensional airfoil designs under extreme operating ...

The book “Turbulent Flow and Boundary Layer Theory: Selected Topics and Solved Problems ” is focused on the outgrowth of our several years of teaching postgraduate courses in mechanical ...

These perturbations will gradually disappear in laminar flow, but if the flow is turbulent, they'll grow and produce chaotic motion. The transition, then, is the critical point between these two.