The effect of dynamic prehistory of the flow and the channel‐expansion ratio on aerodynamics of a steady separated laminar flow behind a rectangular backward‐facing step located in a plane‐parallel channel is numerically studied. It is shown that the boundary layer upstream of the flow separation...
The Navier-Stokes equations are solved numerically for laminar viscous incompressible fluid flow in a plane duct with sudden expansion. The solution is compared with experiment.doi:10.1007/BF00860221V. I. KorobkoM. MalayaV. K. ShashminKluwer Academic Publishers-Plenum PublishersJournal of Engineering...
This image samples the frontal plane of a hovering hummingbird with velocity vectors (m s–1) and vorticity (s–1), representing rotational velocity about an axis extending perpendicular from the plane of the image. The bird is also in the background, in the first third of upstroke, which...
of the craft. Large wings usually generate a lot of lift, but they also produce a lot of drag. In designing airplane wings, engineers need to take into account such factors as the speed and altitude at which the plane will fly, so that they can find a wing shape that balances lift ...
So there will need to be a second step defining the means of manipulating the new sources of force and energy: a new technology. It will need a new name: “massdynamics” perhaps? The third stage will be the designing of prototype ‘engines’ and demonstration of feasibility. After this ...
in all aspects of aerodynamic design and analysis. Our experience encompasses the design and analysis of wide body airliner wings, instrumentation of a land speed record car, the conceptual and detail design of a 6,000 lb single engine turboprop and the design and manufacture of sailplane ...
a real bridge validated their proposed design. Vong [22] in his PhD thesis reported the aerodynamic disturbances associated with quadrotor flights inside a tunnel. He mentioned that the reduction of vertical component of velocity due to the ceiling plane had a dominant effect on altering the rotor...
When the shock formation is viewed from the apex of the leading edge, the steady three-dimensional flow field structure in each transverse plane appears as concentric circles or ellipses. This observation is in a perfect accord to the law of plane section or the equivalent principle; the steady...
Irminger’s pressure measurements anticipated by a decade similar measurements carried out by Nipher by means of a locomotive (Sect.7.1). 5. Marey was interested in all forms of motion; he studied the heart cycle, breathing, muscular contraction and motorial coordination. This forced him to inv...
This results in the condition that, on the ground, the plane falls over backward when the pilot is not in it. The EZ airplanes are tricycle gear planes with the engine in the rear. If it falls over backward, it generally causes serious damage. The main disadvantage of the RV family is...