Patent ID: 8651813
Filing Date: 2014-02-18
Classification: B63B,B63H,B64C,B64D,F01D,F01P,F04D,F15D,Y02T

Abstract:
1. A fluid dynamic body configured to move through a fluid; wherein the fluid is a liquid or a gas, said fluid dynamic body comprising: a foil-shaped body having a thickness, a chord direction and a span dimension, said foil-shaped body having at least one passage therethrough, said at least one passage being formed as an escapelet leading from an inlet in a first higher pressure surface of said foil-shaped body to an outlet in a second lower pressure surface of said foil-shaped body, an inner surface of said escapelet being specifically contoured so as to provide primarily streamlined laminar flow through the at least one passage, said escapelet having a thickness, a chord direction and a span dimension defined by contoured endwalls at each spanwise end thereof, said endwalls effective for directing momentum of a mass fluid flow exiting from said escapelet, said outlet being located downstream of said inlet with a center-of-inlet to center-of-outlet mean line oriented at an angle ranging anywhere from 10° to 80° with respect to a chord line of said foil-shaped body, said outlet being directed streamwise, said inlet with an inlet measure of at least 0.85% of a local chord length of said foil-shaped body and said outlet with an outlet measure of at least 0.75% of said local chord length, said outlet having a size in a range from 10% to 110% of a size of said inlet, said outlet of the escapelet being contoured and positioned such that the mass fluid flow exiting in a streamwise direction from the escapelet redirects spanwise fluid flow over the foil-shaped body toward a less spanwise and more streamwise direction, thereby energizing stagnant flow in various areas and reducing induced and interference drag and also thereby reducing vortex generation, so as to improve control, and reduce energy and fuel consumption by maintaining improved flow over the surfaces of the foil-shaped body thus preempting undesirable flows that create higher drag and loss of control.