Apparatus and method for transferring a Bingham solid through a long conduit
Corrugated pipe Patent #: 4852616
ApplicationNo. 729743 filed on 07/12/1991
US Classes:137/13, Affecting flow by the addition of material or energy137/803, FLOW AFFECTED BY FLUID CONTACT, ENERGY FIELD OR COANDA EFFECT (E.G., PURE FLUID DEVICE OR SYSTEM)138/121Corrugated
ExaminersPrimary: Cohan, Alan
Attorney, Agent or Firm
International ClassF17D 001/20
AbstractA method and apparatus for reducing drag and noise associated with fluid w within a conduit is provided. The conduit has flexible walls that are shaped to form stationary waves having peaks and troughs and are repeated in the axial direction of the conduit. The stationary waves are moved along the axial direction of the conduit whereby a vortex is trapped in the fluid flow at each of the troughs. Each of the vortices forms part of an isolating layer between the conduit wall and the main stream of the fluid flow thereby reducing drag. Furthermore, the vortices push the dominant noise producing region toward the center of the fluid flow where sound coupling efficiency is lower.