Patent ID: 11946497
Assignee: 13 MARI LTD
Field: Transport (Mechanical engineering)
Classification: CPC F  B  Y | IPC B  F

Claim 8:
9. An apparatus for reducing drag, or improved stall characteristics, or improved heat exchange comprising:
a body having at least one body surface; and
at least one device on the body surface;
wherein the device is configured to produce turbulence with minimal fluid separation;
wherein the turbulence produced extends with the flow directly behind the device and stays close to the surface;
wherein the close to the surface turbulence assists the heat exchange in a convectional manner;
wherein the turbulence extends directly behind the device and with its low dynamic pressure promoting downward, toward the surface fluid motion stabilizing the flow;
wherein the turbulence produced is in the form of a plurality of counter rotating, just touching vortices appearing as tubes down the fluid flow;
wherein the turbulence produced is in the form of two counter rotating, just touching vortices appearing as tubes down the fluid flow, or in the form of quadruple, two by two counter rotating vortices appearing as tubes down the fluid flow, or in the form of plurality of counter rotaiting vortice pairs; and
wherein the device includes a structure in a form of a barchan dune, and the structure includes two elongations at a leeward side of the dune.