US 12,129,009 B2
Flettner rotor with localized suction
Rajat Mittal, Vienna, VA (US); Jung Hee Seo, Baltimore, MD (US); Christopher Williams, Wakefield, MA (US); and Rui Ni, Baltimore, MD (US)
Assigned to The Johns Hopkins University, Baltimore, MD (US)
Appl. No. 17/922,575
Filed by THE JOHNS HOPKINS UNIVERSITY, Baltimore, MD (US)
PCT Filed Apr. 30, 2021, PCT No. PCT/US2021/030283
§ 371(c)(1), (2) Date Oct. 31, 2022,
PCT Pub. No. WO2021/222819, PCT Pub. Date Nov. 4, 2021.
Claims priority of provisional application 63/017,941, filed on Apr. 30, 2020.
Prior Publication US 2023/0174208 A1, Jun. 8, 2023
Int. Cl. B63H 9/00 (2006.01); F03D 3/00 (2006.01); F03D 9/32 (2016.01)
CPC B63H 9/00 (2013.01) [F03D 3/005 (2013.01); F03D 9/32 (2016.05); F05B 2240/201 (2013.01); F05B 2240/931 (2013.01); F05B 2260/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for propulsion comprising:
an outer shroud having a surface defining an interior space, wherein the surface of the outer shroud is porous to allow fluid flow through the surface, and wherein the outer shroud is configured to rotate with an angular velocity;
a circular-arc insert disposed within the interior space of the outer shroud, wherein the circular-arc insert is configured to rotate to any fixed position; and,
a suction port formed by adjusting a space formed by the circular-arc insert.
 
14. A device for propulsion comprising:
an outer shroud having a surface defining an interior space, wherein the surface of the outer shroud is porous to allow fluid flow through the surface, and wherein the shroud is configured to rotate with an angular velocity;
an inverse flow manifold disposed within the interior space of the outer shroud, wherein the insert is configured to rotate to any fixed position; and,
a suction port wherein a location of the suction port is determined by rotation of the inverse flow manifold.