Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO2019033080) APPARATUS AND METHOD FOR FLUID MANIPULATION
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

What is claimed:

1. An intentional fluid manipulation apparatus (IFMA) assembly, the IFMA comprising: a first thrust apparatus configured to impart a first induced velocity to a local free stream flow during a nominal operation requirement, the first thrust apparatus creating a streamtube; a second thrust apparatus, the second thrust apparatus being located in a downstream portion of the streamtube, with the second thrust apparatus being configured to impart a second induced velocity to the local free stream flow, wherein the second induced velocity at the location of the second thrust apparatus has a component in a direction opposite to the direction of the first induced velocity at the location of the second thrust apparatus.

2. The IFMA assembly of claim 1, wherein the second thrust apparatus is configured to produce the second thrust with a vector component parallel to, and aligned with, the direction of an induced velocity vector of the first thrust apparatus at the location of the second thrust apparatus in the streamtube.

3. The IFMA assembly of claim 2, wherein the thrust of the second thrust apparatus is calculated over at least a portion of an area of overlap between the streamtube of the upstream thrust apparatus and a second streamtube of the second thrust apparatus.

4. The IFMA assembly of claim 1, wherein the nominal operation requirement is for providing a net thrust, wherein the net thrust is equal to a first thrust vector of the first thrust apparatus plus a second thrust vector of the second thrust apparatus in an inertial frame.

5. The IFMA assembly of claim 4, wherein an induced power required for the production of the net thrust is reduced compared to a scenario in which the second thrust apparatus has a negligible effect on the fluid flow.

6. The IFMA assembly of claim 1, wherein at least a portion of one of the first or second thrust apparatuses extracts power from a non-zero free stream flow.

7. The IFMA assembly of claim 1, wherein a boundary apparatus spatially separates the first thrust apparatus from the second thrust apparatus.

8. The IFMA assembly of claim 7, wherein the first and second thrust apparatuses are configured to reduce drag losses of the boundary apparatus.

9. The IFMA assembly of claim 1, wherein the first and second thrust apparatuses comprise open rotors or ducted rotors.

10. An intentional fluid manipulation apparatus (IFMA) assembly, the IFMA

comprising:

a boundary apparatus having an outside surface, the boundary apparatus being configured to move relative to a surrounding fluid; and

an intentional momentum carrying apparatus (IMCA) coupled to the boundary apparatus frame, the IMCA being coupled to the boundary apparatus in a manner to reduce a flow velocity gradient in the proximity of the outside surface of the boundary apparatus frame.

11. The IFMA assembly of claim 10, wherein the IMCA is one of a plurality of DVICAs coupled to the boundary apparatus frame, the plurality of IMC As being coupled to the boundary apparatus in a manner to reduce flow velocity gradient in the proximity of the outside surface of the boundary apparatus frame.

12. The IFMA of claim 1 1, wherein the plurality of IMCAs comprises a leading IMCA located upstream of the boundary apparatus frame, the leading IMCA being configured to generate a streamtube that extends from a trailing edge of the leading FMCA to encompass the boundary apparatus frame.

13. The IFMA of claim 12, wherein the plurality of IMCAs comprises one or more of a middle IMCA located around a portion of the boundary apparatus frame, the middle IMCA is not in the wake of the upstream IMCA.

14. The IFMA of claim 12, wherein the middle IMCA is configured to cause the streamtube to be incident on a leading edge stagnation line of the middle FMCA.

15. The IFMA of claim 14, wherein the plurality of IMCAs comprises a trailing IMCA located downstream of the boundary apparatus frame, the trailing FMCA being configured to encompass the streamtube from the middle IMCA at a leading edge of the trailing IMCA.

16. The IFMA of claim 13, wherein the plurality of IMCAs comprise a plurality of circular ducts.

17. The IFMA of claim 16, wherein each duct of the plurality of ducts is configured to produce a lift force with a component in a radially outward direction with respect to an axis of direction the boundary apparatus is configured to move relative to.

18. The IFMA of claim 16, wherein the plurality of IMCAs are configured to reduce the magnitude of the flow velocity at the outside surface of the boundary apparatus in a full-slip scenario.

19. The IFMA of claim 18, wherein the reduction of the magnitude of the flow velocity results in a lower skin drag at the outside surface in a no-slip scenario.

20. An intentional fluid manipulation apparatus ("IFMA") assembly, the IFMA comprising a first means for creating a first induced velocity resulting in a streamtube and a second means for creating a second induced velocity that intentionally modifies the streamtube, wherein the second induced velocity has a component in a direction opposite to the direction of the first induced velocity,

wherein a net thrust is required from the IFMA assembly to fulfill a nominal operating condition, wherein the net thrust is equal to a first thrust vector of the first means plus a second thrust vector of the means, the first thrust having an induced power for providing the net thrust, the induced power being reduced by the second thrust as compared to a reference scenario in which in which the second means has a negligible effect on the fluid flow,.

wherein the induced power can be positive or negative

21. An aircraft comprising:

wings and a fuselage;

a downstream thrust apparatus affixed to the fuselage, the down stream thrust apparatus configured to apply a first thrust vector, the aircraft having a flight direction along a direction of a first thrust vector during nominal level cruise;

an upstream thrust apparatus affixed to the fuselage, the upstream thrust apparatus configured to apply a second thrust vector opposite to the first thrust vector, the second thrust vector reducing the spatial flow velocity gradients in a vicinity of the fuselage during nominal level cruise.

22. The aircraft of claim 21, wherein the upstream thrust apparatus comprises a ducted fan configured to decelerate fluid flow prior to encountering a fan disc located within the ducted fan.

23. The aircraft of claim 22, wherein the upstream thrust apparatus is configured to extract energy from the fluid flow.

24. The aircraft of claim 23, wherein the upstream thrust apparatus is configured to electrically or mechanically transfer at least a portion of the energy to the downstream thrust apparatus.

25. The aircraft of claim 21, wherein the magnitude of the first thrust vector is larger than the magnitude of the second thrust vector.

26. A fluid manipulation apparatus comprising:

a boundary apparatus having a surface configured for interacting with a fluid; and an intentional fluid manipulation apparatus (IFMA) assembly coupled to the boundary apparatus, the IFMA assembly being configured to decrease the spatial flow velocity gradients in the vicinity of the surface of the boundary apparatus.

27. The fluid manipulation apparatus of claim 26, wherein the IFMA assembly comprises at least one intentional momentum carrying apparatus (FMCA) coupled to the boundary apparatus frame.

28. The fluid manipulation apparatus of claim 27, wherein the at least one IMCA is one of a plurality of IMCAs coupled to the boundary apparatus frame

29. The fluid manipulation apparatus of claim 26, wherein the IFMA assembly comprises an upstream intentional momentum shedding apparatus (EVISA) configured to impart a first induced velocity to the local free stream flow.

30. The fluid manipulation apparatus of claim 29, wherein the IFMA assembly comprises a downstream EVISA configured to impart a second induced velocity to the local free stream flow.

31. The fluid manipulation apparatus of claim 30, wherein a thrust vector associated with at least one of the upstream IMSA and downstream IMSA is in substantially the same direction as the local free stream flow.

32. The fluid manipulation apparatus of claim 30, wherein the boundary apparatus is located between the upstream IMSA and the downstream IMSA.

33. The fluid manipulation apparatus of claim 30, wherein at least one of the upstream IMSA and downstream IMSA is configured to extract energy from the fluid flow.

34. The fluid manipulation apparatus of claim 33, wherein energy is electrically or mechanically transferred between the upstream IMSA and downstream IMSA.

35. The fluid manipulation apparatus of claim 30, wherein at least one of the upstream IMSA and downstream IMSA comprises a propeller.

36. The fluid manipulation apparatus of claim 26, wherein the decreased velocity of the local free stream flow reduces drag of the boundary apparatus.

37. The fluid manipulation apparatus of claim 36, wherein velocity of the local free stream flow of the boundary apparatus is reduced.