Duct arrangement and method
AssigneeBAE SYSTEMS plc
InventorsCallum Stark, Weichao Shi
Life of this patent
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Abstract
According to the present disclosure there is provided a duct arrangement for influencing fluid flow, the duct arrangement comprising: a duct section arranged to receive a fluid flow therethrough, the duct section defining a first direction through the duct section from a fluid inlet end to a fluid outlet end; a rotor housed in the duct section, the rotor comprising one or more rotor blades; and a vortex generator surface housed in the duct section, the vortex generator surface arranged to induce vortices in the fluid flow through the duct section.
Claims21
A duct arrangement for influencing fluid flow, the duct arrangement comprising:
- a first duct section arranged to receive a fluid flow therethrough, the first duct section defining a first direction through the first duct section from a fluid inlet end to a fluid outlet end;
- a rotor housed in the first duct section, the rotor comprising one or more rotor blades;
- a first vortex generator surface housed in the first duct section and on a respective one of the one or more rotor blades, the first vortex generator surface arranged to induce vortices in the fluid flow through the first duct section;
- and
- a second duct section defining a second direction through the second duct section from a fluid inlet end to a fluid outlet end, the second duct section comprising a second vortex generator surface, wherein the second vortex generator surface is arranged to induce vortices in the fluid flow through the first duct section.
(canceled)
A method of influencing fluid flow, the method comprising:
- providing a duct arrangement comprising a first duct section, a rotor, first vortex generator surface, and a second duct section including a second vortex generator surface, the first duct section arranged to receive a fluid flow therethrough, the rotor housed in the first duct section and including a rotor blade, the first vortex generator surface housed in the first duct section and on the rotor blade of the rotor, and the first and second vortex generator surfaces arranged to induce vortices in the fluid flow through the first duct section;
- generating vortices in a fluid flow using the first and second vortex generator surfaces;
- and
- receiving the fluid flow through the first and second duct sections.
A duct arrangement for generating vortices in a fluid flow to reduce a vorticity magnitude of a wake, the duct arrangement comprising:
- a first duct section arranged to receive a fluid flow therethrough, the first duct section defining a first direction through the first duct section from a fluid inlet end to a fluid outlet end;
- a rotor housed in the first duct section, the rotor comprising a rotor blade;
- a first vortex generator surface housed in the first duct section and provided on the rotor blade, the first vortex generator surface having projections which extend from a leading edge of the rotor blade, the first vortex generator surface arranged to induce vortices in the fluid flow through the first duct section;
- and
- a second duct section defining a second direction through the second duct section from a fluid inlet end to a fluid outlet end, the second duct section comprising a second vortex generator surface, wherein the second vortex generator surface is arranged to induce vortices in the fluid flow through the first duct section, the second duct section being provided upstream of the rotor along the first direction.
Dependencies are inferred from the claim text.