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.
Claims18
A duct arrangement for influencing a liquid flow, the duct arrangement comprising:
- a first duct section arranged to receive the liquid flow therethrough, the first duct section defining a first direction through the first duct section from a liquid inlet end to a liquid 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 having projections which extend from a leading edge of the one or more rotor blades in a continuous wave-like profile, the first vortex generator surface arranged to induce vortices in the liquid flow through the first duct section;
- and
- a second duct section defining a second direction through the second duct section from a liquid inlet end to a liquid outlet end, the second duct section comprising a second vortex generator surface at the liquid inlet end having curved projections in a direction opposite to the first direction forming a continuous surface with a leading edge of the second duct section having a wave-like profile, wherein the second vortex generator surface is arranged to induce vortices in the liquid flow downstream through the first duct section.
A method of influencing a liquid 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 the liquid 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, the first vortex generator surface having projections which extend from a leading edge of the rotor blade in a continuous wave-like profile, the second vortex generator surface having curved projections forming a continuous surface with a leading edge of the second duct section having a wave-like profile, and the first and second vortex generator surfaces arranged to induce vortices in the liquid flow downstream through the first duct section;
- generating vortices in the liquid flow using the first and second vortex generator surfaces;
- and
- receiving the liquid flow through the first and second duct sections.
A duct arrangement for generating vortices in a liquid flow to reduce a vorticity magnitude of a wake, the duct arrangement comprising:
- a first duct section arranged to receive the liquid flow therethrough, the first duct section defining a first direction through the first duct section from a liquid inlet end to a liquid 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 in a continuous wave-like profile, the first vortex generator surface arranged to induce vortices in the liquid flow through the first duct section;
- and
- a second duct section defining a second direction through the second duct section from a liquid inlet end to a liquid outlet end, the second duct section comprising a second vortex generator surface at the liquid inlet end, wherein the second vortex generator surface has curved projections in a direction opposite to the first direction forming a continuous surface with a leading edge of the second duct section having a wave-like profile arranged to induce vortices in the liquid flow downstream 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.