Static air mixing apparatus

A method of mixing airstreams of different temperatures flowing through a common duct having walls defining a passageway, said method comprising the steps of:

• positioning a plurality of vanes transversely in the duct with respect to a direction of the airstreams flowing therethrough, said plurality of vanes diverging away from a center of said duct and terminating at their outer distal ends adjacent said duct;
• arranging at least one vane of said plurality of vanes to include an inner section curving rearwardly in a first direction, and an outer section connected to said inner section, said outer section curving rearwardly in a second direction, and said inner and outer sections having a common leading edge;
• providing a flow of the airstreams through said plurality of vanes;
• and
• creating an interface vortex circulating near a junction between the inner and outer sections, said interface vortex contributing to mixture of the airstreams.

A method of mixing airstreams of different temperatures flowing through a common duct having walls defining a passageway, said method comprising the steps of:

• positioning a plurality of vanes transversely in the duct with respect to a direction of airstreams flowing therethrough, said plurality of vanes diverging away from a center of said duct;
• arranging at least one vane of said plurality of vanes to include an inner section curving rearwardly in a first direction, an outer section adjacent said inner section and curving rearwardly in a second direction, said at least one vane being constructed of a single piece of material;
• providing a flow of the airstream through said plurality of vanes;
• and
• creating an interface vortex circulating near a junction between the inner and outer sections, said interface vortex contributing to mixture of the airstreams.

A method of mixing airstreams of different temperatures flowing through a common duct having walls defining a passageway, said method comprising the steps of:

• positioning a plurality of vanes transversely in the duct with respect to a direction of airstreams flowing therethrough, said plurality of vanes diverging away from a center of said duct;
• arranging at least one vane of said plurality of vanes to include an inner section curving rearwardly in a first direction, an outer section adjacent said inner section and curving rearwardly in a second direction, said inner section and said outer section sharing a common leading radial edge;
• providing a flow of the airstream through said plurality of vanes;
• and
• creating a plurality of vortices, said plurality of vortices including an interface vortex circulating near a junction between the inner and outer sections, and a clip angle vortex circulating near said inner section, said interface vortex and said clip angle vortex contributing to a mixture of airstreams.

A static air mixing apparatus adapted for intermixing air streams of different temperatures flowing through a common duct having walls defining a passageway, said apparatus comprising:

• a plate transversely mounted in the duct;
• a plurality of vanes and flaps formed from said plate by cutting the plate to form the vanes and flaps, each of the vanes and flaps having a leading edge attached to said plate, and said vanes and flaps being bent in a downstream direction;
• said vanes extending radially outward from a center of the duct, and each vane having an inclined edge defining a clip angle;
• and
• said flaps being positioned radially outward from said vanes.

A method of mixing airstreams of different temperatures flowing through a common duct having walls defining a passageway, said method comprising the steps of:

• positioning a plate transversely in the duct with respect to a direction of airstreams flowing therethrough;
• cutting said plate to form a plurality of vanes which extend radially outward from a center of the plate;
• further cutting the plate to form a plurality of flaps which surround said plurality of inner vanes, said flaps and said vanes being bent downstream a desired angle;
• providing a flow of the airstream through said plurality of vanes and flaps;
• and
• creating a plurality of vortices circulating downstream of said vanes and flaps, said vortices contributing to mixture of the airstreams.