Rotary spray device and method of spraying coating product using such a rotary spray device

A rotary spray device for coating product, comprising:

• a coating product spray member having at least one roughly circular edge and able to form a jet of coating product,
• means for driving the rotation of the spray member, and
• a body which is fixed and which comprises:
• primary orifices arranged on a primary contour surrounding the axis of rotation of the spray member, each primary orifice being intended to eject a jet of primary air in a primary direction,
• secondary orifices arranged on a secondary contour surrounding the axis of rotation of the spray member, each secondary orifice being intended to eject a jet of secondary air in a secondary direction,
• wherein the respective orientations of each primary direction and of each secondary direction and the respective positions of each primary orifice and of each secondary orifice cause the formation of combined jets each resulting from the intersection of at least one jet of primary air and at least one jet of secondary air which are associated with one another, the region of intersection lying upstream of the edge.