Heat generation apparatus for an aerosol-generation system of a smoking article, and associated smoking article

An elongate smoking article having a lighting end and an opposed mouth end, said smoking article comprising:

• a mouth end portion disposed at the mouth end;
• a tobacco portion disposed between the lighting end and the mouth end portion;
• and
• an aerosol-generation system disposed between the lighting end and the tobacco portion, the aerosol-generation system including a heat generation portion disposed at the lighting end, the heat generation portion comprising an elongate fluted member configured to be actuated by ignition of the lighting end, the fluted member consisting of a monolithic extrusion of a single carbonaceous material and defining a plurality of grooves extending longitudinally between opposed first and second ends, the first end being disposed at the lighting end and the grooves being equidistantly spaced apart about the fluted member, each groove having a maximum depth, with the depth maxima of the grooves defining a circle having a radius, the maximum depth of each groove being no more than the radius of the circle;
• wherein each groove is at least partially defined by opposing side walls, and each side wall intersects an outer periphery of the fluted member, and wherein the fluted member defines eight grooves equidistantly spaced apart about the fluted member, the depth maxima of each groove being arcuate and having a diameter of about 0.0220 inches and the intersection of a side wall of each groove with the outer periphery of the fluted member having a corner radii of about 0.0050 inches.