Heat exchanger with tube core, in particular for a supercharged internal combustion engine

Heat exchanger (14), especially type air-air, for an engine (12) charged combustion engine, of the type comprising at least a first manifold (16) and a second manifold (18) which are linked by a beam (20) of horizontal tubes through which I circulates an inner airflow (Fi) to be cooled by a flow (Fe) of cooling fluid circulates outside the tubes of the bundle (20), characterized in that the beam (20) of tubes comprises at least: - a first part (P1) comprising a first series of tubes (S1P1) with turbulators (34) having a total cross section of passage (S11) and a second series of tubes without turbulators (S2P1) having a total cross section of step (S12) globally equivalent to the total passage section (S11), - a second part (P2) comprising a first series of tubes without turbulators (S1P2) having a section total step (S21) and a second series of tubes (S2P2) with turbulators (34) show a total passage section (S22) globally equivalent to the total passage section (S21) - and a box of distribution (24 ) of the inner airflow (Fi) to be cooled, comprising connecting means (40) of the output of the first series of tubes with turbulators (S1P1) in the first part (P1) with the inlet of the first series of tubes without turbulators (S1P2) the second part (P2) and joining the outlet of the second series of tubes without turbulators (S2P1) the first part (P1) with the input of the second series of tubes with turbulators ( S2P2) of the second part (P2).