The ornamental design for an aerosolgenerator, as shown and described.
FIG. 1 is a front perspective view of an aerosol generator incorporating our new design;
FIG. 2 is a rear perspective view of an aerosol generator;
FIG. 3 is a front bottom perspective view of an aerosol generator;
FIG. 4 is a rear bottom perspective view of an aerosol generator;
FIG. 5 is an enlarged top plan view of an aerosol generator;
FIG. 6 is an enlarged bottom plan view of an aerosol generator;
FIG. 7 is an enlarged right side view of an aerosol generator;
FIG. 8 is an enlarged left side view of an aerosol generator;
FIG. 9 is an enlarged rear view of an aerosol generator; and,
FIG. 10 is an enlarged front view of an aerosol generator.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.