There is provided an aerosol generating system (101) for heating an aerosol-forming substrate (115). The aerosol generating system comprises an aerosol generating device (105) and a cartridge (103) with a storage portion (113) for storing the aerosol-forming substrate. The aerosol generating system comprises a vaporizer (119) for heating the aerosol-forming substrate to form an aerosol, at least one air inlet (123) and at least one air outlet (125). The air inlet (123) and the air outlet (125) are arranged so as to define an air flow route between the air inlet and the air outlet. The aerosol generating system further comprises flow control means for adjusting the size of the at least one air inlet (123), so as to control the airflow speed in the air flow route. The flow control means comprises: a first member and a second member, the first and second members cooperating to define the at least one air inlet. The first and second members are both contained in the cartridge and are arranged to rotate relative to one another so as to vary the size of the at least one air inlet.
展开▼
