Inhaler article with open distal end, and inhaler system

An inhaler article for use in an inhaler system for delivering a dry powder to the lungs of a user of the inhaler system, the inhaler article comprising:

• a body extending along a longitudinal axis of the inhaler article from a mouthpiece end to a distal upstream end;
• a capsule cavity defined within the body and bounded downstream by a filter element and bounded upstream by a tubular element defining a central passage in fluid communication with the capsule cavity, the central passage forms an air inlet aperture extending along the longitudinal axis of the inhaler article and from the distal end of the body to the capsule cavity, wherein the tubular element has a central passage inner diameter in a range from about 70% to about 90% of an inner diameter of the capsule cavity, wherein the tubular element extends from a first end defining an upstream boundary of the capsule cavity to a second opposing end defining the distal end of the inhaler article body;
• a capsule disposed within the capsule cavity, the capsule containing the dry powder;
• and a membrane fixed to the second opposing end of the tubular element;
• wherein the inhaler article is configured to receive a swirling inhalation airflow into the central passage.