Numerical investigation of flow field around a mannequin model with airway system in an air conditioned room
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:

In this study, flow field around a mannequin with an attached respiratory system inside a room including air condition dampers was analyzed numerically. The computational domain includes the regions around the mannequin and the airway from the nostril inlet to trachea. The room is ventilated by air conditioning system, which in the first mode the dampers were installed on the front wall and in the second mode they were installed on the right side wall. The flow field was evaluated by solving the Navier-stokes and continuity equations in steady state condition by means of k-ω SST Transition model in the Ansys-Fluent software. The inhalation rates of 15, 20 and 30 lit/min were simulated. Pressure, shear stress and turbulence intensity distributions from nostril inlet to trachea were computed and flow streamlines and pressure distributions in various sections at nasal cavity, glottis and trachea were analyzed. Velocity distribution and streamlines in front of the mannequin face in the room were studied and the air velocity distribution in the vicinity of the mannequin face was compared with the comfort condition. Distribution of turbulence intensity indicates turbulent air flow regime in the respiratory system and according to the results location of air condition dampers did not affect the turbulence intensity distribution inside the respiratory system. In addition, in the second mode lower air velocity was obtained around the mannequin face and better comfort was maintained.

Language:
Persian
Published:
Amirkabir Journal Mechanical Engineering, Volume:52 Issue: 4, 2020
Pages:
131 to 140
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