In this paper, after theoretical considerations, two ventilation openings are analysed : an opening with top-hinged flap and a wall inlet with central flap. The analysis shows that it is possible to split artificial resistance coefficients from literature into pure resistance and pure contraction coefficients .
Friction and contraction by ventilation openings with movable flaps
![](https://www.aivc.org/sites/default/files/default_images/default_image_5.png)
Year:
2002
Bibliographic info:
Proceedings of Room Vent 2002 (8th International Conference on Air Distribution in Rooms) - 8-11 september 2002 - Moltke's palace, Copenhagen - Denmark - pp 585-588, 2 Fig., 4 Tab., 5 ref.