The construction of increasingly higher buildings combined to aesthetic design of facade raise many questions about the wind noise generated by facade elements. Different kind of elements such as sun screens, gratings, lattices, perforated plates or tube networks can be attached or integrated to building's facades. Some measurements methods in wind tunnel or in coupled room exist but few data is available about large facade elements. Moreover, it is difficult to predict if the shape or the materials used will be generating noise without reference measured data, especially for complex geometries. In this paper, a simple measurement method is proposed in a non-acoustic wind tunnel to test prototypes between 1 and 2 m~2. In a first step, experimental results about simple and idealized samples provide interesting information about appearance of main physical phenomena. Then, real facade elements were measured with a more complex geometry. The empirical observations performed provide conception rules or guidelines to minimize noise generated by wind on facade elements. Also, it is possible to determine occurrences of the aero-acoustic phenomena observed in a wind tunnel with a complementary study concerning wind conditions on the location of the building.
展开▼
