The invention discloses an aeroacoustic wind tunnel corner
noise elimination flow deflector, a flow deflector group and a design method, and belongs to the technical field of aeroacoustic wind tunnel
test equipment. The corner flow deflector aims at solving the technical problems that an existing corner flow deflector cannot give consideration to aerodynamic performance and
noise elimination performance, and a special
shape design method and a combination application scheme are lacked. The
noise elimination flow deflector is of an integrated structure formed by sequentially connecting a semi-oval
front edge, a front straight section, an arc section, a rear straight section and a wedge-shaped
tail edge, and key parameters of the upper profile and the lower profile are designed in an associated mode. The flow deflector set is formed by combining and installing at least two
noise elimination flow deflectors according to a specific rule, and a uniform-section
airflow channel is formed. According to the design method,
coupling optimization of the
noise elimination amount and the aerodynamic performance is achieved through a parameterized
design process in combination with the Picrov formula, and the design method has the advantages of being high in
noise elimination efficiency, small in aerodynamic loss and good in
airflow uniformity, is suitable for a symmetric corner aerodynamic acoustic wind tunnel and can be widely applied to aerodynamic noise tests in the fields of
aviation, automobiles and the like.