吴九汇西安交通大学教师主页管理系统 AERODYNAMICS AND AEROACOUSTICS OF AIRFLOW OVER A HUMAN HEAD 中文主页

AERODYNAMICS AND AEROACOUSTICS OF AIRFLOW OVER A HUMAN HEAD

发布时间：2025-04-30

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摘要：: Airflow should be affected by ear, nose, etc, and aerodynamic sound could be brought when the
human head and the airflow occurs at a relative speed movement. Because the drag force of the
head is large, in cycling competitions and other high-speed sport the diversion hats should be
worn. After the speed of airflow reaches to a certain speed, due to the strong airflow interference,
the aerodynamic noise could be brought and it could greatly impact on the athletes to
make action decisions. In this paper, computational fluid dynamics (CFD) method is used for
solving the aerodynamic behavior of a human head under different air velocities, and the
pressure on head surface and the airflow around the head are calculated. Then, the abovementioned
conditions of different aerodynamic sound are solved by the finite element/infinite
element method (FEM/IFEM), the points in the canal entrance of the two ears are picked up
for collecting the SPL spectral curves, and the sound distribution of the horizontal plane and
the median plane are drawn. Previous studies showed that the aerodynamic noise brought by
head spoiler is obvious at low frequencies, because the influence of the head, if the airflow speed
is greater than a certain value, the aerodynamic noise could not only increase, but also should
be substantially reduced. The results are useful for athlete diversion cap design and spatial
hearing research in which the influence of the airflow should be considered.