湍流边界层的猝发频率

BURSTING FREQUENCY IN TURBULENT BOUNDARY LAYERS

Employing laser Doppler anemometry and VITA technique, the bursting frequency in turbulent boundary laryers has been measured over the Reynolds-number range 320-1470. The result indicates that when the average bursting frequency is scaled with the variables appropprite for the wall region, the non-dimensional frequency is constant and independent of Reynolds number. When the same duta are plotted using the .cuter vatiables of boundary layer to normalize the bursting frequency, it indicats that the non-dimensional frequency increases as the Reynolds number increases. This is in agreement with the results of Blackwelder et al. (1983) who used hot wire anemometry and VITA technique.