Abstract
Wind tunnel experiments on the turbulent characteristics of a purely oscillatory flow were performed with the aids of the Laser Doppler anemometer as well as the hot wire anemometers, along with the advanced electronic data processing system.
The following results were obtained.
(i) Turbulence as predicted by the linear stability theory is triggered at the later stage of the acceleration period but it is suppressed at low level. While, with the beginning of the flow deceleration, turbulence is generated explosively near the wall and is propagated towards the central part of the duct.
(ii) Turbulent energy is almost completely dissipated within the decelerating period by strong turbulence, and thus the negative production can scarcely be expected.
(iii) The spectrum follows the steeper power law compared with the Kolmogorov spectrum.
(iv) The statistics of oscillatory flow remarkably differs from the steady turbulent flows.
[Correction] NAGARE Vol.1 No.3 (1982) pp.305d-305d
