An experimental study for the control of surge in a centrifugal compression system by using a bouncing ball was tried. The bouncing ball was placed on a hole outside of the upper wall of a plenum installed to a delivery of a compressor. The hole was surrounded by a tube and had the conical slope toward the hole. When surge occurred, the ball bounced by the fluctuating pressure force in an irregular manner.
By the irregular fluctuation of the bouncing ball, the frequency of surge was suppressed. The peak in the spectrum caused by surge disappeared. Thus, the simple method to control surge by using the bouncing ball was shown to be effective.