An experimental study of the effect of tube-to-tube ties on fluidelastic instability in an in-line tube array

摘要

An experimental study was conducted on the effect of tube-to-tube ties on the fluidelastic instability of an in-line tube array with a streamwise pitch ratio of 1.33 and a transverse pitch ratio of 2.0. Various arrangements of tubes clamped in the streamwise direction were examined. The results showed that clipping two tubes together had a stabilizing effect but also exhibited substantial hysteresis. On the other hand, longitudinal clipping of 3,4 or 6 tubes together increased the fluidelastic stability threshold by a factor of more than 3.