螺旋管束流体弹性不稳定的解析模型

The theoretical model on the stability of helical tube bundles

本文根据螺旋管束流动诱发振动的实验研究结果，及冲刷螺旋管阵流场的观测结果，提出了一种螺旋管束流体弹性不稳定的解析模型，获得了螺旋管束流体弹性不稳定分析所需的流体力系数，给出了螺旋管束拽力方向静力不稳定分析的解析表达式。解析模型与实验结果符合良好。

Based on generous experimental results which included the study of flow induced belieal tube vibration, and the photographic study for fluid flow between banks of stright tubes and belieal tubes, this paper developes a theoretical model for nuid elastic instability in belieal tube bundles; obtains the fund force which is very important for analyzing fluid elastic instability of belieal tube bundles, and shows a theoretical correlation which would calculate the crititcal flow velocity of the static instability in the streamwise direction for belieal tube. Comparing with experimental results, the theoretical correlation has a good agreement with it.