脉动流发生装置诱导弹性管束振动的实验研究

Tests for pulsating flow generator-induced vibration of elastic tube bundle

为了实现对换热器内弹性管束振动的有效激发和控制,提出了一种新型脉动流发生装置,搭建了脉动流诱导弹性管束振动测试实验台,测试了换热器内各排弹性管束在不同工况下的振动响应。结果表明:在脉动流发生装置诱导下,弹性管束主要有两个振动频率,一个频率基本不受入口流速的影响,另一个频率随入口流速的增加而增加;提出的脉动流发生装置,一方面使弹性管束的振动强度明显增加,另一方面在一定程度上解决了各排弹性管束振动不均的问题。

In order to realize effective exciting and control of elastic tube bundle vibration in heat exchanger,a new pulsating flow generator was proposed,the test platform of pulsating flow-induced elastic tube bundle vibration was built,and vibration responses of elastic tube bundles in heat exchanger were measured under different working conditions.The results showed that under the inducement of pulsating flow generator,elastic tube bundle mainly has two vibration frequencies,one frequency is basically not affected by inlet flow rate,the other one increases with increase in inlet flow rate;on the one hand,the proposed pulsating flow generator makes vibration intensity of elastic tube bundle increase obviously,on the other hand,the uneven vibration problem of elastic tube bundles is solved to a certain extent.