摘要
管束振动的诱导与控制是弹性管束换热器在一定疲劳寿命前提下实现强化换热的重要保证。设计锥螺旋弹性管束和脉动流发生装置并对考虑流固耦合情况下锥螺旋管束的固有模态进行研究;通过谐响应分析,得到锥螺旋管束的频率响应;通过仿真分析脉动流发生装置中绕流体纵向尺寸对各分支管脉动流的影响,确定了工况流速下的绕流体纵向尺寸。结果表明:锥螺旋管束在流固耦合作用下固有频率有所下降;在相同入口流速条件下,随着绕流体纵向尺寸增大,脉动流发生装置同一分支管脉动流强度先增大后减小,而其频率先减小后增大。研究工作对锥螺旋弹性管束换热器设计具有重要意义。
The induction and control of tube bundle vibration is an important guarantee for heat transfer enhancement of the elastic tube bundle in heat exchanger under the premise of a certain fatigue life. The design of a conical spiral elastic tube bundle and a pulsating flow generating device is presented, and the natural modals of the fluid-solid coupled conical spiral tube bundle are studied. Through the harmonic response analysis of the conical spiral tube bundle, the frequency response of the tube bundle is obtained. In addition, the influence of the longitudinal dimension of pulsating elements on pulsating flow of each branch tube in the pulsating flow generating device is simulated and analyzed. Then the longitudinal dimension under a certain working condition is determined. The results show that the natural frequency of conical spiral tube bundle decreases under the influence of fluid-solid coupling;At the same inlet flow velocity, pulsating flow intensity of the same branch tube in the pulsating flow generating device increases first and then decreases as longitudinal dimension of the pulsating element increases, while the frequency decreases first and then increases. The research work is of great significance to the design of conical spiral elastic tube bundles of heat exchangers.
作者
王德京
葛培琪
毕文波
WANG Dejing;GE Peiqi;BI Wenbo(School of Mechanical Engineering, Shandong University, Jinan 250061, China;Key Laboratory of High-efficiency and Clean Mechanical Manufacture, Ministry of Education,Shandong University, Jinan 250061, China)
出处
《噪声与振动控制》
CSCD
2019年第4期59-63,119,共6页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51475268)
关键词
振动与波
锥螺旋弹性管束
固有模态
绕流体
脉动流发生装置
vibration and wave
conical spiral elastic tube bundle
natural modal
pulsating element
pulsating flow generating device
