标题：MATHEMATICAL ANALYSIS OF TRANSVERSE VIBRATION OF CONICAL SPIRAL TUBE BUNDLE WITH EXTERNAL FLUID FLOW
作者：Yan Ke; Ge Pei-qi; Su Yan-cai; Bi Wen-bo
作者机构：[Yan Ke; Ge Pei-qi; Su Yan-cai; Bi Wen-bo] Shandong Univ, Sch Mech Engn, Minist Educ, Key Lab High Efficiency & Clean Mech Mfg, Jinan 250061, Peoples 更多
通讯作者地址：[Ge, PQ]Shandong Univ, Sch Mech Engn, Minist Educ, Key Lab High Efficiency & Clean Mech Mfg, Jinan 250061, Peoples R China.
来源：JOURNAL OF HYDRODYNAMICS
关键词：conical spiral tube bundle; mathematical model; vibration; characteristic; FEM
摘要：The conical spiral tube bundle is a new type of heat transfer elements used to enhance heat transfer through flow-induced vibration. The effect of the external fluid flow on the transverse vibration of the conical spiral tube bundle is investigated with a mathematical method proposed in this article. Firstly, the natural vibration of the tube bundle is obtained by the hammering excitation method and the mode shapes of the transverse vibration are discussed. Then the effect of the external fluid flow on the transverse vibration of tube bundle is analyzed by a combination of experimental data, empirical correlations and FEM. The results show that in the frequency range from 0 Hz to 50 Hz, there exist six transverse vibrations. The external fluid flow has a significant effect on the frequency of the tube's transverse vibration, which are decreased by about 18% to 24% when the external fluid flow speed is 0.3 m/s.