Acoustic Resonance in Heat Exchanger Tube Bundles—Part II: Prediction and Suppression of Resonance

Abstract

In the first part of this series, experimental data were presented which suggest that the acoustic resonance in heat exchanger tube bundles is tied to periodic vortex shedding from the tubes. In this paper, a semi-empirical model for predicting the onset of resonance is developed. This model is compared with experimental data and other models from the literature. Methods of suppressing the resonance are developed and experimental data on their effectiveness are presented.

An in-Depth Study of Vortex Shedding, Acoustic Resonance and Turbulent Forces in Normal Triangle Tube Arrays

“…In fact, the first-mode component disappears altogether (see Figure 6(b)) and the SPL displays the characteristics of a forced response excited by the periodic source whose frequency ( f T ) changes linearly with the flow velocity. This contradicts the classical acoustic resonance behaviour in staggered arrays as reported in the literature Blevins & Bressler 1987a, 1987b. Secondly, the corresponding frequency distribution in Figure 6(a) indicates that a lock-in phenomenon does not exist in this case.…”

Effect of Arrangement of Tube Banks on Acoustic Resonance

“…It is considered that it is difficult to generate the acoustic resonance of low order mode for small tube pitch ratio. This is the similar tendencies with the charts of Blevins & Bressler [13,14]. On the other hand, the acoustic damping ratio of L/D = 1.44 for staggered arrangement agreed well with that of the in-line arrangement of L/D = 1.44.…”

“…Chen [6], Fitz-hugh [9] and Rae & Wharmby [10] have proposed Strouhal number charts for tube banks to estimate the vortex shedding frequency of a heat exchanger at the design stage. And Blevins & Bressler [13,14] have shown that the acoustic resonance of first transverse mode do not occur in the tube banks for small tube pitch ratio. However, the effect of arrangement in the tube banks on acoustic resonance was not clear in detail.…”

Study on acoustic natural frequency and its mode of one dimensional sound field partitioned by perforated plate

“…熱交換器のダクト内には管群(熱交換を行うため，温水や蒸気などを通す管の集合部)が存在する．この管群と ダクト内を流れるガスを接触させることで熱交換を行う．ガスを流すと，管群部にて風速に比例した周波数を有 するカルマン渦が生じ，その周波数が音速とダクト寸法で決定されるダクト内の気柱共鳴周波数の 60%～80%に 近づくと大音響の騒音が発生する(石原，2010)（Blevins，2001） ．この現象はロックイン現象と呼ばれよく知られ ている（石原，2004a，2004b） ． (Blevins and Bressler, 1987) (Blevins and Bressler, 1993 (Baird, 1954) (Cohan and Deane, 1965 …”