Dynamics of tubes in fluid with tube-baffle interaction

Abstract

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Chaotic dynamics of loosely supported tubes in crossflow

“…8 we see that the results from the simulation by the bilinear fluidelastic model agree reasonably well with the experimental data of Chen et al 1 We also note that in Fig. 8, flow velocity in both experiment and simulation is up to 3 m/s because once flow velocity exceeds some values, a TSP-active mode becomes unstable and other nonlinear effects become important.…”

“…14. Figure 14a shows the PSD of tube displacement at Um = 1.8 m/s, which appears to be periodic with superharmonic components, f/f 1 1, 3, 5, .... This is caused by tube impacting (see Fig.…”

Experiment on fluidelastic instability of loosely supported tube arrays in crossflow

“…A section of this shell is fitted with two vertical pipe branches that accommodate a test assembly. The details of the test chamber are the same as those in earlier experiments for tube arrays in crossflow (Chen, Jendrzejczyk, and Wambsganss 1985). The overhung portion (the portion outside the tube supports A and D) for tubes 1, 2, 4, and 5 is 3.81 cm (1.5 in.…”

“…Since the publication of a systematic experiment of tube arrays in crossflow with loose supports (Chen, Jendrzejczyk, and Wambsganss 1985), many tests have been performed to understand this interesting and important problem. Some experiments were directed to the general tube response to a specific excitation and characterization of the tube/support interaction and wear (Haslinger et al 1987, 1989; Fisher and Ingham 1988;Ko and Magel 1989;Fisher et al 198$;Goyder 1985).…”

A Simulation of the Turbulence Response of Heat Exchanger Tubes in Lattice-Bar Supports

“…Many experimental investigations have been conducted to study the nonlinear tube response and to characterize tube wear [see, for example, Weaver & Schneider (1983), Chen et al (1985), Haslinger et al (1987), Antunes et al (1990b), Taylor et al (1995)]. Additionally, numerical investigations utilizing the finite element method have been conducted to simulate the nonlinear tube response.…”