What question did this study set out to answer?

This research aims to analyze the effects of pitch ratio and support conditions on fluidelastic instability in tube arrays.

Fluidelastic instability in loosely supported rotated square tube arrays: Effect of pitch ratio and support conditions

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Experimental study investigates fluidelastic instability effects in tube arrays, indicating support conditions significantly impact stability.

This research aims to analyze the effects of pitch ratio and support conditions on fluidelastic instability in tube arrays.
Conducted experimental study on rotated square tube arrays subjected to air cross-flow.
Examined pitch ratios between 1.25 and 1.70 with tube-to-support radial clearances of 0.3, 0.5, and 0.7 mm.
Characterized the nonlinear dynamic response under varying support conditions.
Instability threshold increases with higher pitch ratios and tube-to-support clearances.
Identified a coupling mechanism between tubes as crucial for streamwise fluidelastic instability.
Validated findings with data from previous studies.

Elhelaly et al. (2026) studied this question.

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Experimental study investigates fluidelastic instability effects in tube arrays, indicating support conditions significantly impact stability.