Random excitation forces in tube bundles subjected to two-phase cross-flow

Journal Article · Thu Aug 01 04:00:00 EDT 1996 · Journal of Pressure Vessel Technology

DOI:https://doi.org/10.1115/1.2842189· OSTI ID:390210

Taylor, C E; Pettigrew, M J ^[1]; Currie, I G ^[2]

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1. AECL Research, Chalk River, Ontario (Canada). Chalk River Labs.
2. Univ. of Toronto, Ontario (Canada). Dept. of Mechanical Engineering

Data from two experimental programs have been analyzed to determine the characteristics of the random excitation forces associated with two-phase cross-flow in tube bundles. Large-scale air-water flow loops in France and Canada were used to generate the data. Tests were carried out on cantilevered, clamped-pinned, and clamped-clamped tubes in normal-square, parallel-triangular, and normal-triangular configurations. Either strain gages or force transducers were used to measure the vibration response of a centrally located tube as the tue array was subjected to a wide range of void fractions and flow rates. Power spectra were analyzed to determine the effect of parameters such as tube diameter, frequency, flow rate, void fraction, and flow regime on the random excitation forces. Normalized expressions for the excitation force power spectra were found to be flow-regime dependent. In the churn flow regime, flow rate and void fraction had very little effect on the magnitude of the excitation forces. In the bubble-plug flow regime, the excitation forces increased rapidly with flow rate and void fraction.

• Sponsoring Organization: USDOE
• OSTI ID: 390210
• Journal Information: Journal of Pressure Vessel Technology, Journal Name: Journal of Pressure Vessel Technology Journal Issue: 3 Vol. 118; ISSN 0094-9930; ISSN JPVTAS
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CROSSFLOW SYSTEMS
DATA ANALYSIS
FLUID-STRUCTURE INTERACTIONS
HEAT EXCHANGERS
MECHANICAL VIBRATIONS
TWO-PHASE FLOW