Avoiding leakage flow-induced vibration by a tube-in-tube slip joint

Conference · Tue Jan 01 00:00:00 EST 1985

OSTI ID:5450736

Mulcahy, T M

Parameters and operating conditions (a stability map) were determined for which a specific slip-joint design did not cause self-excited lateral vibration of the two cantilevered, telescoping tubes forming the joint. The joint design featured a localized annular constriction. Flowrate, modal damping, tube engagement length, and eccentric positioning were among the parameters tested. Interestingly, all self-excited vibrations could be avoided by following a simple design rule: place constrictions only at the downstream end of the annular region between the tubes. Also, overall modal damping decreased with increased flowrate, at least initially, for upstream constrictions while the damping increased for downstream constrictions.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5450736
• Report Number(s): CONF-850926-2; ON: DE85006228
• Resource Relation: Conference: ASME vibration and sound conference, Cincinnati, OH, USA, 10 Sep 1985
• Country of Publication: United States
• Language: English

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