Hydrodynamic forces on partly buried, tandem twin pipelines in coexisting flow


Cokgor S. , Avci I.

JOURNAL OF COASTAL RESEARCH, ss.1783-1788, 2006 (SCI İndekslerine Giren Dergi) identifier

  • Basım Tarihi: 2006
  • Dergi Adı: JOURNAL OF COASTAL RESEARCH
  • Sayfa Sayıları: ss.1783-1788

Özet

This study deals with the forces under the coexisting flow on the circular cylinder, laid on, or partly buried in the bed with a parallel twin dummy cylinder nearby and without it. Forces were determined by measuring the pressure distribution on the cylinder. Force coefficients were obtained the current-to wave-velocity ratio, a, 0; 3; 6; and infinity (current) for coexisting flow. The forces also determined for the various burial-depth-to-the diameter ratio between 0-0.7 values of the cylinder. The dummy cylinder was replaced downstream and upstream of the measurement cylinder. The distance between measurement and dummy cylinders axis to diameter ratio was 2,1.5, 1. The results were indicated force coefficients reduce relatively by increasing burial depth and second cylinder beside the measurement cylinder also reduces the coefficients according to the single cylinder on the bed except the gap between the cylinders are half of diameter. In this case force coefficients were taken the values close the single cylinder in the flow.