Articles of The Transactions of KSRC

Settled flow of viscous fluid in the circular duct of the hydraulic skimmer

Full text article ( in russian)

Year	2017
Issue	380
Volume	2
Pages	42-48
Caption	Settled flow of viscous fluid in the circular duct of the hydraulic skimmer
Authors	Pavlovsky V.A., Tarovik V.I.
Keywords	current in the circular duct, viscosity, f–model, dynamic speed, Reynolds number, pressure gradient, differential equations, boundary conditions, speed profile, flow rate, resistance coefficient.
Summary	Object and purpose of research.The purpose of this work is to develop a physical & mathematical model for the hydraulic skimmer, an innovative vehicle currently under development, intended to recover the emergency spills of oil products contained under the ice. The skimmer will be connected with the technological system of the mother ship by a flexible coaxial line. The paper studies the parameter of the water flow, laminar and turbulent, in the circular duct serving to provide hot water into the axial duct so as to heat the oil products recovered by the skimmer. Subject matter and methodsThe work applies f–model of turbulence that allows settled flow calculation for a viscous incompressible fluid in the pipes and ducts with hydraulically smooth walls at both high and low Reynolds numbers. Main results.The first integrals (transcendental equations) have been obtained for the speed profile and the turbulence measure, which allows reducing this problem to a system of algebraic equations. The paper compares the calculation results for speed profiles and resistance coefficients versus the experimental data obtained by other authors. Conclusion. The results of the study allow making a theoretical justification for technical engineering and design solutions in developing the technological system to be installed aboard ship for recovery of the emergency spills of oil products under ice.
Rubrics	Naval architecture