... simulation hydroturbine pipe flow interaction point tracking method In hydro-electric power systems, the running security and efficiency depend greatly on the hydroturbine conditions. Especially, the stability of the hydraulic head at the two sides of the turbines keeps them running...

... modes Frequency of the in-plane modes of the U-tube for different support conditions (12.7 mm tube) bars boilers design engineering dynamic response elasticity flow instability flow measurement heat transfer mechanical testing numerical analysis pipe flow pipes turbulence...

... numerical analysis pipe flow pipes telemetry turbulence vibrations Flow-induced vibrations of heat-exchanger tube bundles and nuclear fuel rods are a major source of concern, when component life and plant availability are addressed. Excitation by the flow turbulence and possible fluid-elastic...

... of the pipeline. The general pattern for the shape of the assumed velocity profile is given in Fig. 3 for steady, uniform, turbulent pipe flow in curved pipes, as investigated first by Prandtl ( 10 11 ) and Schlichting ( 12 ). Here, it was assumed...

... and contradictions between analytical predictions and experimental measurements regarding the conditions of these pipes. 20 11 2009 12 01 2010 28 02 2011 28 02 2011 bars dynamic response flow instability heat exchangers pipe flow pipes two-phase flow vibration control wear...

... [ t ( D f − D b ) + p D b ] where p is the fin pitch, t is the fin thickness, D f is the fin diameter, and D b is the bare tube diameter. flow instability heat exchangers pipe flow pipes turbulence vibrations vortices wear...

... pipe flow wind tunnels Nuclear steam generator tubes subjected to cross-flow have worn through and failed due to oscillatory contacts with adjacent tubes or flat bar supports sometimes called “antivibration bars” or AVBs. Fatigue failure of tubes at locations where they are effectively clamped...

.... Various parameters were used in those formulations, including the dominant parameter M Δ p where M is the Mach number of the crossflow through the tube bank and Δ p is the pressure drop through the tube bank. acoustic resonance boilers heat exchangers pipe flow pipes...

... computational fluid dynamics damping elasticity Navier-Stokes equations numerical analysis pipe flow turbulence Flow induced vibration (FIV) is a major concern while operating shell and tube heat exchangers. Tube vibrations are due to forces generated by vortex shedding, turbulence...

... and eigenfunctions fatigue friction gas industry petroleum industry pipe flow pipes vibrations vortices Gas flowing within a pipe, which has internal corrugations, may generate large noise levels. The noise is of concern to the oil and gas industry because it may be of sufficient amplitude to cause...

... with the R16.5 geometry. 20 10 2009 08 03 2010 21 07 2010 21 07 2010 bending flow measurement pipe flow pipes two-phase flow vibrations multiphase flow flow structure interaction Flow-induced vibrations frequently occur in industry and pose problems in many...

... cantilevers carbon nanotubes elastic waves impact (mechanical) mechanical stability pipe flow pipes two-phase flow vibrations wear In oil and gas installations, whether on-shore or off-shore, pipes are commonly used for the conveyance of either crude or products. In either case, the pipes...

... of the predictive techniques achieved through laboratory experiments ( 8 9 10 11 ). impact (mechanical) mechanical contact modal analysis pipe flow supports transducers turbulence vibration measurement vibrations 15 06 2009 16 12 2009 05 05 2010 2010 American Society...

... 29 01 2010 elastic waves impact (mechanical) liquid waves pipe flow projectiles Impulsive loading and the resulting fluid-structure interaction (FSI) has been extensively studied since WWII ( 1 2 ). The classical configuration in these experiments is a flat plate with loading...

... 2009 26 01 2010 26 01 2010 computational fluid dynamics heat transfer pipe flow stratified flow computational fluid dynamics (CFD) thermally stratified flow thermal stratification conjugate heat transfer pressurized water reactor (PWR) pressurizer surgeline...

... computational fluid dynamics corrosion electrochemistry failure (mechanical) film flow flow simulation microfluidics multiphase flow pipe flow pipes surface cracks turbulence wear corrosion dynamic simulation multiphase flow protective films modeling fluid-structure interaction...

... 0301-9322 , 11 , pp. 161 – 175 . 10.1016/0301-9322(85)90043-6 24 07 2008 25 02 2009 02 09 2009 damping flow instability heat exchangers pipe flow pipes refrigerants turbulence two-phase flow vibrations Two-phase cross flow exists in approximately half...

... flow visualisation fluid oscillations pipe flow pipes shear flow The excitation of acoustic resonances by the coupling of a sound field and an unsteady separated fluid flow is a well-recognized problem in industrial piping systems. Acoustic resonances can produce unacceptable noise levels...

... accelerometers elasticity flow instability pipe flow two-phase flow The U-bend region of nuclear steam generator tubes, which undergoes high velocity two-phase cross-flow, is highly susceptible to flow-induced vibrations. Fluid-elastic instability can cause a fretting wear of U-tubes in a short time...

... and the intensity of the precoincidence resonance are therefore strongly dependent on the diameter of the cylinders. 15 04 2007 03 09 2007 30 12 2008 acoustic resonance pipe flow vortices tandem cylinders vortex shedding acoustic resonance flow-acoustic interaction...