...Junyu Tao; Zhe Lin; Guang Zhang; Jingpan Su; Zuchao Zhu This research took the DN50 butterfly valve as the research object and studied the flow situation of butterfly valves with different shafts. The resistance characteristics, flow state, characteristics, and flow instability of butterfly valves...

... for the blade tip with surface roughness. This positive alteration in the tip leakage flow structure led to the improved performance for the blade tip with surface roughness. axial compressor flow instability stall margin tip clearance performance characteristics Turbomachines are the machines...

... forces and their consequences on the stability of axial inducers. 24 08 2011 06 10 2011 19 12 2011 19 12 2011 blades cavitation flow instability pumps rotors Rotordynamic forces, together with flow instabilities generated or not by cavitation, are one...

.... 24 08 2011 06 10 2011 11 11 2011 11 11 2011 bubbles cavitation flow instability pumps rockets two-phase flow The noncavitating performance of a pump is substantially not affected by the properties of the working fluid in conditions of fully developed turbulent...

... to a modest increase in the average vortex core radius, which was discernable in the measured pressure needed for developed cavitation. 24 12 2010 07 09 2011 27 10 2011 27 10 2011 cavitation flow instability flow visualisation non-Newtonian flow polymer solutions pressure...

... approximately equals the exit diameter of the supersonic nozzle. 05 01 2011 22 08 2011 24 10 2011 24 10 2011 blades compressible flow confined flow flow instability flow visualisation impellers nozzles rotors shear turbulence stratified flow supersonic flow Pressure...

... Frames of Reference ,” In IChemE Symposium Series , 136 , pp. 549 – 556 . air computational fluid dynamics flow instability flow simulation fluctuations impellers mesh generation pipe flow pumps reservoirs turbulence vortices transient flow radial flow pump stopping period...

... operation. 30 11 2010 09 09 2011 05 10 2011 05 10 2011 cavitation flow instability impellers pumps rockets rotational flow rotors Rotordynamic forces, together with flow instabilities generated or not by cavitation, are one of the universally recognized and most...

... 09 2011 27 09 2011 chaos flow instability flow simulation non-Newtonian flow numerical analysis polymer melts shear turbulence stagnation flow vortices wakes It is well-established that the injection of dilute solutions of polymers into turbulent flows produces large...

... amplitudes graphs. The results are discussed in the context of potential oscillations and coupling mechanisms including the effect of the precessing vortex core (PVC), recirculation and shear flow instabilities. Swirl flow combustors and swirl stabilized combustion are extremely common in industry...

...Andreas Lucius; Gunther Brenner Flow instabilities like rotating stall can lead to severe vibrations in turbomachines if the eigenfrequency of the rotor is equal to the stall frequency. The goal of the present work is to shed some light on the origin of the rotating stall phenomenon...

... aerodynamics flow instability shapes (structures) turbulence vortices wakes wind tunnels Surface pressure distributions in the SLW configuration. The data from Okamoto and Takeuchi [( 12 )] pertains to Re d  = 32,200 and B  = 4.2%. Note the uncertainty is accommodated by the size...

... modes for a plane Poiseuille flow at α = 1.0 and Re = 10,000 beams (structures) boundary layers flexible structures flow instability shear flow Young's modulus Many engineering problems are multidisciplinary in nature and in the past they could not be solved numerically due to our...

... 07 2011 flow instability pipe flow viscosity The dynamics of fluid flows with temperature-dependent properties have been the subject of numerous experimental, theoretical, and numerical studies due to their relevance to practical applications; these include lubrication, tribology...

.... , Brennen C. E. , 2001 , “ Unified Treatment of Flow Instabilities ,” J. Propul. Power , 17 ( 3 ), pp. 636 – 643 . 10.2514/2.5790 24 Lohrberg H. , Stoffel B. , Fortes-Patella R. , Coutier-Delgosha O. , and Reboud J. L. , 2002 , “ Numerical and Experimental...

... cavitation flow instability fluid oscillations rotational flow synchronisation thermodynamics thermodynamic effect cavitating inducer rotating cavitation surge mode oscillation Example of estimated cavity region obtained from measured pressure distribution under normal cavitation...

.... Aerodyn. , 91 ( 5 ), pp. 653 – 669 . 10.1016/S0167-6105(02)00459-2 flow control flow instability flow visualisation turbulence two-phase flow mean flow asymmetry bistability unstable double backward facing step Buildings as well as vehicles on ground and sea are often bluff...

... a rapid rise at relatively small incidence angles [ 14 ]. anemometry boundary layer turbulence drag reduction external flows flow control flow instability flow separation flow visualisation pressure measurement rods (structures) vibrations vortices wakes Distributions...

... passages. This stationary vortex formation is associated with a total pressure rise over the machine and leads to the slope change of the characteristic. Rotating stall is a flow instability which extends from the runner, the vaneless space to the guide and the stay vane channels at large guide vane...

... fluctuation between the calculation and experiment reached 20%, which might be acceptable by usual engineering applications. 19 07 2010 03 01 2011 28 01 2011 28 01 2011 blades cavitation flow instability flow simulation mass transfer numerical analysis propellers turbulence...