[PDF] Top 20 Experimental Study of Orifice-Induced Pressure Fluctuation and Pipe Vibration

... and orifice hole ratio (the ratio of orifice hole diameter and pipe inner diameter) of ...Furthermore, fluctuation pressure and acceleration data have also been collected for the test ... See full document

... predicted pressure loss coefficient for a square-edged orifice ...the orifice. They concluded that the position of the orifice does not affect the onset of flooding ...an experimental ... See full document

... Overall, the most complicated phenomenon among all the internal two-phase flows in a pipeline is the slug flow. The major reason being it’s associated local fluctuations of phase, i.e. intrinsically unstable. Apart from ... See full document

... An orifice is used widely as a flow meter or a contraction device in pipeline systems in hydro- power plants, thermal power plants, and chemical plants because of its simple construction, high reliability, and low ... See full document

... called orifice-cavity-orifice nozzle was proposed for generation of the self-sustained acoustic oscillations by Abell and Luxton ...a pipe, orifice, resonance cavity and finally issues through ... See full document

... of pressure fluctuating under different load, the results indicate that the pressure fluctuation conditions in draft tube are not same under different load, the corresponding fractal correlation ... See full document

... Experiments have been carried out in the Circulating Water Channel of the NDF (Fluids and Dynamics Research Group) at the University of S˜ao Paulo, Brazil. The NDF-USP water channel has an open test section 0.7m wide, ... See full document

... a study on loosening of threaded fasteners subjected to dynamic shear ...identified. Experimental results illustrating these loosening processes are ...constrained vibration problem that is ... See full document

... IOP fluctuation range and high maximum IOP levels may be contributory factors in PEX ...IOP fluctuation. Examination of IOP fluctuation with the CLS may become a useful tool for glaucoma ... See full document

... the pressure gain drops and the phase delay increases with increasing frequency irre- spective of what the restriction ...the experimental data are in agreement with the simulation results when the in- put ... See full document

... An electronic dynamic smart shaker (Modal number K2007E01) from Modalshop Inc. is used in the current experimental study to excite the cable in the forced vibration tests. It can provide up to 7 ... See full document

... of pressure sensors. Pressure sensor one is placed 50mm before the inlet flange of the converter ...The pressure sensor two is placed open to the atmospheric ...outlet pressure of the ... See full document

... The meshing of the flow domain for various geometries of orifice plate is shown in Fig. 3. Using automatic volume mesh generation tool, these domains were meshed with tetrahedral elements. The total number of ... See full document

... Vibration caused structure fatigue failure is a common occurrence in industry ...flow-induced vibration issue in nuclear piping, routine design process does not take it into ...the vibration ... See full document

... A scanning electron microscope (SEM) is a type of electron microscope that produces images of a sample by scanning the surface with a focused beam of electrons. The electrons interact with atoms in the sample, producing ... See full document

... Modal analysis of a fixed-fixed ends beam. In preliminary stage, a dynamic characteristic of fixed-fixed ends beam was determined by three methods; mathematical equations by Matlab®, finite element analysis by ... See full document

... effect induced by the cylinder’s horizontal ...streamwise vibration ˆ x/D for the concave case also shows increasing amplitude taking off for re- duced velocities higher than 10 and reaching ˆ x/D ≈ ... See full document

... release fluctuation (~ 10 % amplitude of the mean value) was induced by imposing pressure fluctuations (where only ~ ...the fluctuation level and the phase shift of fluctuations were evident ... See full document

... The pressure in a homogeneous, incompressible fluid at rest depends on the depth of the fluid, and is not influenced by the size or shape of the tank or the container in which the fluid is held ... See full document

... mechanical vibration causes the voltage fluctuation, the experiments water transport in an anode flow channel were conducted for the transparent PEMFC under mechanical vibration and no mechanical ... See full document