... of the centrifugal compressor impeller. The study consists of detailed measurements in a large-scale fishtail diffuser rig with a geometry that is typical of those used in small gas-turbine engines. Measurements of the transient velocity field have been performed at five cross-sectional planes throughout...

... into a computer code (Kellum 27 ) for simulating detailed transients inside typical booster pump stations for oil pipelines. This code is used to simulate check valve slam transients described next. In check valve slam tests, a desired initial steady flow is established through the test rig...

...Jian-Jun Shu, Associate Professor, A finite element model and its equivalent electronic analogue circuit has been developed for fluid transients in hydraulic transmission lines with laminar frequency-dependent friction. Basic equations are approximated to be a set of ordinary differential equations...

... of the air entrainment, reasonable predictions of transient pressures with proper phasing and attenuation of pressure peaks can be obtained. The results obtained are consistent with observations from field measurements made when the pumps were operating at low pump cutout levels where air entrainment due...

... or transient RANS modelling because of the clear separation between the scales of the coherent, periodic motions and the random turbulent motions. Franke and Rodi 1 considered turbulent vortex shedding from an isolated cylinder at a Reynolds number Re D = 22,000 using different RANS-based...

...M. A. Chaiko; K. W. Brinckman Water hammer transients in a pipe line with an entrapped air pocket are analyzed with three one-dimensional models of varying complexity. The most simple model neglects the influence of gas-liquid interface movement on wave propagation through the liquid region...

...Jim C. P. Liou, Professor, Wylie’s discrete gas cavity model offers a simple way to simulate transients in liquids with a small amount of free gas, and to model vaporous and gaseous cavitations. It uses a constant and gas-free wave speed to avoid interpolations and a weighting factor to control...

... that entrained, entrapped, or released gases in the transient fluid system tend to amplify the first pressure peak, increase surge damping, and produce asymmetric pressure surges with respect to the static head. The pressure surges showed longer periods of down-surge and shorter periods of upsurge. The upsurge...