A high-resolution stereoscopic particle image velocimetry (PIV) system was used to conduct three-dimensional measurement of an air jet exhausted from a lobed nozzle. The characteristics of the mixing process in the lobed jet  ow are revealed clearly and quantitatively from the stereoscopic PIV measurement results. The instantaneous velocity and streamwise vorticity distributions revealed that ...

In the most application of nozzle with gas-liquid two-phase flow, the quality of mixture in exhaust of nozzle is the most important parameter as well as the flow velocity. On the other hand, in some industrial application, such as water injection in forced induction (turbocharged or supercharged) internal combustion engine the spray quality is the main goal of designing. In this case and for im...

The application prospect of a flow focusing/blurring nozzle is broad but research on gas-liquid inside the not comprehensive. mixing difficult to study by visualization experiment, so this paper proposes or gray scale level distribution experimental images. results show that increase air rate beneficial two-phase nozzle, while influence water rate, tube hole distance (the between inner and outl...

We introduce an analog model for the conformally coupled scalar field on BTZ black hole. The is based propagation of acoustic waves in a Laval nozzle. Since hole not globally hyperbolic spacetime, dynamics well defined until extra boundary conditions are prescribed at its spatial infinity. show that quasinormal modes (QNMs) satisfying Dirichlet, Neumann, and Robin can be interpreted terms ordin...

Compressible gas flow inside a convergent-divergent nozzle and its exhaust plume atdifferent nozzle pressure ratios (NPR) have been numerically studied with severalturbulence models. The numerical results reveal that, the SST k–ω model give the bestresults compared with other models in time and accuracy. The effect of changes in value ofdivergence half-angle (ε ) on the nozzle performance, thru...