A jet flow from a triangular-inlet orifice can be made to oscillate or “precess” by partially confining it with a short cylindrical chamber. However, for a narrow range of chamber lengths, the jet is deflected but does not oscillate. Earlier flow-visualisation experiments with this stationary-deflected triangular jet (SDTJ) have revealed a complex flow pattern inside the chamber. The aim of thi...

Abstract Turbines are core components in jet engines for flight propulsion, power plants, and other important energy conversion processes. They composed of successive rows blades so that wakes upstream reach subsequent where they perturb the flow an unsteady manner. At point a wake reaches downstream blades, perturbation forms so-called negative jet. In this work, we show partially fulfills con...

This paper discusses accuracy improvements to Reynolds-Averaged Navier–Stokes (RANS) modeling of supersonic flow by assessing a wide range factors for physics capture. Numerical simulations reveal complex behavior resulting from shock and expansion waves so, jet emanating rectangular nozzle is considered. PIV based experimental data the available literature used validation purposes. Effect vari...

Screech tones in supersonic jets are underpinned by resonance between downstream-travelling Kelvin–Helmholtz waves and upstream-travelling acoustic waves. Specifically, recent works suggest that the relevant guided within jet described a discrete mode of linearised Euler equations. However, reflection mechanism converts into waves, vice versa , has not been thoroughly addressed, leading to miss...

the rectangular broad crested weirs are widely used to measure the water dischargewhich is one of the most popular tools in the irrigation canals particularly, in developingcountries.the present article is trying to demonstrate the results of an experimental work carriedout on rectangular broad crested weir with sloped upstream face to investigate the effect ofupstream slope on discharge effici...

This study presents Stereoscopic particle image velocimetry measurements of a precessing motion resulting from sudden expansion an axisymmetric jet into coaxial chamber. The has ratio 4.9 and aspect 2.03. velocity profile in the inlet tube is measured upstream using Laser doppler anemometry. Reynolds number (Re) varied 3160 to 63,870. time-averaged flow field exhibits behavior, near resembles t...

Abstract We explore the connection between ? -ray and radio emission in jet of blazar 0716+714 by using 15, 37, 230 GHz 0.1–200 GeV light curves spanning 10.5 yr (2008–2019). find significant positive negative correlations fluxes different time ranges. The delays suggest that observed flares originated from multiple regions upstream core, within a few parsecs central engine. Using time-resolved...

Abstract The pedestal structure, edge transport and linear MHD stability have been analyzed in a series of JET with the ITER-like wall hydrogen (H) deuterium (D) type I ELMy H-mode plasmas. pressure is typically higher D than H at same input power gas rate, difference mainly due to lower density (Maggi et al (JET Contributors) 2018 Plasma Phys. Control. Fusion 60 014045). A balance analysis has...

Abstract Using outputs from an ecosystem model embedded in eddy-resolving ocean general circulation that can realistically simulate decadal modulations of the Kuroshio Extension (KE) between stable and unstable states, variations phytoplankton concentration upstream KE region are investigated. During states KE, surface concentrations anomalously suppressed to south front, while those north enha...