Particles and condensing vapors contribute to the contamination of optical components solar thermochemical reactors including windows secondary concentrators result in severe reactor performance deterioration. We propose an impinging-jet a distinctive topology enhance aerodynamic-aided window protection. The vector fields on two-dimensional inner surfaces four conventional are analyzed for firs...

The hypothesis that simultaneous exposure to a high (8%) sodium chloride diet and behavioral stress (air jet noise) would act synergistically to increase blood pressure was investigated in male borderline hypertensive rats. Rats were fed either a 1% or an 8% sodium chloride diet beginning at 6 weeks of age. Rats in the Air Noise condition were restrained and exposed to random blasts of air jet ...

NEPTUNE_CFD is a code based on a 3D transient Eulerian two-fluid model. One of the main application targets is the two-phase Pressurized Thermal Shock (PTS), which is related to PWR Reactor Pressure Vessel (RPV) lifetime safety studies, when sub-cooled water from Emergency Core Cooling (ECC) system is injected into the possibly uncovered cold leg and penetrates into the RPV downcomer. Five expe...

Due to the ever wider use of composite materials within aerospace applications, fireproof tests get recently an increased attention. Numerical simulation is expected in the coming years to accompany engineers in their design work to increase the chance of success in the fireproof certification tests. The current research focuses on the numerical investigation of a premixed methane-air flame imp...

Abstract The study reports direct numerical simulations of a turbulent jet impinging onto smooth and rough surfaces at Reynolds number Re = 10,000 (based on the mean bulk velocity diameter). Surface roughness is included in using an immersed boundary method. deflection flow after impingement generates radial wall-jet that develops parallel to plate surface. structured into inner outer layer tha...

Experimental and numerical methods were used to explore the cooling performance of a new hybrid device consisting of a slot jet impinging into a micro-channel, thus capitalizing upon the merits of both cooling configurations. The three-dimensional heat transfer characteristics of this device were analyzed using the standard k–e turbulent model. Numerical predictions for liquid PF-5052 show exce...

An experimental study of a hydrogen-containing jet’s impact on palladium-based catalyst in an air atmosphere was carried out. High-intensity temperature fluctuations the surface are obtained case when large-scale vortex structures contained jet. These superstructures have longitudinal size 20–30 initial jet diameters and transverse about 3–4 diameters. To form such structures, it is necessary t...

Ski jumps are frequently applied as spillways of high dams. The resulting jet impact location on the plunge pool surface is often distant from the dam toe so that the latter is protected from scouring. Furthermore, the jet disintegrates and disperses prior to its impact, thereby reducing the specific energy addition to the plunge pool. The present research addresses four aspects, based on three...