Bubble breakup and associated gaseous cavitation inception triggered by a single bubble injected into the flow of aviation fuel flowing in converging–diverging nozzle are characterized employing advanced computer vision (CV) algorithms. The obtained statistics from CV blob detection analysis provide unprecedented quantitative data non-intrusive imaging techniques reveal valuable insights regard...

Cavitation and turbulence in a diesel injector nozzle has a great effect on the development and primary breakup of spray. However, the mechanism of the cavitation flow inside the nozzle and its influence on spray characteristics have not been clearly known yet because of the internal nozzle flow complexities. In this paper, a comprehensive numerical simulation is carried out to study the intern...

Thermophysical properties of molten core materials (corium) are necessary input parameters models and computer codes which predict the severe accident progression in light water reactors. The corium contains components UO 2 , ZrO Zr Fe. measurement is a very challenging task due to high melting points can reach 3000 K. This paper presents density system for drop based on techniques aerodynamic ...

Abstract The gas content is one of the important factors in cavitation, which may increase pressure inside cavity through diffusive mass transfer dissolved into cavity. In present study, we try to directly measure sheet at throat a converging-diverging nozzle. Then influences flow velocity and (amount oxygen) on partial are investigated. It found that, even low level, slightly but apparently hi...

The main objective of the present study is to utilize a novel linearization strategy to linearize the convection terms of the quasi-one-dimensional Euler governing equations on collocated grids and to examine its shock-capturing capabilities. To avoid a pressure checkerboard problem on the collocated grids, it is necessary to utilize two velocity definitions at each cell face. Similarly, we def...

In the cold-spray process, metal powder particles develop into a coating as a result of ballistic impingment on a substrate. In cold-spray, compressed gas (air, nitrogen or helium), at pressures ranging between 1.4– 3.4 MPa (200–500 psi), but typically around 1.7 MPa (250 psi), flows through a manifold system containing a gas heater and a powder feeder. The pressurized gas is heated electricall...

A MW-class electrothermal arcjet based on a water-cooled, wall-stabilized, constricted arc discharge configuration was subjected to extensive performance testing using hydrogen and simulated ammonia propellants with the deliberate aim of advancing technology readiness level for potential space propulsion applications. The breadboard design incorporates alternating conductor/insulator wafers to ...

Low-pressure radiofrequency (rf) plasma sources have been widely used in various fields. When static magnetic fields are applied to these sources, a diverging field configuration known as nozzle forms downstream of the source and interesting phenomena observed. Such structures frequently observed space, e.g., surface Sun geomagnetic Here, studies performed by authors over last decade on fundame...

In a grid-less Electron Cyclotron Resonance (ECR) plasma thruster with diverging magnetic nozzle, the magnitude of ambipolar field accelerating positive ions depends perpendicular energy gained by electrons. This work investigates heating electrons electromagnetic waves, taking their bouncing motion into account in confining well formed mirror force and electrostatic potential thruster. An Part...