Flashing flows of initially sub-cooled water in a converging–diverging nozzle is investigated numerically the framework two-fluid model (TFM). The thermal non-equilibrium effect phase change considered by an interfacial heat transfer model, while pressure jump across interface ignored. bubble size distribution induced nucleation, growth/shrinkage, coalescence, and breakup described based on are...

The electron-cyclotron resonance thruster with magnetic nozzle relies on two successive energy transfer processes: first from electromagnetic to electron thermal energy, facilitated by a coupling structure; and second ion directed kinetic diverging field. nature geometry of the structure are crucial process. This paper presents an experimental study performance nozzle, equipped either waveguide...

The exponential increase of industrial demand in the past two decades has led scientists to the development of alternative technologies for the fast manufacturing of engineering components, aside from standard and time consuming techniques such as casting or forging. Cold Spray (CS) is a newly developed manufacturing technique, based upon the deposition of metal powder on a substrate due to hig...

The Department of Mechanical Engineering at the California Polytechnic State University, San Luis Obispo, has developed an innovative program of experimental research and development on hybrid rocket motors (where the fuel and the oxidizer are in different phases prior to combustion). One project currently underway involves the development of aerospike nozzles for such motors. These nozzles, ho...

Acoustic analogues of black holes (dumb holes) are generated when a supersonic fluid flow entrains sound waves and forms a trapped region from which sound cannot escape. The surface of no return, the acoustic horizon, is qualitatively very similar to the event horizon of a general relativity black hole. In particular Hawking radiation (a thermal bath of phonons with temperature proportional to ...

The Department of Mechanical Engineering at the California Polytechnic State University, San Luis Obispo, has developed an innovative program of experimental research and development on hybrid rocket motors (where the fuel and the oxidizer are in different phases prior to combustion). One project currently underway involves the development of aerospike nozzles for such motors. These nozzles, ho...

It is well-known that stationary transonic solutions of the compressible Euler equations are hard to compute using the stationary form of the equations. Therefore, time marching methods with explicit or implicit time integration are normally employed. In this paper a method is described that computes one-dimensional transonic flows directly from the stationary equations. The method is based on ...

Abstract Systems with multiple jets are encountered in many engineering applications, for example, propulsion units aircraft and rockets. When more than one jet is placed close to each other, the resultant aerodynamics complicated due mutual interaction of jets. In present work, mean flowfield mixing characteristics free supersonic from twin triple converging-diverging nozzles proximity studied...

For the study of transients in gas-liquid flows, the equations of the so-called separated flow model are inadequate, because they possess, in the general case where gas and liquid move at different velocities, complex characteristics. This paper is concerned with the equations of motion for bubbly flow. The equations are discussed with emphasis on the aspects of relative motion and the characte...