Enhancement Mechanism of Impinging Atomization by Gas Injection

Numerical Simulation of Primary Atomization of Non-Newtonian Impinging Jets

Newtonian impinging jets have been investigated for decades. However, limited is known about non-Newtonian impinging jets. The present work attempts to improve this situation by performing high-fidelity numerical simulations of non-Newtonian impinging jet dynamics. Emphasis is placed on the near field of the liquid sheet formed by the impingement of two shear-thinning (viscosity deceases with i...

High-Fidelity Simulations of Primary Breakup and Impinging Jet Atomization

Atomization Uniformity in Gas -

There are two important aspects to good injector performance in rocket engines—the atomization performance (droplet size and distribution, for example) and uniformity of operation (even distribution of droplets in time and space). In general, both of these aspects are affected by the geometry and operating conditions of the injector. In studying atomization performance, prior work has largely f...

Craters Formed in Granular Beds by Impinging Jets of Gas

When a jet of gas impinges vertically on a granular bed and forms a crater, the grains may be moved by several different mechanisms: viscous erosion, diffused gas eruption, bearing capacity failure, and/or diffusion-driven shearing. The relative importance of these mechanisms depends upon the flow regime of the gas, the mechanical state of the granular material, and other physical parameters. H...

Effect of temperature on atomization in gas centered coaxial injection systems

This paper summarizes the current status of research work carried out at IISc on the characterization of liquid sprays developing from gas centered coaxial injection systems. The coaxial system injects an annular swirling liquid sheet and a central gaseous jet. The interaction process between the swirling liquid sheet and the non-swirling gaseous jet results in a fine spray. The present study a...