TITLE:

COMPUTATIONAL ANALYSIS OF DROPLET- AND SEPARATED HIGH-SPEED FLOWS

DATE:

Friday, November 6th, 2009

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Gustaaf Jacobs, Assistant Professor,
Department of Aerospace Engineering, San Diego State University

ABSTRACT:

The optimization of fuel droplet/particle and fuel-air mixing improves performance of scramjets and pulse detonation engines and reduces environmental pollution. Understanding the impact of debris in explosions can save lives. The flows in dust explosions and in high-speed combustors are characterized by the intricate interactions between droplets, particles, separated shear layers, turbulence and/or shocks. The tremendous complexity of this interaction has left many question unanswered. I will discuss efforts to computationally analyze the droplet- and particle-laden flows. I will first discuss high-fidelity Eulerian-Lagrangian computational method that model the gas flow equations in the Eulerian frame with high-order methods, while particles are traced along their path in the Lagrangian frame. I will discuss high-order coupling between the two frames and illustrate the performance of the method. I will secondly discuss flow separation, compressibility effects and the droplet dispersion of flows with relevance to the high-speed separated flows in simplified combustor geometries.

HOST:

Satchi Venkataraman

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