Speaker: Dr. Tulin Kaman, Department of Mathematical Sciences
Date: Tuesday September 14, 2021, 3:30 PM – 4:40 PM
Location: Zoom (if you wish to receive the link, contact Dr. Kaman (tkaman@uark.edu)
Title: Simulation of turbulent combustion with finite-rate chemistry in scramjet engine
Abstract: A scramjet is a supersonic combustion ramjet in which air flows at supersonic speed and combustion takes place in the supersonic airflow through the engine. It is challenging to mathematically model and computationally analyze how fuel and air flow through a scramjet engine. Experimental and numerical studies of the scramjet combustion chamber have been performed in recent decades to quantify the uncertainties in the design of hypersonic aircraft. In this talk, we will introduce numerical approaches to modeling and simulating the turbulence and combustion. We will present Large Eddy Simulation of the combustion chamber of a scramjet experiment with finite rate chemistry, using only the fundamental chemical reaction equations. The combustion process modeled by the finite rate chemistry is based on the notion that it can be resolved on a larger scale than the turbulence Kolmogorov scale. We provide necessary guidance to the grid resolution needed to resolve the flame structures accurately and perform a full-domain numerical simulation of a three-dimensional scramjet experimental aircraft at Mach 7.
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