Date of Award
Doctor of Philosophy (PhD)
Gregory V. Selby
Sushil K. Chaturvedi
Arthur C. Taylor, III
A computational parametric investigation was conducted to study the effect of variations to several geometric parameters on the performance of a two-dimensional model scramjet engine (square cross section area for 3-D model). Geometric parameters included backstep location, height, and angle and fuel injector angle, diameter, and location. Two- and three-dimensional geometries have been studied, using a finite-volume computational fluid dynamics (CFD) code (FLUENT) with structured grids with sizes between 50,000 and 90,000 cells for the two-dimensional geometry and with structured hexahedral grid sizes between 650,000 and 949,725 cells for the three-dimensional geometry. Otherwise, identical values of program inputs were utilized for the two- and three-dimensional simulations.
Performance parameters investigated were combustion efficiency, thrust, pressure losses, and the equivalence ratio for the hydrogen-air combustor. A set of values for independent variables was identified which resulted in maximum thrust, minimum pressure losses, and an equivalence ratio close to unity.
"Numerical Study of the Performance of a Model Scramjet Engine"
(2012). Doctor of Philosophy (PhD), dissertation, Mechanical Engineering, Old Dominion University, DOI: 10.25777/22bs-sk78