| This thesis documents the development of a design algorithm for a modern lean premixed prevaporized (LPP) combustor. The methodology was applied to a 1-MW marine gas turbine engine to illustrate the design procedure.; The algorithm includes a set of preliminary design procedures involving the use of empirical and semi-empirical models. These models capture complex processes such as droplet evaporation, chemical reaction, jet mixing, and heat transfer. Evaluation of the structural integrity of the design was also performed using the theory of solid mechanics.; The preliminary design procedures were verified using the advanced numerical techniques of computational fluid dynamics (CFD) and finite element analysis (FEA). These techniques are used to solve the swirling flowfield inside the premixer, the reacting flowfield inside the liner, and the complex stress state in the liner walls. Although CFD and FEA indicated that the preliminary design was successful, some large discrepancies existed between the predictions. These findings suggest the need for more complex numerical models and experimental testing to validate the preliminary design.; A three-dimensional solid model of the combustor and a complete set of engineering drawings were prepared and included as part of the mechanical design. |
