Modeling & Simulation for Optimization of Heavy-Fuel Micro Rotary Engines

This program will conduct analytical studies and demonstrate the conversion of the UEL, rotary engine, to run on heavy fuel. Specifically, CFD modeling will be used to show how direct injection/stratified charge can be employed to convert this engine to heavy fuel. The direct injection will avoid predetonation, while the stratified charge or layering of the fuel air mixture will be investigated for a "lean burn" characteristic to achieve the best fuel economy. Further, the spray pattern will show a rich fuel mixture at the point of ignition for sufficient starting ease. The effects of turbocharging will also be modeled. Thermodynamic cycle analysis will be used as a first order attempt to show the benefits of turbocharging. Computational Fluid Dynamics (CFD) will be used for the combustion design; showing the optimum location for the fuel injectors/igniters, spray pattern, mixing, and the corresponding combustion process. CFD will be used to determine optimal rotor pocket geometery. Lastly, the engine will be modified to demonstrate the performance of the rotary engine running on heavy fuel (Diesel). Modifications will include sizing/adapting the turbocharger, modifying existing fuel injectiors, and modifications to the housing for fuel injector application.