Technical Paper
The Numerical Investigation on the Performance of Rotary Engine with Leakage, Different Fuels and Recess sizes
2013-10-15
2013-32-9160
This study investigates the influence of leakage through the apex seal, fuel type and recess size on the performance of a Rotary Engine. A commercial CFD software, Fluent, was applied and a two-dimensional model was constructed to predict the engine performance. Air and fuel flow into the chamber by two separate ducts in this model were used to simulate fuel-air mixing. Three different apex seal clearances (0mm, 0.4mm, 0.5mm) were simulated. The computations with two types of fuel, CH4 and C8H18, were performed and put in result comparison in this study. The recess sizes were based on three compression ratios, 8.33, 9.55 and 10.18. To simplify rotor mesh construction in the model with leakage, a porous region was generated to model this quite small gap. The generation of a porous region can greatly reduce mesh sizes and stabilize the numerical iterations.
