The purpose of this paper is to investigate combustion characteristics for rotary\nengine via numerical studies. A 3D numerical model was developed to study the influence\nof several operative parameters on combustion characteristics. A novel rotary engine called,\nââ?¬Å?Leaf Spring Rotary Engineââ?¬Â, was used to illustrate the structure and principle of the engine.\nThe aims are to (1) improve the understanding of combustion process, and (2) quantify the\ninfluence of rotational speed, excess air ratio, initial pressure and temperature on combustion\ncharacteristics. The chamber space changed with crankshaft rotation. Due to the complexity\nof chamber volume, an equivalent modeling method was presented to simulate the chamber\nspace variation. The numerical simulations were performed by solving the incompressible,\nmultiphase Unsteady Reynolds-Averaged Navierââ?¬â??Stokes Equations via the commercial code\nFLUENT using a transport equation-based combustion model; a realizable K- ? turbulence\nmodel and finite-rate/eddy-dissipation model were used to account for the effect of local\nfactors on the combustion characteristics.
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