Title: Analysis on Performance of Leaf Spring Rotary Engine
Abstract: This paper is a simulation study of a novel rotary engine called Leaf Spring Rotary Engine, which is a micro-small reed-flexible rotor engine. Flexible characteristics make it a unique advantage. This engine's structure is different to others, mainly for rotor structure. Engine working principle is similar to conventional rotary engine. As a new engine, creation of numerical models and analysis of impact factor for engine performance are the focus of this work. Desi*gned displacement of the engine is 1.77 cm3 and theoretical compression ratio is 7.3. According to the principle of the engine, the whole structure and sub-system were designed, and thermodynamic model of the engine were established. Re*sults show that output power of one cylinder is 81.4W; indicative efficiency is 24.38% under ideal condition when engine operates at speeds of 3000 RPM; the energy loss under heat transfer condition is about 18.34% of the overall energy. The leakage area of 0.02 mm2 is considered so that power loss induced by the leakage is about 32.4% of output power under ideal conditions. Besides, the results also show that the reasonable matching of combustion duration and ignition angle can improve output power. Moreover, high compression ratio of the engine causes high heat loss.