| Summary: | 碩士 === 逢甲大學 === 航太與系統工程所 === 98 === The effects of rotor recess configuration and volume on the flow field inside combustor ware discussed in detail.
The key parameters include rotor recess configuration and volume, air-fuel equivalence ratio, and engine speed. The optimal configuration of rotor recess was first determined as the basic configuration for the study of other key parameters.
In this research, different rotor recesses according to open direction include leading deep recess, medium deep recess and trailing deep recess. The results of simulation indicate that the leading deep recess is the preferred configuration which is consistent with previous reports in literature. The volume of rotor recess can be expressed by compression ratio. It was found that there exists an optimal compression ratio. That is, further reduction of rotor recess volume to increase compression ratio can not promote the output horsepower. In addition, it was found that lean combustion can increase the temperature inside combustor to increase the engine horsepower. Increasing of engine speed can also increases the engine horsepower effectively.
Keywords: Rotary engine, Recess configuration, Recess volume, Air-fuel equivalence ratio, Engine speed
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