近年，MEMS技術による微小機械システムの研究がrn盛んである．燃焼エネルギーは，従来のバッテリーなrnどに比べ高いエネルギー密度を有しており，超小型ガrnスタービンUMGT（Ultra-micro gas turbine）は，高性能携rn帯電源などとして世界中で研究が続けられ，将来の実rn用化が期待されている．しかしながら，UMGTの実現rnのためには，燃焼方式の確立，製作技術のさらなる革rn新，材料の選定，耐久性の問題など，数多くの課題をrn解決しなければならない．%Numerical analysis of ultra-micro combustor for UMGT was carried out by comparing with an experiment result. First of all, we examined the flat-flame ultra-micro combustor with porous medium injector. We succeeded in simulating this porous medium by the equivalent gaseous channel with limiting temperature, and confirmed the reliability of analytical model adopted. Then, we elucidated the effects of equivalence ratio, wall temperature and combustor size on the flow field and flame structure. The energy density becomes large with the decrease in combustor size. Furthermore, we examined the slit type combustor by comparing with the flat-flame ultra-micro combustor. The combustion efficiency is very high for the slit type combustor, so that the complete combustion is achieved. Especially, the high energy density and small heat loss are achieved for the combustor with inner slit, so that high-load combustion can be realized.
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