Abstract
The low thermal performance of conventional micro-combustor (CMC) is one of the major obstacles hindering the development of micro-thermophotovoltaic (MTPV) system. In the present research, micro-combustor with conical ring (MCCR) is proposed to enhance the overall performance. A comparative study of the temperature field, pressure field, velocity field and combustion efficiency of the CMC and MCCR is conducted. The numerical results show that when the inlet velocity is 8 m/s, compared with the CMC, the mean outer wall temperature, combustion efficiency and pressure loss of the MCCR-6 increased by 32.3 K (2.6%), 0.05% and 718.6 Pa (273.4%), respectively, while the standard deviation of outer wall temperature decreased by 31.4 K (49.5%). Additionally, the MC made using SiC provides a better overall performance, the conical ring (CR) is installed at 6 mm from the step with better overall performance.
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