A two-section false cap for fuze thermophotovoltaic power supply

The fuze thermophotovoltaic (TPV) power supply converts the thermal radiation of fuze's false cap into electric power directly and the generated power increases with the increasing of false cap's temperature. Thus, in order to increase the temperature of the false cap, a two-section false cap consisting of two materials of different thermal conductivity is proposed. The results of numerical simulation indicate that compared with common false cap made of single material, the two-section false cap enjoys higher and more uniformly distributed temperature in the hemispherical nose's inner surface, and thus its radiant power is greatly enhanced. Moreover, it is also verified by the experimental results that both the generation power and efficiency of fuze TPV power supply with two-section false cap are much higher than those of common false cap. Therefore, the two-section false cap contributes greatly to improving the performance of fuze TPV power supply and thus it can be applied to fuze power supply in the future.