Опубликована: Янв. 1, 2023

PCMs are widely employed in electronic thermal control systems for spacecraft because of their substantial energy storage competencies. Therefore, the influence gravitational acceleration (GA) on PCM performance is particular importance. Simultaneously, considering spacecraft's center gravity, attitude control, and structural design, selection an appropriate battery orientation becomes crucial to maximize utilization available space. This study employs numerical simulation assess heat transfer efficiency behavior BTMS cooled under varying environments (0.05 g, 0.1 1 10 20 g) different inclination angles (θ=90°, 45°, 0°) via enthalpy-porosity method. Research results indicate that as gravity increases from 0.05 g melting time shortened by 15%, reducing 95.05 s 81.30 s. phenomenon can be explained enhanced convective capability, increasing maximum velocity (Vmax) liquid (PCMl) over 12 times. Particularly, when GA= θ 45° 90° reduces 59.05s (9.66% reduction) compared θ=45°, while at θ=0°, it decreases 65.75 (10.75% reduction). Notably, some unmelted solid accumulates lower right corner enclosure hindering transfer. Based characteristics accumulation effects, three optimization structures proposed this study. It observed t=240s enhancement particularly prominent with presence fins. Furthermore, comparing CHTC curves before after optimization, evident accumulated effect has been effectively eliminated optimization. In conclusion, paper conducted in-depth investigation into correlation between fin mass, well volume ratio(γ) was that, condition same speed, optimized model impact weight values θ. comparison θ=90°, θ=45° increase approximately 1g mass sufficient achieve complete PCM, whereas 11.2% required. distinctly highlights significant results. These research findings offer reference insights design aerospace field.

Язык: Английский