In this article, six kinds of reverse Brayton cycles of helium are studied analytically and the flow field of the header of their heat exchangers is simulated numerically. 本文正是基于上述考慮，選取了六種氦氣逆布雷頓制冷循環(huán)模式，并對其進(jìn)行了熱力學(xué)分析，詳細地討論并對比了各個(gè)循環(huán)模式的用能情況，同時(shí)還對回路中采用的換熱器封頭內部流場(chǎng)進(jìn)行了數值模擬。
The flow field around the secondary filter was vividly characterized with a porous medium model, so that the flow pattern around this kind of filter was readily obtained. 多孔介質(zhì)模型形象地描繪出了二次濾網(wǎng)的內部流場(chǎng)，獲得了該型號濾網(wǎng)的內部流動(dòng)規律。
