It is concluded that among various inner limits the presence of sonic limit is...
认为在各种内部极限中声速极限容易发生，而发生的地区在上升绝热管入口段。
When the radial component of the vapour velocity and the axial variation of the vapour temperature were neglected, the error of the sonic limit is within 10 per cent.
结果表明：忽略加热段内蒸汽温度的轴向变化及蒸汽流动的径向变化，钠热管声速限与实际误差在10%以内。 理论与实验较为吻合。
The experimental result shows high-temperature heat pipe fin has the better characteristic and is not restricted by sonic limit, entrainment limit and capillary limit during the operation process.
结果表明该高温热管翅在不同功率下连续工作稳定，无异常现象，没有遇到声速传热极限、携带极限、毛细极限的制约。
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