最后利用可压缩程序计算了小孔型脉管制冷机当小孔处于最佳开度时小孔处的气流分布。

Finally, the calculated velocity distribution at the orifice of the orifice pulse tube refrigerator was presented at the condition of the optimum opening of the orifice.

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孔型吸音板是一种在密度板的正面、背面 都开圆孔的结构吸声材料。

The bore sound-absorption panel is a construction sound-absorption material which have round bore in both the front and back of the density panel.

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