... of nozzle water-cooling system 2)出口条件. 给定出口处的表压强(Gauge Pressure)为0 Pa,参考压强(Operating Pressure)为 标准大气压,因为绝对压强是参考压强与表压强 的和,所以计算的绝对压强即为标准大气压. 3)固壁条件. 由于等离子枪体冷却水...
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这个参考压强,我们一般选作一巴。
就像参考压强那样。
就像我们把所有的压强都和一巴作参考,作为标准压强。
Just like we referenced everything to one bar before, as our standard pressure.
So this unique temperature and unique pressure defines a triple point everywhere, and that's a great reference point.
这样,无论在何处,三相点都具有相同的温度和压强,十分适合来作参考点。
And our other reference point is the triple point of water - reference points become zero Kelvin, absolute zero, and the triple point.
而使用绝对零度,它与压强无关,是最低的温度,另一个参考点是水的三相点。
Just like our substance doesn't care where the gas is. It's kind of universal.
与压强无关的参考点,那就再好不过了。
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