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Post by Mark on Dec 31, 2019 12:54:40 GMT
Can DANTE simulate a high pressure gas quenching process?
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Post by Admin on Dec 31, 2019 12:59:18 GMT
Yes, but unlike liquid quenching the heat transfer coefficient is generally assumed to remain constant. So long as the flow conditions remain constant. However, the ambient temperature becomes a function of time.
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Post by Mark on Dec 31, 2019 13:02:20 GMT
Why does the ambient temperature change with time?
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Post by Admin on Dec 31, 2019 13:14:59 GMT
The ambient temperature changes due to the low heat capacity of the gas. As the hot part is introduced into the cold chamber (for a multiple chamber system) or as the cold gas is introduced into the hot chamber (single chamber system) the gas around the part is heated. There is not enough gas available, even with 10 or 20 bar systems, to remove heat from the work piece without heating up. As the work cools, the air surrounding the parts does not heat up as much and slowly comes down in temperature. This rise and fall of the gas temperature will be dependent on the gas type, gas pressure, gas velocity, and size of the work load.
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