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steadyCompressibleMRFFoam

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Old   July 7, 2014, 08:56
Default steadyCompressibleMRFFoam
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Hi everybody
Recently the solver "steadyCompressibleMRFFoam" is released in foam-extend-3.1. I tried to use it to simulate a centrifugal rotor including main and splitter blade with shaft speed of 60000RPM. In my calculation, when the shaft speed is set to zero, the calculation of the single rotor passage similar to a tube runs fluently, and the distribution of rho, T and U is reasonable. When I increased the shaft speed to 500 RPM, though the calculation still runs fluently and the inlet and outlet mass flow rates agrees well, the distribution of T and rho always exceeds the bound (see the following figure- temperature of main and splitter blade surface) obviously. The maximum temperature on the blade suction surface arrives at 3000 K . It should be noted that I use O-grid to surround the blade surface. I can not configure out what causes this. Could somebody give me some help
Before this I have used transonicMRFDyMFoam and rhoPorousMRFFoam. Both of them works well for this case with shaft speed of 60000RPM.
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