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-   -   CDAtransonic calculation,but ma from the middle flowpath to outlet is above 1. (http://www.cfd-online.com/Forums/main/94239-cdatransonic-calculation-but-ma-middle-flowpath-outlet-above-1-a.html)

shouhuopxm November 10, 2011 03:22

CDAtransonic calculation,but ma from the middle flowpath to outlet is above 1.
 
Recently I was calculating CDA in transonic flow.But the flow speed of outlet is above 1,and the blade is useless in increasing pressure.the following is the condition:Re.263330..steady..Turbulent Navier-Stokes..Spalart-Allmaras(also use k-epsilon (Extended Wall Function),the difference is not apparent)..inlet condition(104.25m/s,Vz227.25m/s(mach number0.73)temperasure,293K)..outlet condition(static pressure101325Pa).that's the condition ,but ma from the middle flowpath to outlet is above 1. .I dont know where wrong is.
When ma of inlet is above 0.76 ,the calculation does't converge.http://www.cfd-online.com/Forums/mem...95-mid-rma.png


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