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With spike and without spike drag on blunt body |
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September 18, 2023, 12:03 |
With spike and without spike drag on blunt body
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New Member
Singh
Join Date: Jul 2023
Posts: 7
Rep Power: 2 |
Greetings to all experts,
I have been running a simulation on a hemispherical blunt body on sonicFoam which has a total length of 1 m. The free-stream conditions are: U = 2339.26 m/s / Mach 6.82 P = 101325 Pa T = 300 K mu = 0.011965 rho_inf = 1.176407 Re no. = 0.23 * 10^6 Other thermal properties like Cv are of standard air. Both the top wall and the bottom wall is supersonicFreestream. I have validated an experimental data and the force results checks out well. I have also simulated the same blunt body with a spike of 1m in the front with all the same setup including the schemes and Boundary conditions. (Both reference length while calculating Re no. is taken as 1m) But when I calculate the drag forces for both, the drag is coming almost same for with spike and without spike which is absurd as the added spike should reduce drag. I think I have setup the case right but might have missed something? Somebody please help me in this case. Files link: https://drive.google.com/file/d/1d8Z...usp=drive_link |
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