Abstract
A multi-disciplinary finite element methodology with stabilizing features to prevent undue oscillatory solution behavior for the velocities, pressure and temperature fields and which subsequently permits computations of the resulting thermal loads for the associated stress analysis is described for convectively cooled structures subjected to high intensity localized heating. Of particular interest are the influence of coolants which serve to cool the structure whose exposed skin is permitted to radiate to outer space. Of the three coolants investigated, namely, liquid hydrogen, water and liquid sodium. It is observed that the liquid sodium serves as an effective coolant which is consistent with past related studies. The resulting thermally induced stresses arising from the assumption of an elastic and a materially nonlinear elasto-plastic model are also evaluated. The nonlinear model seems more realistic because of the situations encountered at high temperatures and as expected yields lower values of the stresses. Illustrative examples of: a) a flat skin structure, and b) a curved skin geometry representing the cowl leading edge are analyzed for the flow/thermal and induced stresses.
| Original language | English (US) |
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| Title of host publication | Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference |
| Pages | 3543-3552 |
| Number of pages | 10 |
| Volume | 5 |
| State | Published - 1995 |
| Event | Proceedings of the 36th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and AIAA/ASME Adaptive Structures Forum. Part 1 (of 5) - New Orleans, LA, USA Duration: Apr 10 1995 → Apr 13 1995 |
Other
| Other | Proceedings of the 36th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference and AIAA/ASME Adaptive Structures Forum. Part 1 (of 5) |
|---|---|
| City | New Orleans, LA, USA |
| Period | 4/10/95 → 4/13/95 |