11795

Preliminary Heat Transfer Results

The surfaces were also evaluated for the average Stanton number using the modeling choices stated previously. The surfaces were modeled with a reference surface at the mean hydraulic elevation. The Deposit Cone surface, the Erosion Cone surface, the Erosion surface, and the Erosion Layered surface were analyzed using the circular-blockage-element function. The Deposit and the Deposit Layered surfaces were analyzed using the ellipsoidal-blockage-element function for elemental drag calculations, but the circular element Nusselt relations were used for predicting the heat transfer. The fluid was evaluated as a constant property gas. Using a constant property gas code produces some error, but the assumption is adequate for initial estimates of the average surface Stanton numbers. The computational results for all of the surfaces, including the flat plate surface, are compared to the experimental data from Hodge (2000) in Table 4.

Table 4. Surface Heat Transfer Results with Corrected Experimental Data

Surface

Average Rex

Measured Stx

Predicted Stx

% Difference

Erosion Cone

0 0

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