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- W1968154480 abstract "Single-blow test data are often used as the basis for fundamental convective heat transfer correlations. However, if the heat transfer model used to relate the measured temperature history to an avergge heat transfer coefficient does not accurately describe the experiment, then the accuracy of the data may be low. The results of simulations are presented that quantify the error in the estimated heat transfer coefficient due to specific common mismatches between the model and the experiment. The areas of mismatches include inlett fluid temper history, longitudinal conduction in the solid, variable local convective coefficient, and effective core mass. One symptom of a mismatch between the model and the experiment is that different criteria for comparing the measured and predicted temperature histories may yield different estimates for the performance of the same heat exchanger. The results obtained using direct temperature history and derivative and integral evaluation criteria are compared. It is shown that even if two different crit yield similar estimates for the average heat transfer coefficient, these estimates may be far from correct. The results presented in this paper lead to the recommendation that singl-blow facilities be calibrated with tests on a core of known performance to demonstrate the appropriateness of the model as well as the accuracy of the measurements and thus establish a minimum level of confidence in new data." @default.
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- W1968154480 date "1990-11-01" @default.
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- W1968154480 title "Evaluating the results of the single-blow transient heat exchanger test" @default.
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- W1968154480 doi "https://doi.org/10.1016/0894-1777(90)90073-g" @default.
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