FDNS code to predict wall heat fluxes or wall temperatures in rocket nozzles
United States: NASA Center for Aerospace Information (CASI), 1993
Online
report
This report summarizes the findings on the NASA contract NAG8-212, Task No. 3. The overall project consists of three tasks, all of which have been successfully completed. In addition, some supporting supplemental work, not required by the contract, has been performed and is documented herein. Task 1 involved the modification of the wall functions in the code FDNS to use a Reynolds Analogy-based method. Task 2 involved the verification of the code against experimentally available data. The data chosen for comparison was from an experiment involving the injection of helium from a wall jet. Results obtained in completing this task also show the sensitivity of the FDNS code to unknown conditions at the injection slot. Task 3 required computation of the flow of hot exhaust gases through the P&W 40K subscale nozzle. Computations were performed both with and without film coolant injection. The FDNS program tends to overpredict heat fluxes, but, with suitable modeling of backside cooling, may give reasonable wall temperature predictions. For film cooling in the P&W 40K calorimeter subscale nozzle, the average wall temperature is reduced from 1750 R to about 1050 R by the film cooling. The average wall heat flux is reduced by a factor of three.
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FDNS code to predict wall heat fluxes or wall temperatures in rocket nozzles
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Autor/in / Beteiligte Person: | Karr, Gerald R |
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Veröffentlichung: | United States: NASA Center for Aerospace Information (CASI), 1993 |
Medientyp: | report |
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