B-12 地上ジェットエンジンテストセルのCFDモデルの検討(空力・CFD,一般講演)
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概要
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Measured thrust in a test facility (indoor cell) is different from the gross thrust which is the true thrust of a jet engine. This difference is caused by aerodynamics effects induced by the secondary airflow which bypasses the engine in the indoor cell. Thrust correlation parameter between the measured thrust in an indoor cell and the gloss thrust is called cell factor. From past survey, it has been revealed that the total pressure loss of rear parts in an indoor cell is larger than that of front parts. It means that the rear configuration in an indoor cell affects more strongly on the airflow compared with the front configuration. In this paper, CFD modeling for rear configuration in an indoor cell is investigated and the accuracy is improved successfully. It was also found that the real porous model for the blast-suppressor is better than the model which is a simple unity surface with Darcy law. In addition, some examples of parameter survey about the indoor cell configuration by CFD are reported in this paper.
- 2011-07-06
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