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titleMomentum balance model of flow field with pseudo-shock
Other Title擬似衝撃波を含む流れの運動量釣合モデル
Author(jpn)苅田 丈士; 谷 香一郎
Author(eng)Kanda, Takeshi; Tani, Koichiro
Author Affiliation(jpn)宇宙航空研究開発機構 総合技術研究本部 角田宇宙センター 複合推進研究グループ; 宇宙航空研究開発機構 総合技術研究本部 角田宇宙センター 複合推進研究グループ
Author Affiliation(eng)Japan Aerospace Exploration Agency Combined Propulsion Research Group, Kakuda Space Center, Institute of Aerospace Technology; Japan Aerospace Exploration Agency Combined Propulsion Research Group, Kakuda Space Center, Institute of Aerospace Technology
Issue Date2007-03-30
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication date2007-03-30
AbstractThe length of a pseudo-shock was estimated with a new momentum balance model. In this simple model, it is presumed that there is no wall friction in the region of the pseudo-shock. Inflow conditions are specified at a boundary sufficiently upstream of the pseudo-shock. The outflow boundary condition is applied with, for example, specified pressure or choking. The outflow impulse function is balanced with the inflow impulse function, the wall friction upstream of the pseudo-shock, and the reaction force from the wall. The starting position of the pseudo-shock is determined through balance of the forces in this model, and the length of the pseudo-shock is also determined. The model was applied to several kinds of flow fields, for example, straight ducts with and without a backward-facing step, and divergent ducts. The model was also applied to the diffuser of an ejector-jet, in which two gases flowed in parallel. The calculated results reasonably agreed with the experimental results within the scope of preliminary application. The starting position of the pseudo-shock was primarily dominated by the reaction force in the divergent duct. Several features of the pseudo-shock were discussed with the present model.
DescriptionJAXA Research and Development Report
Keywordsmomentum; momentum balance model; flow distribution; pseudo-shock; shock wave; wall friction; ejector jet; diffuser; supersonic flow; boundary layer; parallel flow; 運動量; 運動量釣合モデル; 流れの分布; 擬似衝撃波; 衝撃波; 壁面摩擦; エジェクタジェット; ディフューザ; 超音速流; 境界層; 並行流
Document TypeTechnical Report
JAXA Category研究開発報告
Report NoJAXA-RR-06-037E

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