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title超臨界圧/遷臨界ジェットのLES解析: 噴流構造と特徴的な振る舞いについて
Other TitleLarge-eddy simulation of trans/supercritical round jet: flow structure and its unique behavior
Author(jpn)寺島, 洋史; 河合, 宗司; 山西, 伸宏
Author(eng)Terashima, Hiroshi; Kawai, Soshi; Yamanishi, Nobuhiro
Author Affiliation(jpn)宇宙航空研究開発機構 (JAXA); 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS); 宇宙航空研究開発機構 (JAXA)
Author Affiliation(eng)Japan Aerospace Exploration Agency (JAXA); Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Japan Aerospace Exploration Agency (JAXA)
Issue Date2012-03-30
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第43回流体力学講演会: 航空宇宙数値シミュレーション技術シンポジウム2011論文集
JAXA special publication: Proceedings of 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011
Start page63
End page69
Publication date2012-03-30
AbstractLarge-eddy simulation (LES) for trans/supercritical round jet flows was conducted, using a high-resolution numerical method (LAD/compact difference scheme), in order to clarify unique characteristics of jet flows under supercritical pressure conditions. The unsteady flow structures such as vortical structure show no peculiar features due to the supercritical pressure conditions, resulting in very similar vortical structures to those of general (ideal) gas jet flows in atmospheric pressure conditions. Comparison of mean properties with a measured and an earlier computational data demonstrates the capability of the present method to fairly represent trans/supercritical jet flow behaviors. Some unique characteristics of supercritical jet flows, which were suggested in our previous study with two-dimensional planar jets, are clearly observed also in the three-dimensional round jet flows by means of LES. A series of our studies on trans/supercritical jet flows establish that the unique characteristics of supercritical jet flows appears in the transcritical injection cases as the slower increase of mean temperature in streamwise direction and the generation of smaller flow scales compared with other injection conditions, and further their appearances are simply and effectively explained by T-rho diagrams.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011 (July 7-8, 2011. Waseda University, International Conference Center), Tokyo Japan
形態: カラー図版あり
会議情報: 第43回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2011 (2011年7月7日-8日. 早稲田大学国際会議場) 東京
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-11-015

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