Tokai University
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA) (ISAS)
Tokai University
Tokai University
Tokai University
47th Fluid Dynamics Conference /the 33rd Aerospace Numerical Simulation Symposium (July 2-3, 2015. Institute of Industrial Science , the University of Tokyo), Meguro, Tokyo, Japan
抄録（英）
In this study, the direct numerical simulations of the flow around a sphere on the high Mach and low Reynolds numbers condition are carried out, and the flow properties are investigated. The three-dimensional compressible Navier-Stokes equations are solved on boundary fitted coordinate system. It is confirmed to have sufficient accuracy by the previous study. Analyses are performed at the Reynolds number (based on the diameter of the sphere and the free-stream velocity) of between 100 and 300, the free-stream Mach number of between 0.3 and 2.0, and the temperature ratio of the sphere surface and free-stream of between 0.5 and 2.0. As a result, we clarified the following points: 1) the effect of the free-stream Reynolds number and temperature ratio on the flow properties, 2) the effect of the temperature ratio can be summarized by the effective Reynolds number that is newly proposed parameter.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
DNSによる高Mach数・低Reynolds数の球周りの流れ場に対するMach数や温度比の影響把握
AA1630005012.pdf
(1.43MB)
