Japan Aerospace Exploration Agency Wind Tunnel Technology Center, Institute of Aerospace Technology
Japan Aerospace Exploration Agency Program Management and Integration Dept., Institute of Aerospace Technology
IHI Aerospace Engineering Co. Ltd.
Japan Aerospace Exploration Agency Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Institute of Space and Astronautical Science
Japan Aerospace Exploration Agency Institute of Space and Astronautical Science
For a vertical-landing rocket, one of the most important issues is the reliability of vertical soft landing using the opposing jet of the rocket engine. The interaction between engine plumes and the free stream becomes important in the design of an attitude control system in the powered deceleration phase of landing. Since this interacting region has highly nonlinear characteristics, extremely unsteady motion is observed. Measurements for this study were performed in the JAXA 2 x 2 m low-speed wind tunnel using PIV (Particle Image Velocimetry), which improves our imagery and understanding of the complicated flow behavior. From the PIV measurements we obtained two component velocity fields of the opposing jet flow in a vertical model rocket landing, and derived the shape of the opposing jet, stagnation point, and intensity of turbulence. It was also found that the aspect of flow separation in the wake region was changed by the opposing jet.
再使用ロケット逆噴射ジェットのPIV計測
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