Kazuhiko Yamada

The aerodynamic force enhancement effect occurs by applying magnetic field around a reentry vehicle in a weekly-ionized flow behind the strong detached shock wave. Recently, this force enhancement effect was experimentally investigated using an expansion tube which can produce high speed and high enthalpy flow. Because aerodynamic force measurement is difficult due to short test flow period in expansion tube, drag measurement system which employed a piezofilm with fast responsiveness was developed in this study. This drag measurement system was calibrated using CO2 pulse laser and applied to experimental investigation on the aerodynamic force enhancement effect in expansion tube. The aerodynamic force acting on simple models in the flow produced by the expansion tube can be measured in this system. Additionally, the increase of the drag force due to magnetization in a weekly-ionized flow was observed.

大気球シンポジウム 平成26年度（2014年11月6-7日. 宇宙航空研究開発機構宇宙科学研究所 (JAXA)(ISAS)）, 相模原市, 神奈川県資料番号: SA6000021008レポート番号: isas14-sbs-008

43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011 (July 7-8, 2011. Waseda University, International Conference Center), Tokyo JapanFor a high-enthalpy flow, it has been suggested that shock layer formed by the body in a weakly-ionized flow is enhanced as a result of the interaction between a magnetic field applied to the body and the flow. According to the theory, the scale effect of the interaction is organized by the interaction parameter defined by the ratio of the magnetic force to inertial force of the flow, which includes not only the intensity of the applied magnetic field but also the flow parameters such as density. In this study, the scale effect of the interaction is investigated experimentally, by varying not only the intensity of the applied magnetic field but also other parameters. For this purpose, the high-enthalpy flow generated in the expansion tube is employed. It was confirmed that the influence on the shock layer by the interaction is almost proportional to the interaction parameter as the theory suggests.Physical characteristics: Original contains color illustrations