F314 高エンタルピー流の吸収分光計測における飽和現象

概要

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It is important to measure thermo-chemical properties of arc-heater plumes for the development of Thermal Protection Systems for reentry vehicles. In our research, laser absorption spectroscopy was applied to measure the translational temperature of the argon-oxgen high enthalpy flow generated by an arc heater. And the translational temperature was also deduced from numerical codes. As a result, it was found that the transrational temperature deduced from OI 777.19nm absorption line was higher than that from ArI 840.82nm. Furthermore, the transrational temperature deduced from ArI 840.82nm was higher than that from numerical codes. Therefore, absorption saturation at high laser power has been investigated by using an argon discharge tube, and as a result, the absorption saturation was found easy to occur at ArI three absorption lines (840.82nm, 842.46nm, 852.14nm).
日本流体力学会の論文
2002-07-23