極短時間内での大型スクラムジェット模型の力計測(流体工学,流体機械)

概要

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Aerodynamic force measurement technique was developed for large scramjet models within short test time. The technique was based on direct acceleration measurement with miniature accelerometers mounted on a test model, which was suspended with stainless steel wires to make the restorative force negligible. In order to cancel the natural mode of vibrations of the test model, sum-averaging signal processing technique was proposed. The technique was applied on drag force measurement of a 3m length rectangular duct scramjet in the high enthalpy shock tunnel HIEST. Measurement result was evaluated with a three-dimensional Navier-Stokes numerical simulation. The evaluation with numerical simulation showed that the difference between measurement and numerical simulation is less than 5%. It is demonstrated that the technique has sufficient reliability to measure aerodynamic force with time resolution of 350μs, which is equivalent to frequency response of 2.88kHz.
一般社団法人日本機械学会の論文
2005-06-25