電気推進機推進剤流れの希薄動圧ベクトル計測

抄録

In the research and development of electric propulsion, it is important to evaluate the propellant flow within ground test facility (vacuum chamber), however it is difficult to measure due to the rarefied pressure and the low particle velocity. In this paper, a rarefied dynamic pressure detector with a straight optic fiber as a detection string was proposed. Through the experimental evaluation, it was confirmed that its dynamic pressure resolution was approximately 1.0 × 10-5 Pa, that the propellant flow within a vacuum chamber was appropriately measured, and that the compensated propellant flow was obtained with the preliminary evaluation of the pumping flow.