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DIRECT VELOCITY MEASUREMENTS IN LOW-DENSITY PLASMA FLOWS

机译:低密度等离子体流中的直接速度测量

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The flow velocity is measured directly in a direct-current arc jet by cre¬ating a luminous disturbance in the flow and measuring its time of flight over a known distance with photoelectric detectors. This technique is applicable to flows with high stagnation temperatures and low discharge pressures. Measure¬ments made in supersonic flows without arc heating correlated well with veloci¬ties computed from pressure probe measurements. Measurements made in supersonic plasma flows exhibited good repeatability at static pressures well below 1 mm Hg.

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