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METHOD FOR DETERMINING VACUUM RATE BY NON-LINEAR ACOUSTIC RESONANCE SPECTROMETRY IN A DIPHASIC MEDIUM AND APPLICATION IN A NUCLEAR REACTOR
METHOD FOR DETERMINING VACUUM RATE BY NON-LINEAR ACOUSTIC RESONANCE SPECTROMETRY IN A DIPHASIC MEDIUM AND APPLICATION IN A NUCLEAR REACTOR
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机译:二元介质中非线性声学共振光谱法测定真空度的方法及其在核反应堆中的应用
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摘要
A method of determining the void rate in a biphase gas/liquid medium, corresponding to the volume fraction of gas corresponding to the presence of bubbles in the liquid medium in a total volume of gas and liquid, comprises: deployment of a bulk elastic wave resonator in contact and coupled acoustically with the biphase medium; measurement by nonlinear resonant ultrasound spectroscopy of the biphase medium comprising the scanning in terms of frequencies and amplitudes in a given range of frequencies and in a given range of amplitudes, of bulk elastic waves emitted and detected at said resonator placed in said medium and leading a set of resonance curves exhibiting maxima; determination of a straight line defined by the set of maxima of said curves and of the slope of said straight line; determination of the void rate on the basis of said slope. The method may be applied to a nuclear reactor.
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