LDLIF/LT計測システムによる希薄気体流の計測と可視化

概要

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A combined technique of LDLIF (Largely Detuned Laser Induced Fluorescence) and LT (Life Time) is newly proposed to measure physical properties in rarefied gas flowfields and to visualize the flow at the same time. The LDLIF method is applied to determine the local density from the detected fluorescence intensity which is induced by a single mode laser with largely detuned frequency from the transition line center frequency, because the LDLIF intensity is directly proportional to the density. The LT method is selected to determine the temperature from the detected life time of the fluorescence, because the life time is only a function of temperature. The pressure is easily estimated from the equation of state. The experimental verification and the entire flowfield visualization are also carried out for supersonic free jets.
一般社団法人日本機械学会の論文
1994-09-25