CAJ | 학술논문

超声波在颗粒两相体系中传播，包含了大量颗粒粒径信息，结合理论模型，通过提取超声波有效衰减谱和相速度谱分析了颗粒的粒径分布。实验中，对体积分数为10%的3种不同粒径分布的聚苯乙烯-水悬浊液，通过双样法和插入取代法(单样法)分别获得宽带超声波衰减谱与相速度谱，以ECAH模型为理论基础，并分别用Twomey、ORT和Davidon-Fletcher-Powell优化算法，反演出悬浊液颗粒粒径分布。测量结果与显微镜图像法结果进行对比，中位径误差小于15%，表明了利用超声波衰减谱法（UASA）和相速度谱法（UPVSA）测量悬浊液颗粒粒径分布的可行性与可靠性。
초성파재과립량상체계중전파，포함료대량과립립경신식，결합이론모형，통과제취초성파유효쇠감보화상속도보분석료과립적립경분포。실험중，대체적분수위10%적3충불동립경분포적취분을희-수현탁액，통과쌍양법화삽입취대법(단양법)분별획득관대초성파쇠감보여상속도보，이ECAH모형위이론기출，병분별용Twomey、ORT화Davidon-Fletcher-Powell우화산법，반연출현탁액과립립경분포。측량결과여현미경도상법결과진행대비，중위경오차소우15%，표명료이용초성파쇠감보법（UASA）화상속도보법（UPVSA）측량현탁액과립립경분포적가행성여가고성。
Ultrasonic wave usually contain abundant particle size information when it passes through particulate two-phase flow. With the help of theoretical interpretation, particle size distribution (PSD) can be obtained by extracting effective attenuation and phase velocity spectra. Experiments were carried out to measure the particle size distribution of three kinds of aqueous polystyrene suspension samples with volume fraction of 10%. Attenuation and phase velocity spectra were acquired respectively by double-sample and insert-substitution methods. Furthermore, based on the ECAH model, the Twomey, ORT and an optimization method (Davidon-Fletcher-Powell algorithm) were used to inverse the particle size distribution of suspensions. The ultrasonic measurement results illustrated good consistence with those from microscope image analysis with deviation less than 15%, which indicated that measuring the particle size distribution of suspension with both ultrasonic attenuation and phase velocity spectra was feasible and reliable.