CAJ | 학술논문

研究了超声衰减谱法和相速度测量高浓度多分散脂肪两相乳浊液的粒径分布问题.在理论分析基础上,实验测量了多个浓度(2%～20%)脂肪乳试样在2～13 MHz频带下超声衰减和相速度谱,结合反演算法由实验数据计算出乳浊液颗粒的粒径分布,并讨论了相速度法的意义和特点.将原始浓度(20%)下测得粒径分布与消光法在稀释条件下相同试样测量结果作对比,二者比较吻合,表明超声谱法可在无稀释的高浓度条件下作乳浊液粒径分布的表征.
연구료초성쇠감보법화상속도측량고농도다분산지방량상유탁액적립경분포문제.재이론분석기출상,실험측량료다개농도(2%～20%)지방유시양재2～13 MHz빈대하초성쇠감화상속도보,결합반연산법유실험수거계산출유탁액과립적립경분포,병토론료상속도법적의의화특점.장원시농도(20%)하측득립경분포여소광법재희석조건하상동시양측량결과작대비,이자비교문합,표명초성보법가재무희석적고농도조건하작유탁액립경분포적표정.
Characterizations of particle size distribution(PSD)in concentrated fat emulsions are investigated with ultrasonic attenuation and phase velocity spectrum methods.Based on theoretical analysis and numerical results.measurements of ultrasonic spectrum over a frequency range of 2～13MHz are carried out with oil volume fractions from 2% to 20%.Combined with the inverse algorithm,fat droplet size and distribution are determined from experimental data.The significance of phase velocity as a complemental means is presented.Comparisons with results of light extinction method indicate ultrasonic spectrum method could produce consistent PSD results.Moreover,it allows a non-destructive test for high concentration emulsions.