关键词: 非线性声参量, 声速, 有机液, 有机混合液, 碰撞因子

Abstract:

Based on Schaafs’ultrasonic velocity-collision factor theory and in view of the relationship between the collision factor and the temperature and pressure of liquid,this paper deduces the expressions of acoustic nonlinear-ity parameter in organic liquid and organic liquid mixture.These expressions reveal the relationships between B/A parameter and the aspects such as the molecular repulsion force exponent and thermodynamic parameter of each component,as well as the external temperature and pressure of the medium.Thus,the B/A parameter of organic liquid mixture can be predicted without knowing the B/A parameter of each component.In addition,the internal con-struction information of organic liquid mixture can also be obtained by measuring the B/A parameter of the mixture.

Key words: acoustic nonlinearity parameter, ultrasonic velocity, organic liquid, organic liquid mixture, collision factor