基于MATLAB的声场作用仿真分析

Simulation Analysis of Sound Field Action Based on MATLAB

管道原油中(尤其是稠油)的蜡沉积现象是长期困扰原油生产和运输的一个难题,因此管道原油降粘除蜡在原油管道输送过程中非常必要。超声波是一种有效的降粘、除蜡方法,为了增大管道内声场覆盖范围、声场强度,提出阵列式超声波清蜡方法,给出了超声波阵列结构,讨论了超声探头与管道耦合的方式,深入分析了2*2型与3*3型两种阵列结构的特性。通过Matlab仿真工具对单个超声探头、2*2型与3*3型阵列结构的声场模型进行声物理场的远场、近场数值仿真,仿真结果显示:声波频率为20kHz时的超声空化作用最优,2*2型与3*3型有效声场范围大小几乎一致,但2*2型声强的高强度范围更大。研究结果对阵列超声结构布局和工作参数的选择有着指导作用。

Wax deposition in pipeline crude oil(especially heavy oil)is a difficult problem for crude oil production and transportation for a long time,so it is very necessary to remove wax from pipeline crude oil.Ultrasonic wave is an effective method to reduce viscosity and remove wax.In order to increase the coverage and intensity of sound field in pipeline,an array ultrasonic wax removal method is proposed in this paper.The ultrasonic array structure is given.The coupling mode between ultrasonic probe and pipeline is discussed.Through Matlab simulation tool,the acoustic field model of single ultrasonic probe,type 2*2 and type 3*3 array structure is simulated by far-field and near-field numerical simulation.The simulation results show that the ultrasonic cavitation is optimal when the acoustic frequency is 20KHz,the range of effective sound field is almost the same as that of type 2*2,but the range of high intensity of type 2*2 sound intensity is larger.The results can guide the selection of ultrasonic structure layout and working parameters.