摘要
针对目前声速模型存在参数难以确定，不能同时适用于气液两种相态等问题，通过分析压力、声速及温度三者的关系，基于PR状态方程开发了声速的新计算模型。在温度为273～364K，压力为0．1～96．5MPa的范围内，利用该模型对水介质中总共124个声速数据点计算的总平均误差为0．61％；乙醇介质中总共48个声速数据点计算的总平均误差为0．53％；对水和乙醇混合物中总共79个声速数据点计算的总平均误差为3．16％。通过和wilson声速模型的预测误差对比，得出PR声速模型预测精度较好。
In view of undeterminable parameters and inadaptability to both gas and liquid in existing acoustic velocity models, a new sound velocity model based on PR EOS has been established by analysing relationship between pressure, speed of sound and temperature. In a temperature range （from 273 K to 364 K） and a pressure range （from 0.1 MPa to 96.5 MPa）, the velocites of sound in water and ethanol are calculated respectively. The research showed that the mean error of 124 date points is 0.61% in water, the mean error of 48 data points is 0.53% in ethanol, and in mixture of water and ethanol the mean error of 79 data points is 3.16%. Compared with the Wayne D. Wilson equation of acoustic velocity, a significant improvement is shown in precision.
出处
《青岛大学学报（工程技术版）》
CAS
2007年第3期73-76,81,共5页
Journal of Qingdao University(Engineering & Technology Edition)
关键词
流体声速
声速计算模型
PR状态方程
fluid velocity
computation module of acoustic velocity
PR state equation
