【作者】 黄永华； 陈国邦； 李祥仪；

【Author】 Huang Yonghua Chen Guobang Li Xiangyi (Cryogenics Laboratory , Zhejiang University, Hangzhou 310027)

【机构】 浙江大学制冷与低温研究所；

【摘要】 采用非线性最小二乘回归方法拟合3He饱和区气液密度实验数据,提出精度满足要求的3He气液饱和密度方程,该方程在实验点上的平均相对偏差为0．79％,最大相对误差为7．46％,相对误差超过2．5％的数据点有6个。该方程不仅可以用来计算饱和区气液密度,而且对将来产生3He气态和液态区的状态方程具有重要意义,为物性计算提供可靠的初值。更多还原

【Abstract】 An accurate density equation for saturated 3He was obtained by using nonlinear regression for collected experimental data. The average relative error of this equation is 0.79%, while the maximum relative error is 7.46%. There are only 6 points out of 81 with the relative error above 2.5%. This equation not only can be used to calculate saturated density of 3He, but also has a great significance in generating the equation of state for 3He in both liquid and gas regions, which is still blank up to now.更多还原