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在水模型上采用电探针方法测定了喷吹过程气液两相区内的气泡频率分布和含气率分布。用多元回归的结果,证实上述两种分布都可以用正态高斯分布近似拟合。进一步的数学推导给出了气泡尺寸和气泡频率及含气率间的关系,并证实气泡尺寸的空间分布也可由正态高斯分布近似拟合。在上述工作的基础上,推导得到了计算喷吹过程气液相接触面积的积分式,并在计算机上求解得到了九组实验条件下的气液相接触面积值。计算机多元回归的结果,说明喷吹过程气液相接触面积可用下列无量纲准数方程计算: (1)式可简化为下边的形式: 通过向NaOH水溶液中喷吹CO_2气体对上述公式进行了校验。校验结果说明,(1)、(2)两式对于计算喷吹过程气液相的接触面积,具有较好的实用价值。
In the water model, the electric probe method was used to determine the bubble frequency distribution and gas content distribution in the gas-liquid two-phase region during the blowing process. Using multivariate regression results, it is confirmed that the above two distributions can be approximated by normal Gaussian distribution. Further mathematical derivation gives the relationship between bubble size and bubble frequency and gas content, and confirms that the spatial distribution of bubble size can also be approximated by normal Gaussian distribution. Based on the above work, the integral formula for calculating the contact area of gas-liquid phase in the injection process was deduced, and the contact area of gas-liquid phase under the nine experimental conditions was solved by computer. The result of multiple regression of the computer shows that the gas-liquid contact area of the injection process can be calculated by the following non-dimensional standard equation: (1) The equation can be simplified to the following form: The above formula is carried out by blowing CO 2 gas into NaOH aqueous solution Test The verification results show that (1) and (2) are of good practical value for calculating the contact area of gas-liquid phase during the blowing process.