离心式固液两相流泵扬程的改进算法

Improved lift calculation method for solid-fluid two-phase flow centrifugal pump

为推导出改进的两相流泵的扬程计算公式,分析了离心式固液两相流泵泵内的固相颗粒的运动,对其进行受力分析并建立固体颗粒运动方程,继而得出了固相影响因子的表达式,并利用余刚等人所总结的经验系数,对固相影响因子进行求解.该公式表达形式上较传统离心式固液两相流泵的扬程计算公式更为简捷,更有利于工程推广.通过与参考文献中提供实测数据对比分析,该计算公式所计算扬程与实测值规律吻合,且误差基本在1.2%内,计算出的浆体扬程准确度高,相对误差很小且稳定,表明所推导的离心式固液两相流泵计算方法具有一定的工程实用价值.

In order to deduced the improved calculation formula of two-phase flow pump＇s lift, this paper analyzed the motion of solid particles in solid-fluid two-phase centrifugal flow pump and the forces on solid particles, established the solid particle＇s motion equation, then concluded expression of the improved solid-phase of impact factors. This study used the empirical coefficient which was concluded by Mr. Yu Gang et al to calculate the solid impact factor. Compared with the traditional centrifugal solid-liquid two phase flow pump lift calculation formula, this formula expressing form is simpler, more conducive to engineering. Compared with the measured data in the analysis provided by the references, the calculative lift through calculation formula accord with the actually measured value, and the head and basic error within 1.2%, the accuracy of the slurry lift calculation is high, the relative error is small and stable. The result of this study suggests that calculation method of the centrifugal pump solid-liquid two-phase flow derived by this paper has some practical value in engineering.