Useful correlations were derived for the prediction of available gas holdup data in air-water systems, using the operational and geometric parameters of airlift reactors only. To successfully consider the geometric difference between various types of airlift reactors, the characteristic distance (D_ch) and the gas separation area (A_s) were defined as geometric parameters, respectively. The riser gas holdup (ε_r) in various types of airlift reactors was satisfactorily correlated with the operational and geometric parameters, such as the riser superficial gas velocity (U_Gr), a parameter containing the ratio of the top clearance to downcomer length (1+C_t/L_d), the characteristic distance to downcomer length ratio (D_ch/L_d), the downcomer to riser cross-sectional area ratio (A_d/A_r), the ratio of the gas separation area to riser cross-sectional area (A_s/A_r), and the bottom to downcomer cross-sectional area ratio (A_b/A_d). The downcomer gas holdup in various types of airlift reactors was well correlated by a nonlinear equation involving ε_r, D_ch/L_d, A_d/A_r, A_b/A_d, (1+C_t/L_d), and A_s/A_r.

仅使用空运反应堆的运行和几何参数，推导出了有用的相关性，用于预测空气-水系统中可用的气体滞留率数据。为了成功地考虑不同类型气升反应器之间的几何差异，分别定义了特征距离（D _ch）和气体分离面积（A _s）作为几何参数。各种类型的气升式反应器中的提升管气体滞留率 ( ε _r ) 与操作和几何参数令人满意地相关，例如提升管表观气速 (U _Gr )，该参数包含顶部间隙与下降管长度的比值 (1 +C _t /L _d)、特征距离与降液管长度比(D _ch /L _d )、降液管与立管截面积比(A _d /A _r )、气体分离面积与立管截面积比(A _s /A _r )，以及底部与降液管截面积比 (A _b /A _d )。各种类型气升反应器的降液管含气量与非线性方程密切相关，该方程涉及ε _r , D _ch /L _d , A _d /A _r , A _b /A _d , (1+C _t /L_d ) 和 A _s /A _r。