大尺度水体对于固态悬浮质的传递特性

The Transfer Characteristics of Large Scale Water Flow with Respect to Suspended Solids

为了解决初值不恒定,边界可变形的多相流传质问题,本文首先建立了便于分离变量的对比态方程作为迭代逼近的第一步以寻求输沙能力Q_(s0)与排水流量Q_0,进水含沙量S_i和水力比降J之间的相关函数П。继而论证了幂函数П的极值所在域与对数函数InП的极值所在域在Q_(s0),Q_0,S_i和J多维空间中的重合问题。从而通过矩阵运算求得在单一断面滞洪水库(漫流冲淤)条件下,Q_(s0)∞Q_0^(1.46)S_i^(0.712)J^(1.26)。在复式断面(高滩深槽运用水库)条件下,Q_(s0)∞Q_0^(0.83)J^(1.54)。文中列举了国内外实测结果以资比较验证。最后导出传递函数以便推广应用。

As the first stcp in iterativc approach to mass transfer ability problem in multiphasc fluid flow with unstcady initial valuc and dcformablc boundary, the corrcsponding statcs cquation was cstablishcd in tcrms of scparablc variablcs to scek for the corrclation function П=F(Q_(so), Q_o, Si, J) here, Q_(so) being the disehargc ratc of suspcndcd solids, Q_o the discharg rate of mixed liquid, S_i the concentration of suspendcd solids in mixed liquid, J the hydraulic slope in the reach between inlet and outlet of flow. The coincidence of extremum domain of 11 and that of InП in multi-dimension space was verified, then Q_(so)∝Q_o^(1.46) S_i^(0.712) J^(1.26) for flat bed reservoir, Q_(so)∝_o^(1.22) S_i^(0.83) J^(1.54) for deep channel reservoir, have been obtained respectively. Data of field field observations and laboratory experiments have been cited for comparison. The transfer function of large scale water flow with respect to suspended solids was deduced finally.