作　　者： ; ;

机构地区： 广东石油化工学院

出　　处： 《广西大学学报（自然科学版）》 2013年第2期332-338,共7页

摘　　要： 针对方形锥管布浆器布浆不均匀的特性,提出一种基于CAD/CFD(计算机辅助设计和计算流体动力学)一体化的方锥形总管结构优化设计方法,以探寻方锥总管的合理结构形式。该方法整合了几何体设计、网格划分、数值求解过程,通过布浆支管束质量流量输出结果与设计目标的对比评价,依据流动中流体速度与压力之间所满足的伯努利方程关系,不断调整几何体的设计参数———方锥形布浆总管后壁高度hi(x),重复几何体设计、网格划分及数值计算过程,直至满足设计目标。结果表明,结构优化设计后总管的后壁形状是一条复杂曲线,在总管大端及回流端与简化型总管后壁相比有明显差别。总管内压力分布更为均匀,各支管对应位置的压力接近水平线型分布。支管束的质量流量分布与期望值线更为接近,质量流量偏差均小于1%。 Aimed at its nonuniform distribution characteristic, a new structure design method of rec- tangular tapered header based on CAD/CFD （computer aided design/computational fluid dynamic） integration was apphed to study its reasonable structure. The method integrates modeling geometry, meshing volume and numerical computation. With this method the design parameters, the height of backwall of the header, hi （x）, repeated geometry design, mesh volume, and numerical computa- tion, could be adjusted automatically by comparing the output of mass flow rate from branch pipes and that of designed target flow, and by Bernouli＇s equation which relates the fluid velocity and pres- sure, to achieve optimized parameters. The results showed that the shape of backwall of the rectan- gular tapered header was a complicated curve that was obviously different from the simplified header at the area of the inlet and the reflux. The pressure distribution in the optimally designed header was more uniform and the pressures nearly a horizontal line. The mass flow rate distribution out of the branch pipes was more uniform and was closer to the expected value curve. The deviation of the mass flow rate in every branch pipe was less than 1%.

关 键 词： 布浆器 方锥形总管 一体化 结构优化设计 数值分析

领　　域： [轻工技术与工程]