设计参数对流浆箱简化型方锥总管内流动特性影响的研究

Influence on flow characteristics in the simplified rectangular tapered header under several design parameters

为了研究设计参数对简化型方锥总管内流动特性的影响,采用数值分析的方法,研究了不同的总管长度、过渡管长度及总管入口流向的条件下简化方锥总管内的流动特性。结果表明:方锥总管的基于Baines方程的简化设计法,更适用于较短的总管,随着管长的增加,压力分布和支管束质量流量分布的均匀性明显变差;随着过渡管长度的增加,总管入口的流动稳定性更好,总管内压力分布和支管束质量流量分布也有一定改善;不同的进口流向对总管内压力分布和支管束质量流量分布影响较大,沿后壁流入总管明显要好于沿前壁流入。

In order to study the influence on flow characteristics in the simplified rectangular tapered header under design parameters, the flow characteristics in the rectangular tapered header was studied under different length of the header, different length of the transition tube and different flow direction to the inlet of the header by means of numerical simulation. The results show that the simplified design method by Baines formula of rectangular tapered header is suitable for the shorter header. With increase of the length of the header, the pressure and the mass flow rate out of the manifold tubes are more nonuniform. With increase of the length of the transition tube, the flow to the inlet of the header is more stable, the pressure in the header and the mass flow rate out of the manifold tubes get uniform, they are more uniform when the flow enters the inlet of the header along the back wall than along the front wall.