基于Fluent软件的泵前进气管内部流场模拟

Flow field simulation of pump front intake manifold based on Fluent software

利用Fluent软件,对气浮装置中设置在溶气泵前进水口上的泵前进气管内部结构进行了流场模拟,计算得到了压力云图,速度云图和相分布图,进而获得泵前进气管内部的压力变化、速度变化及相变化情况。通过综合分析,泵前进气管内部压力均会逐渐降低,而速度则会逐渐增大,导致负压区的出现,说明泵前进气管具有吸气能力,而相分布图则证明了泵前进气管内气相的存在。根据分析结果,对泵前进气管结构做了一定优化,而优化后装有节流口的泵前进气管负压区范围明显较大,气相分布较为均匀,说明其吸气性能较好;而泵前进气管入口速度的改变,则证明了入口速度的提高会促使泵前进气管内部负压区范围的扩大,从而提升吸气性能。

Using the Fluent software,the flow field simulation of the internal structure of the intake pipe installed in front of the dissolved air pump of air flotation device was carried out,and the pressure cloud map,velocity cloud map and phase distribution map were calculated to obtain the pressure change,velocity change and phase change inside the intake pipe.Through comprehensive analysis,the internal pressure of the intake pipe would gradually decreased,and the speed would gradually increased,resulting in the occurrence of negative pressure zone,indicating that the intake pipe had the suction capacity,and the phase distribution diagram proved the existence of the gas phase in the intake pipe;according to the analysis results,the structure of the intake pipe had been optimized,and the range of the negative pressure zone of the intake pipe equipped with the throttle port was obviously larger,and the gas phase distribution was more uniform,indicating that the suction performance was better;the change of the inlet speed of the intake pipe proved that the increase of the inlet speed would promoted the expansion of the negative pressure zone inside the intake pipe,thereby improving the suction performance.