控制阀对射流泵抽真空过程影响的仿真研究

Simulation and Research on Impact Control-Valve on the Process of Injector Vacuum-Pumping

针对矿井自动排水系统中提高射流泵效率的途径,分析控制阀对射流泵抽真空过程的影响。利用流体力学软件FLUENT,以井下常用的喷嘴直径为8 mm的DN25 mm射流泵为例,在控制阀不同通径面积的情况下,对射流泵进行了内部流场仿真模拟和试验分析。由分析结果可知,当控制阀的通径面积与喷嘴通径面积之比大于1.5时,建立抽真空所需压力的时间较长。如果面积比大于2时,即可建立抽真空所需压力,时间也较短,此结论为控制阀的设计提供了理论依据。

Be aimed at improving the efficiency of injector in mine automatic drainage system, the influence of control-valve on the process of injector vacuum-pumping was analyzed.Using the common DN25 mm injector which nozzle diameter was 8 mm as an example, the hy- drodynamics software FLUENT was used to carry out simulation of internal flow field of injector with the different flow area of the control valve,and some experiments were done.From the analysis resuhs,a conclusion could be got,when the control valve path area and nozzle path area ratio greater than 1.5, vacuum pressure values for a longer time could be established;when the area ratio greater than 2, it would have a shorter time.This conclusion provides theory basis for the design of the control valve in the future.