孔板为发生器的水力空化装置的实验研究

Experimental Study on Equipment of Hydrodynamic Cavitation Based on Perforated Plate as a Generator

孔板是以多洞孔板为水力空化发生器的水力空化装置的关键，孔板的参数如：开孔孔径、开孔个数、孔排布方式、孔板厚度对空化效果有着重要的影响。文章分析了孔板的开孔率及孔的排布方式（分为均布和辐射状分布）2个因素对孔板前压力、孔板前后压差的影响，结果表明：在开孔率相同的情况下，通过改变孔的排布方式可以显著改变管路的最大流量，在开孔率为0.035时，均布排布较辐射状排布时的管路最大流量增大至0.8m^3／h；在开孔率为0.042时，在特定的流量范围11.5-12.5m^3／h之间时，随孔的3种排布方式（均布、辐射状分布12×4、辐射状分布16×3）的不同，孔板前压力、孔板前后压差有明显的变化。

The perforated plate is key to the equipment of hydrodynamic cavitation which applies the multiple hole orifice as generator,the parameters of the perforated plate, such as the diameter of hole, the number of holes,the distribution of holes, plate thickness, play very important role in the effect of cavitation. In this paper, the effect of the perforating ratio and the distribution of holes—the uniform distribution and the radiation distribution—to the inlet pressure and pressure-difference in front and behind of perforated plates are analyzed, the experimental results indicated that.with the same perforating ratio, the maximum discharge in the pipeline changed remarkably with the change of the hole configuration,with the perforating ratio is 0.035,the maximum discharge in the pipeline of uniform distribution increased to 0.8 m^3/h than that of radiation distribution; with the perforating ratio is 0. 042 and discharge in the range from 11.5 to 12.5 m^3/h,the change of the inlet pressure and the pressure difference of perforated plates is distinct with the three distributions of holes which are the uniform distribution;the radiation distribution of 12×4 and the radiation distribution of 16×3.