作者:韩桂华 ， 陈林秋 ， 李大尉 ， 赵志伟， 赵恩玉
Authors:HAN Guihua , CHEN Linqiu , LI Dawei , ZHAO Zhiwei , ZHAO Enyu摘要:为了研究孔板空化器的孔数和孔板厚度对水力空化效果的影响 ,采用数值模拟的方法 ,通过压力、速 度、气含率云图确定了径向监测面;借助云图观察流场内气核的析出位置及压力与气含率的分布情况 ,并以气相质 量流率作为评判空化强度的标准定量分析孔板厚度、孔数在不同压差下对孔板空化特性的影响 。实验以纯水作为 介质 ,从水的电导率和温升的角度研究孔板空化特性 ,验证数值模拟的规律 ,在 0. 2 ~ 1 MPa 压差下的空化效果与 数值模拟相吻合 ,为同类空化器的设计及应用提供依据。
Abstract:In order to study the influence of orifice number and orifice thickness of orifice plate cavitator on hydraulic cavitation effect, the radial monitoring surface is determined by pressure, velocity and gas holdup cloud images using numerical simulation method. The precipitation position of gas core and the distribution of pressure and gas holdup in the flow field were observed by cloud images, and the influence of orifice plate thickness and number of holes on the cavitation characteristics of orifice plate under different pressure differences was quantitatively analyzed with the gas mass flow rate as the standard to evaluate the cavitation intensity. In the experiment, pure water was used as the medium to study the cavitation characteristics of orifice plate from the perspective of water conductivity and temperature rise, and the law of numerical simulation was verified. The cavitation effect under the pressure difference of 0. 2 - 1 MPa was consistent with the numerical simulation, which provided the basis for the design and application of similar cavitation devices.

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