水力旋流器能耗机制与节能原理研究 Ⅲ.湍流压力场脉动结构

Researches on energy consumption mechanism and energysaving principles in hydrocyclones.[HT8.,7.SS]Ⅲ.Fluctuating characteristics of the turbulent pressure distribution.

采用电阻应变式压力测定仪及在线数据自动采集与实时处理系统，在国内外首次对水力旋流器内湍流压力场的脉动结构进行了系统的实测研究。结果表明，在溢流管端以下内旋流区域中，流体的压力脉动强度以及压力相对脉动强度均很大，该区域是一个湍动能量损失严重的区域；水力旋流器中绝大部分区域内的脉动压力均服从Ｇａｕｓｓ分布；但在柱段区域的个别地方以及锥段上部内旋流区域的许多地方，脉动压力则拒绝Ｇａｕｓ假设，在这些部位湍流具有明显的间歇性特征。

The fluctuating characteristics of the turbulent pressure distribution in a hydrocyclone were systematically measured and studied for the first time at home and abroad by using a resistance strain pressure analyser and an oinline automatic data collecting and timely processing system.The result shows that compared with the fluctuating strength,the pressure fluctuatng strength and the pressure of the liquid were very high in the internal swirl area below the top of the overflow tube,the turbulent energy loss was serious in the area,the fluctuating pressure in most area of the hydrocyclone submitted to Gauss distibution;the fluctuating pressure denied Gauss hypothesis in a few areas of the column section and many areas of the internal swirl at the top of cone section,the turbulence had evident intermittent characteristics in locations.