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针对HR 2 0 0MW槽孔式水力驱动控制棒槽对孔处的阻力系数 ,在总结阻力系数经验公式的基础上 ,建立计算模型 ,推导出阻力系数公式 ,并进行了理论分析。分析结果表明 :阻力系数随槽与孔重合面积的增大而减小 ;步进缸内孔越大 ,阻力系数越小 ,但内孔增大到一定的值后 ,阻力系数趋近于某一个定值。为HR 2 0 0MW的工程设计奠定了理论分析基础
According to the empirical formula of drag coefficient, a calculation model is established for the resistance coefficient of rod groove to hole of HR 200 mm slot hydraulic drive control rod. The drag coefficient formula is deduced and the theoretical analysis is made. The results show that the drag coefficient decreases with the overlapping area of the groove and the groove. The larger the diameter of the step cylinder is, the smaller the drag coefficient is. However, after the bore increases to a certain value, the drag coefficient approaches one Value. Laid the theoretical foundation for the design of HR 200MW