%A MA Lei, YANG Jun-hu %T Solving on Momentum Thickness for Cylinder Impeller %0 Journal Article %D 2005 %J Journal of Drainage and Irrigation Machinery Engin %R 10.3969/j.issn.1674-8530.2005.03.002 %P 6-10 %V 23 %N 3 %U {http://zzs.ujs.edu.cn/pgjx/CN/abstract/article_1166.shtml} %8 2005-05-25 %X The reynolds equation is given and the relevant quantities are analyzed. By type factors and transitional momentum integral equation, the approximate expression of momentum thickness is presented as well. The wake laws are applied to deduce relative expressions of turbulent boundary layer thickness; the expressions are regarded as the auxiliary relational expressions to solve momentum thickness. A method is presented that by boundary layer thickness coefficient k ¦Ä and momentum thickness ¦Ä 2 the fluid calculation without centrifugal force approaches the fluid calculation with centrifugal force gradually. These will be the basiso f further analysis oft hel ow-specific-speed centrifugalp ump.