%0 Journal Article
%A FU Ming-huan
%A LU Zhi-nan
%A HUI Xiang-ming
%A ZHENG Yan
%A SUN Pei-xue
%T Deduction and Verification of the Calculation Foumula for  Lengthof Abruptly Expanding Hydraulic Jump
%D 2017
%R 10.11988/ckyyb.20160088
%J Journal of Yangtze River Scientific Research Institute
%P 48-51
%V 34
%N 4
%X As an important parameter for the design of abruptly expanding stilling basin, length of hydraulic jump has remarkable effect on the  safety, stability and economy of the stilling basin. The  variation of length of hydraulic jump in  abruptly expanding stilling basin was  researched  through establishing motion equations of flow particle in hydraulic jump zone. Furthermore, a half-theoretical formula for the hydraulic jump length was put forward and  measured data from existed literatures was employed to verify the formula. Result shows that  the length of hydraulic jump is the function of four  parameters, namely upstream Froude number, upstream mean flow depth, conjugate water depth ratio and abrupt enlargement ratio. With the increase of the four  parameters, the length of hydraulic jump increases. The mean error of length of hydraulic jump calculated by the proposed equation is 4.32%. Among 48 working conditions of five patterns, the  relative errors of only five  conditions exceed 10%, with the maximum value of -12.5%.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20160088