Experimental Investigation of Lift Forces on Horizontal Cylinder near Bottom in Oscillating Flow

摘要

The lift forces on horizontal cylinder near bottom is experimentally investigated at Reynolds numbers (Re) in the range of 2 500～10 000 and Keulegan～Carpenter numbers (K_C) in the interval of 5～20, and gap ratio (e/D) is from 0.2 to 1.0. Lift force coefficient (C_L) and the deviation value of lift force (a~0) are analyzed by using the Fourier analysis method. It is found that both C_L & a~0 are the functions of the K_C number.