Numerical Investigation on Wake Characteristics of Underwater Vehicle Under Influence of Propeller
To better understand the wake evolution,the characteristics of the wake field of fully attached craft with propeller are numerically studied in this paper.Based on commercial software STAR-CCM+,a numerical model for the wake field of underwater vehicle is established by using virtual disk method,which can simulate the rotation effect of the propeller,and the wake characteristics is analyzed by using feature quantity comparison and data regression methods.Under the influence of propeller,the axial velocity distribution gradually develops into a jet-like cross-section distribution.The power-law relation of the maximum velocity increment in the far field is close to that of the circular tube jet,while the width of the semi-wake is close to that of the axisymmetric body.The occurring of self-similar characteristics for Reynolds stress undergoes a longer distance compared to that of axial velocity.After the formation of self-similarity,the cross-section velocity distribution is independent of the Reynolds number,while the starting position of the axial velocity self-similarity,the axial maximum velocity increment and the semi-wake width are affected by the Reynolds number.
PropellerVirtual disk modelUnderwater vehicleWake flowSelf-similarity
万方数据
维普
