A STUDY ON THE TWO-DIMENSIONAL SIMILAR VELOCITY DISTRIBUTION IN THE TURBULENT WAKES

Abstract

Approximate methods based on the experimental assumptions are often carried out to predict a turbulent flow on account of difficulties obtaining a general solution of the Navier-Stokes equation of motion. In this report, after deciding the distribution of integral scale of turbulence and assuming a one parameter turbulent model, calculations were done according to Spalding's finite differential-difference methed based on the equation of turbulent energy transfer to obtain an asymptotic distribution of velocities and turbulent energy in the downstream of a two-dimensional body placed normal to a uniform flow. Comparing the results with experiment, it became clear that Spalding's numerical method is also applicable to predict a two-dimensional wake, and that a similar solution is obtainable assuming the integral scale of turbulence to be proportional to the width of wake.