It is a well known approach that having bluff bodies in tandem will comparatively reduce the drag generated by single bodies. Several experimental and numerical results in the past have proved this phenomenon of drag reduction due to flow interference and patterns of vortex shedding. A V shaped gutter is being used in afterburner of an aircraft gas turbine engine which serves to hold the flame when the afterburner is switched ON. But when the burner is switched OFF the presence of gutter offers excess drag and total pressure loss. Hence it is necessary to reduce the total pressure loss and drag generated by the gutter. In this work an attempt has been made to understand the flow physics involved in keeping bodies in tandem and the effect of change in drag coefficient. Several types of cross section of bodies are investigated both upstream and downstream of the gutter and the drag coefficient is calculated. The flow simulation is done using CFD-ACE+, -6 is taken for the solution to converge. The gutter and bluff bodies are considered as wall and the drag coefficient is calculated by summing up pressure and shear forces to calculate the drag force and using the equation 1. The fig 1 shows the computational model chosen for the analysis. The duct model surrounding the gutter is considered to be same in geometry as that of afterburner and a cyclic symmetry boundary condition is applied to the side walls. The analysis is carried out for flow conditions as shown in the table and for different configurations of bluff bodies in tandem as shown in figure.