To investigate the flow field of the strut flameholder with integrated fuel injectors under different inflow conditions in an afterburner, numerical simulations were conducted using commercial software, and the actual flow field structures were obtained using PIV. Numerical simulation results shows that an increase in Mach number reduces the range of the recirculation zone downstream of the strut; Unstable double vortex structures occur under inflow conditions with temperatures above 900K and Mach numbers above 0.35; an increase of temperature slightly reduces the recirculation zone; and as the inflow angle increases from 5 ° to 15 °, the recirculation zone initially expands and then contracts. Experimental results show that as the inflow Mach number increases, the range of the recirculation zone gradu? ally narrows. Under inflow conditions of Ma=0.
15–0.35, two stable vortices exist in the flow field near the strut trailing, but at Ma=0.45, the double vortex structure loses stability; As the inflow deflection angle increases, the vortices on the upstream side gradually shrink and shift downstream, and the flow field structure exhibits a similar symmetry relationship under positive and negative deflection angles; When the strut trailing edge length changes, the length and width of the recirculation zone remain essentially unchanged. The flow field results obtained from numerical simulation and experimental testing exhibit consistent trends.