Investigation of the flow and heat transfer characteristics in advanced vortex combustor

Abstract

In order to investigate the flow and heat transfer characteristics in advanced vortex combustor(AVC), numerical analysis of multi-field synergy on combustion flow has been performed. The results show that the region with smaller field synergy angle β between velocity and temperature gradient is mainly distributed behind the blunt body, in the cavity and in inlet channel. The synergy degree between velocity field and the temperature field is well. With the increase of the inlet velocity, total pressure loss increases from 0.04 to 4.61, angle ϕ between pressure gradient and velocity gradient increases 42.93°–50.65°, angle α between velocity and velocity gradient, angle θ between velocity and pressure gradient, and angle β decrease, angle γ between temperature gradient and velocity gradient increases, but the variation of these variables is small. With the increase of inlet temperature, total pressure loss decreases from 1.09 to 0.03, α and θ increases, but α increases from 68.58° to 72.9°, ϕ, β and γ decrease, but ϕ decreases from 46.11° to 43.68°. With the increase of wall temperature, α and θ decreases, but total pressure loss, β, ϕ and γ increase to some extent. For the turbulence flow field in AVC, By increasing inlet velocity and wall temperature, and reducing inlet temperature, the heat transfer power consumption can be reduced, but the flow and heat transfer can be strengthened, and the comprehensive performance of heat transfer enhancement can be improved.