Abstract: The energy collecting ring is the key to achieve higher thermal efficiency. The multi scheme design of the energy collecting ring of a certain type of burner is studied by experiments and numerical simulation. The results show that the thermal efficiency of the energy collecting ring with double-layer convex shaped can be increased by about 10% compared with the case without energy collecting ring. Compared with the energy collecting ring with double-layer concave shaped, the thermal efficiency of the energy collecting ring with double-layer convex shaped can be increased by about 3%. At the same time, the influence of the key design parameters of the energy collection ring on the thermal efficiency and CO emission is analyzed.

Key words: Numerical simulation, The energy collecting ring, Double-layer convex shaped, Thermal efficiency, CO emission