US 12,454,902 B2
Exhaust gas assembly
Benjamin Cazzolato, Forestville (AU); Carl Quentin Howard, Grange (AU); Orddom Leav, Hampstead Gardens (AU); and Chris Turnbull, North Adelaide (AU)
Assigned to The University of Adelaide, Adelaide (AU)
Filed by The University of Adelaide, Adelaide (AU)
Filed on Sep. 11, 2024, as Appl. No. 18/882,494.
Application 18/882,494 is a continuation of application No. 17/276,047, granted, now 12,116,913, previously published as PCT/AU2019/000108, filed on Sep. 13, 2019.
Claims priority of application No. 2018903441 (AU), filed on Sep. 13, 2018.
Prior Publication US 2025/0003359 A1, Jan. 2, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. F01N 1/08 (2006.01); F01N 1/10 (2006.01); F01N 1/24 (2006.01); F01N 13/16 (2010.01); F02C 7/24 (2006.01); G10K 11/162 (2006.01)
CPC F01N 1/08 (2013.01) [G10K 11/162 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of reducing refracted sound from a power station, the power station comprising a gas turbine and an exhaust duct assembly having an exhaust gas outlet for exhausting exhaust gas into the atmosphere, the method comprising:
positioning an acoustic duct portion upstream of the exhaust gas outlet, the acoustic duct portion having a peripheral wall defining a through-passage arranged and constructed to promote propagation of sound there-through to atmosphere, the peripheral wall including an acoustically porous structure, and wherein the acoustic duct portion has a length (L) in a flow direction that is at least 50% of an average hydraulic diameter (DH) of the through-passage; and
operating the gas turbine,
wherein noise from the exhaust gas propagates through the acoustically porous structure to atmosphere so as to reduce refracted sound at locations downwind from the exhaust gas outlet.