Impingement cooled liner for dry low NOx venturi combustor

Details Impingement cooled liner for dry low NOx venturi combustor Impingement cooled liner for dry low NOx venturi combustor

1986-11-25

1991-01-15

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Combustion products generator

60757, F02G 100

Patent

active

049844296

ABSTRACT:
It has been found that in a dry low NOx combustor of the type having an upstream combustion chamber and a downstream combustion chamber interconnected by a venturi section, the fuel-air ratio and uniform fuel-air mixing can be improved by providing an annular shield upstream of the venturi region. The shield is impingement cooled through the venturi and provision is made for dumping cooling air farther downsteam in the downstream combustion chamber. With the aforesaid improvements in mind, the upstream combustion chamber is provided with first and second inner liners which are also impringement cooled an which provide combustion air farther upstream into the upstream combustion chamber to further improve fuel-air mixing and to maintain the desired fuel-air ratio.

REFERENCES:
patent: 3905192 (1975-09-01), Pierce et al.
patent: 4109459 (1978-08-01), Ekstedt et al.
patent: 4292801 (1981-10-01), Wilkes et al.
patent: 4480436 (1984-11-01), Maclin
patent: 4555901 (1985-12-01), Wakeman et al.
patent: 4567730 (1986-02-01), Scott
Nealy, D. A. Reider, S. B., "Evaluation of Laminated Porous Wall Materials for Combustor Liner cooling"; Transactions of the ASME, vol. 102, pp. 268-269, Apr. 1980.

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