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A swirled diffusion dump combustor of the present invention includes a cylindrical combustor can and a fuel and air mixer attached to the upstream end of the combustor can. The mixer is generally formed by an annular chamber which is defined between annular outer and inner walls, having an annularly

A swirled diffusion dump combustor of the present invention includes a cylindrical combustor can and a fuel and air mixer attached to the upstream end of the combustor can. The mixer is generally formed by an annular chamber which is defined between annular outer and inner walls, having an annularly continuous truncated conical crass-section. The upstream end of the annular chamber is closed by a manifold ring which includes an annular fuel passage and two rows of swirled air passages. Thus, the compressor air approaching the mixer from above enters the swirled air passages, and the swirled air flow in the annular chamber shears fuel from the lips of the annular fuel passage to produce a fuel/air mixture. The mixture swirl is accelerated in the annular chamber and passes a downstream annular passage which serves as the region of diffusive mixing, and also as a flame flashback restrictor. The flow then dumps into the combustor can, providing the final level of mixing, where it then burns. The burning fuel/air mixture is stabilized by the swirling flow from the swirled air passages, as well as by the pressure gradient induced re-circulation to the upstream end of the combustor can. The front face of the combustor can is cooled by compressor air flowing through a series of effusion holes and the cylindrical side wall of the combustor can is cooled by air flow through an impingement cooling skin.

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A swirled diffusion dump combustor of the present invention includes a cylindrical combustor can and a fuel and air mixer attached to the upstream end of the combustor can. The mixer is generally formed by an annular chamber which is defined between annular outer and inner walls, having an annularly

A swirled diffusion dump combustor of the present invention includes a cylindrical combustor can and a fuel and air mixer attached to the upstream end of the combustor can. The mixer is generally formed by an annular chamber which is defined between annular outer and inner walls, having an annularly continuous truncated conical crass-section. The upstream end of the annular chamber is closed by a manifold ring which includes an annular fuel passage and two rows of swirled air passages. Thus, the compressor air approaching the mixer from above enters the swirled air passages, and the swirled air flow in the annular chamber shears fuel from the lips of the annular fuel passage to produce a fuel/air mixture. The mixture swirl is accelerated in the annular chamber and passes a downstream annular passage which serves as the region of diffusive mixing, and also as a flame flashback restrictor. The flow then dumps into the combustor can, providing the final level of mixing, where it then burns. The burning fuel/air mixture is stabilized by the swirling flow from the swirled air passages, as well as by the pressure gradient induced re-circulation to the upstream end of the combustor can. The front face of the combustor can is cooled by compressor air flowing through a series of effusion holes and the cylindrical side wall of the combustor can is cooled by air flow through an impingement cooling skin. he downstream-side exhaust gas sensor and the intermediate target value. At least one of an update amount and an update rate of the intermediate value, a control gain, a control period and a control range of a sub-feedback control is varied. -4801014, 19890100, Meadows; US-4810109, 19890300, Castel; US-4835834, 19890600, Weder; US-D301991, 19890700, Van Sant; US-4918861, 19900400, Carpenter; US-4941572, 19900700, Harris; US-4946290, 19900800, Matyja; US-4980209, 19901200, Hill; US-4989396, 19910200, Weder et al.; US-D315700, 19910300, Stephens; US-5073161, 19911200, Weder et al.; US-5074675, 19911200, Osgood; US-5105599, 19920400, Weder; US-5111638, 19920500, Weder; US-5120382, 19920600, Weder; US-5152100, 19921000, Weder et al.; US-5181364, 19930100, Weder; US-D335105, 19930400, Ottenwalder et al.; US-5199242, 19930400, Weder et al.; US-5205108, 19930400, Weder et al.; US-5228234, 19930700, de Klerk et al.; US-5235782, 19930800, Landau; US-5239775, 19930800, Landau; US-5241783, 19930900, Krueger; US-5249407, 19931000, Stuck; US-5259106, 19931100, Weder et al.; US-5307606, 19940500, Weder; US-5315785, 19940500, Avot et al.; US-5350240, 19940900, Billman et al.; US-5353575, 19941000, Stepanek; US-5361482, 19941100, Weder et al.; US-5388695, 19950200, Gilbert; US-5428939, 19950700, Weder et al.; US-5443670, 19950800, L