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A combustor apparatus is provided, comprising a mixing arrangement for mixing a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture. A combustion chamber is at least partially defined by a porous perimetric transpiration member, at least partially surrounded by a pressu

A combustor apparatus is provided, comprising a mixing arrangement for mixing a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture. A combustion chamber is at least partially defined by a porous perimetric transpiration member, at least partially surrounded by a pressure containment member. The combustion chamber has longitudinally spaced apart inlet and outlet portions. The fuel mixture is received by the inlet portion for combustion within the combustion chamber at a combustion temperature to form a combustion product. The combustion chamber directs the combustion product longitudinally toward the outlet portion. The transpiration member is configured to substantially uniformly direct a transpiration substance therethrough toward the combustion chamber, such that the transpiration substance is directed to flow helically about the perimeter and longitudinally between the inlet and outlet portions, for buffering interaction between the combustion product and the transpiration member. Associated systems are also provided.

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1. An apparatus, comprising: a mixing arrangement configured to mix a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture; anda combustor arrangement defining a combustion chamber having an inlet portion longitudinally spaced apart from an opposing outlet portion, the i

1. An apparatus, comprising: a mixing arrangement configured to mix a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture; anda combustor arrangement defining a combustion chamber having an inlet portion longitudinally spaced apart from an opposing outlet portion, the inlet portion being configured to receive the fuel mixture for combustion within the combustion chamber at a combustion temperature to form a combustion product, the combustion chamber being further configured to direct the combustion product longitudinally toward the outlet portion, the combustor arrangement comprising: a pressure containment member;a porous perimetric transpiration member at least partially defining the combustion chamber, and being at least partially surrounded by the pressure containment member, the porous transpiration member being configured to direct a transpiration substance therethrough toward and into the combustion chamber, substantially uniformly about the perimeter thereof, such that the transpiration substance is directed substantially tangential to the perimeter of the porous transpiration member, and to flow helically about the perimeter thereof and longitudinally between the inlet portion and the outlet portion, to buffer interaction between the combustion product and the porous transpiration member; anda burner device configured to receive the fuel mixture from the mixing arrangement and to direct the fuel mixture into the inlet portion of the combustion chamber in a direction opposite to the helical flow of the transpiration substance,wherein the working fluid and the transpiration substance comprise supercritical carbon dioxide. 2. An apparatus according to claim 1, wherein the mixing arrangement is further configured to mix one of a solid carbonaceous fuel, a liquid carbonaceous fuel, and a gaseous carbonaceous fuel with the enriched oxygen, comprising oxygen having a molar purity of greater than about 85%, and the working fluid. 3. An apparatus according to claim 1, wherein the carbonaceous fuel is a particulate solid having an average particle size of between about 50 microns and about 200 microns, and the mixing arrangement is further configured to mix the particulate solid carbonaceous fuel with a fluidizing substance, the fluidizing substance comprising one of water and liquid CO2 having a density of between about 450 kg/m3 and about 1100 kg/m3, the fluidizing substance cooperating with the particulate solid carbonaceous fuel to form a slurry having between about 25 weight % and about 95 weight % of the particulate solid carbonaceous fuel. 4. An apparatus according to claim 1, wherein the combustion chamber is further configured to receive the fuel mixture in the inlet portion thereof at a pressure of between about 40 bar and about 500 bar. 5. An apparatus according to claim 1, wherein the combustion temperature is between about 1300° C. and about 5000° C., and is configured such that incombustible contaminants in the carbonaceous fuel are liquefied within the combustion product. 6. An apparatus according to claim 1, wherein the transpiration substance is configured to be introduced into the combustion chamber via the porous transpiration member so as to regulate an exit mixture of the transpiration substance and the combustion product about the outlet portion of the combustion chamber at a temperature of between about 400° C. and about 3500° C. 7. An apparatus according to claim 6, wherein the transpiration substance is directed through the porous transpiration member such that the transpiration substance forms a buffer layer immediately adjacent to the porous transpiration member within the combustion chamber, the buffer layer being configured to buffer interaction between the porous transpiration member and liquefied incombustible contaminants and heat associated with the combustion product. 8. An apparatus according to claim 1, wherein the porous transpiration member is configured to impart a Coanda effect on the transpiration substance directed therethrough and into the combustion chamber, so as to direct the transpiration substance to flow substantially tangential to the perimeter of the porous transpiration member. 9. An apparatus according to claim 1, wherein the porous transpiration member further includes at least one transpiration port extending therethrough, the at least one transpiration port being configured to direct a supplemental linear flow of the transpiration substance into one of the fuel mixture and the combustion product so as to affect flow characteristics thereof. 10. An apparatus according to claim 1, further comprising a heat removal device associated with the pressure containment member and configured to control a temperature thereof, the heat removal device comprising a heat transfer jacket having a liquid circulated therein. 11. An apparatus according to claim 1, wherein the porous transpiration member is further configured to define pores, the porous transpiration member further having a cumulative pore area substantially equal to a surface area of the porous transpiration member defining the pores. 12. An apparatus according to claim 11, wherein the pores are spaced apart and substantially uniformly distributed about the porous transpiration member and between the inlet and outlet portions thereof. 13. An apparatus according to claim 1, further comprising a transformation apparatus configured to receive the combustion product from the outlet portion of the combustion chamber, the transformation apparatus being responsive to the combustion product to transform energy associated therewith into kinetic energy. 14. An apparatus according to claim 13, wherein the carbonaceous fuel is a solid, and the apparatus further comprises a separator apparatus disposed between the combustor arrangement and the transformation apparatus, the separator apparatus being configured to substantially remove liquefied incombustible contaminants from the combustion product received thereby prior to the combustion product being directed to the transformation apparatus. 15. An apparatus according to claim 14, wherein the transpiration substance is configured to be introduced into the combustion chamber via the porous transpiration member so as to regulate a mixture of the transpiration substance and the combustion product entering the separator apparatus above a liquification temperature of the incombustible contaminants. 16. An apparatus according to claim 15, further comprising a transpiration substance delivery device disposed subsequently to the separator apparatus and configured to deliver the transpiration substance to the combustion product having the liquefied incombustible contaminants substantially removed therefrom so as to regulate a mixture of the transpiration substance and the combustion product entering the transformation apparatus at a temperature of between about 400° C. and about 3500° C. 17. An apparatus according to claim 14, wherein the separator apparatus further comprises a plurality of serially arranged centrifugal separator devices, each centrifugal separator device having a plurality of centrifugal separator elements operably arranged in parallel, and wherein the liquefied incombustible contaminants removed from the combustion product by the separator apparatus are removably collected in a sump associated with the separator apparatus. 18. An apparatus according to claim 13, wherein the transformation apparatus comprises one of a turbine device configured to be responsive to the combustion product so as to transform the energy associated therewith into kinetic energy, and a generator device configured to transform the kinetic energy into electricity. 19. An apparatus according to claim 1, wherein the transpiration substance is also supplied to the mixing arrangement as the working fluid. 20. An apparatus according to claim 1, further comprising at least one transpiration substance source configured to supply the transpiration substance to at least one of the mixing arrangement as the working fluid and the transpiration member as the transpiration substance. 21. An apparatus, comprising: a mixing arrangement configured to mix a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture; anda combustor arrangement defining a combustion chamber having an inlet portion longitudinally spaced apart from an opposing outlet portion, the inlet portion being configured to receive the fuel mixture for combustion within the combustion chamber at a combustion temperature to form a combustion product, the combustion chamber being further configured to direct the combustion product longitudinally toward the outlet portion, the combustor arrangement comprising: a pressure containment member;a porous perimetric transpiration member at least partially defining the combustion chamber, and being at least partially surrounded by the pressure containment member, the porous transpiration member being configured to direct a transpiration substance therethrough toward and into the combustion chamber, substantially uniformly about the perimeter thereof, such that the transpiration substance is directed substantially tangential to the perimeter of the porous transpiration member, and to flow helically about the perimeter thereof and longitudinally between the inlet portion and the outlet portion, to buffer interaction between the combustion product and the porous transpiration member; anda burner device configured to receive the fuel mixture from the mixing arrangement and to direct a substantially uniform linear flow of the fuel mixture into the inlet portion of the combustion chamber, wherein the helical flow of the transpiration substance is configured to induce swirl of the fuel mixture within the combustion chamber. 22. An apparatus according to claim 21, wherein the combustion chamber includes a combustion section disposed toward the inlet portion and a post-combustion section disposed toward the outlet portion, and wherein the porous transpiration member is configured such that the helical flow of the transpiration substance over the post-combustion section is opposite to the helical flow of the transpiration substance over the combustion section so as to reverse the induced swirl of the combustion product in the post-combustion section with respect to the induced swirl of the fuel mixture in the combustion section. 23. An apparatus according to claim 21, wherein the porous transpiration member is configured such that the helical flow of the transpiration substance is alternatingly reversed along at least a section thereof so as to alternatingly reverse the induced swirl of one of the fuel mixture and the combustion product between the inlet portion and the outlet portion.