A method of fire suppression may include injecting a reactive agent into a reaction zone to produce a catalytically active species for fire suppression and conveying the catalytically active species to a fire to catalytically interfere with flame chemistry of the fire. Fire in a fuel tank may be sup
A method of fire suppression may include injecting a reactive agent into a reaction zone to produce a catalytically active species for fire suppression and conveying the catalytically active species to a fire to catalytically interfere with flame chemistry of the fire. Fire in a fuel tank may be suppressed by injecting the reactive agent into a convective flow of a mixture of fuel and oxidizer in a fuel tank, the reactive agent reacting in the fuel tank to release a species which catalytically interferes with flame chemistry to suppress fire in the fuel tank. Fire at an airplane crash may be suppressed by releasing the reactive agent from the container at the crash site to produce an active species to catalytically interfere with a fire at the crash site.
대표청구항▼
1. A fire suppression system, comprising: a structure having a source of fuel, an air intake and an outlet so that air flows in an air flow path through the structure between the air intake and the outlet, and wherein the structure defines a volume and one or more flame holding regions capable of su
1. A fire suppression system, comprising: a structure having a source of fuel, an air intake and an outlet so that air flows in an air flow path through the structure between the air intake and the outlet, and wherein the structure defines a volume and one or more flame holding regions capable of sustaining a spatially stable flame in the presence of an oxidizer and fuel;a reactive agent; andan injection point disposed at the structure with respect to one or more predetermined natural flows of at least one of an oxidizer and a fuel within the volume that respectively pass through one or more predetermined said flame holding regions, wherein one or more respective reaction zones occur within the one or more predetermined natural flows, so that releasing the reactive agent at the injection point into at least one of the one or more predetermined natural flows causes at least one of the one or more predetermined natural flows to transport the reactive agent to at least one of the one or more reaction zones, in which the reactive agent reacts to produce a catalytic fire suppressing agent, and so that the at least one of the one or more natural flows transports the catalytic fire suppressing agent to at least one of the one or more predetermined flame holding regions. 2. The system of claim 1, wherein the fire suppressing agent is transportable by the air flow path to at least one area of recirculation in the structure. 3. The system of claim 1, wherein the at least one of the one or more predetermined natural flows passes through two said predetermined flame hold regions. 4. The system of claim 1, wherein the structure defines multiple said predetermined flame holding regions and at least one respective said predetermined natural flow for each said predetermined flame holding region of the multiple said predetermined flame holding regions, and further comprising a respective said injection point for each at least one respective said predetermined natural flow. 5. The system of claim 1, further comprising at least one fire detector positioned in an area that includes a said predetermined flame holding region along a respective said one or more predetermined natural flow. 6. The system of claim 1, further comprising: a fire detector in an area that includes a said predetermined flame holding region; anda control system for automatically injecting the reactive agent at the injection point in response to actuation of the fire detector. 7. The system of claim 1, wherein the structure comprises an internal combustion engine that defines the volume. 8. The system of claim 1, wherein the at least one of the one or more reaction zone is upstream, with respect to the at least one of the one or more predetermined natural flows, from the at least one of the one or more predetermined flame holding regions so that the reactive agent reacts to form the catalytic fire suppressing agent before reaching the at least one of the one or more predetermined flame holding regions. 9. The system of claim 1, wherein the reactive agent reacts with water vapor upstream of the at least one of the one or more predetermined flame holding regions to form the catalytic fire suppressing agent. 10. A method of suppressing fire comprising: providing a structure having a volume and having a source of fuel, an air intake and an outlet so that air flows in an air flow path through the structure between the air intake and the outlet, whereinthe structure defines one or more flame holding regions within the volume capable of sustaining a spatially stable flame in the presence of an oxidizer and fuel, andthe structure defines one or more predetermined natural flows within the volume of at least one of an oxidizer and a fuel that respectively pass through one or more predetermined said flame holding regions; andinjecting a fire suppressing agent into the one or more predetermined natural flows so that the fire suppressing agent is transported thereby to the one or more predetermined flame holding regions and so that a minimum amount of the fire suppressing agent sufficient to suppress a fire at the one or more predetermined flame holding regions when injected into the one or more predetermined natural flows is less than a minimum amount of the fire suppressing agent sufficient to suppress the fire by flooding the volume. 11. The method of claim 10, further comprising selectively releasing the fire suppressing agent from a tank under pressure. 12. The method of claim 10, wherein the structure defines multiple said predetermined flame holding regions and at least one said predetermined natural flow for each said predetermined flame holding region. 13. The method of claim 10, wherein the freezing point of the fire suppressing agent is lowered by storage in a tank with pressurized nitrogen before the fire suppressing agent is injected at the injecting step. 14. A fire suppression system, comprising: a structure having a source of fuel, an air intake and an outlet so that air flows in an air flow path through the structure between the air intake and the outlet, and wherein the structure defines a volume and one or more flame holding regions within the volume capable of sustaining a spatially stable flame in the presence of an oxidizer and fuel;a fire suppressing agent; andan injection point disposed at the structure with respect to one or more predetermined natural flows of at least one of an oxidizer and a fuel within the volume that respectively pass through one or more predetermined said flame holding regions so that releasing the fire suppressing agent at the injection point into at least one of the one or more predetermined said natural flows transports the fire suppressing agent to at least one of the one or more predetermined flame holding regions through which the at least one of the one or more predetermined natural flows pass and so that a minimum amount of the fire suppressing agent sufficient to suppress a fire at the at least one of the one or more predetermined flame holding regions when released at the injection point is less than a minimum amount of the fire suppressing agent sufficient to suppress the fire by flooding the volume. 15. The fire suppression system as in claim 14, wherein the fire suppressing agent is a reactive agent. 16. The fire suppression system as in claim 15, comprising a reaction zone in each said one or more predetermined natural flow so that reactive agent injected into the one or more predetermined natural flows at a said injection point reacts to form a catalytic fire suppressing agent before reaching the one or more predetermined flame holding regions through which the one or more predetermined natural flows pass. 17. The fire suppression system of claim 16, wherein the catalytic fire suppressing agent is transportable by the one or more predetermined natural flows to at least one area of recirculation in the structure. 18. The fire suppression system of claim 16, wherein the catalytic fire suppressing agent is transportable to two said one or more predetermined flame holding regions by the one or more predetermined natural flows. 19. The fire suppression system of claim 14, wherein the structure defines multiple said one or more predetermined flame holding regions and at least one said one or more predetermined natural flow for each one or more said predetermined flame holding region, and further comprising a respective said injection point for each said one or more predetermined natural flow. 20. The fire suppression system of claim 14, further comprising at least one fire detector positioned in an area that includes a said one or more predetermined flame holding region along a said one or more predetermined natural flow. 21. The fire suppression system of claim 14, further comprising: a fire detector in an area that includes a said one or more predetermined flame holding region; anda control system for automatically injecting the fire suppressing agent at the injection point in response to actuation of the fire detector. 22. The fire suppression system of claim 14, wherein the structure comprises an internal combustion engine that defines the volume. 23. A method of suppressing fire comprising: providing a structure defining a volume and having a source of fuel, an air intake and an outlet so that air flows in an air flow path through the structure between the air intake and the outlet, whereinthe structure defines one or more flame holding regions within the volume capable of sustaining a spatially stable flame in the presence of an oxidizer and fuel;identifying one or more natural flows within the volume of at least one of an oxidizer and a fuel that respectively pass through one or more predetermining said one or more flame holding regions; andinjecting a fire suppressing agent into a said identified natural flow, for a respective said one or more predetermined flame holding region through which the identified natural flow passes so that the fire suppressing agent is transported thereby to the respective one or more predetermined flame holding region, at an injection point disposed at the structure so that a minimum amount of the fire suppressing agent sufficient to suppress a fire at said respective one or more predetermined flame holding region when released at the injection point is less than a minimum amount of the fire suppressing agent sufficient to suppress the fire by flooding the volume. 24. The method of claim 23, further comprising selectively releasing the fire suppressing agent from a tank under pressure. 25. The method of claim 23, wherein the fire suppressing agent is a reactive agent that reacts to form a chemical species that catalytically interferes with flame chemistry. 26. The method of claim 23, wherein the structure defines multiple said one or more flame holding regions and at least one said identified natural flow for each said one or more predetermined flame holding region. 27. The method of claim 23, wherein the freezing point of the fire suppressing agent is lowered by storage in a tank with pressurized nitrogen before the fire suppressing agent is injected at the injecting step. 28. A fire suppression system, comprising: a structure having a source of fuel, an air intake and an outlet so that air flows in an air flow path through the structure between the air intake and the outlet, and wherein the structure defines a volume and one or more flame holding regions capable of sustaining a spatially stable flame in the presence of an oxidizer and fuel;a reactive agent;a reaction zone in which the reactive agent reacts to produce a catalytic fire suppressing agent, wherein the reactive agent encounters the reaction zone offset from the one or more flame holding regions; andan injection point disposed at the structure with respect to one or more predetermined natural flows of at least one of an oxidizer and a fuel within the structure that respectively pass through one or more predetermined said one or more flame holding regions and the reaction zone so that the catalytic fire suppressing agent is transported by the one or more predetermined natural flows to the one or more predetermined flame holding regions. 29. A fire suppression system as in claim 28, comprising a control system for injecting the reactive agent through the injection point to form a chemical species for transport by the one or more predetermined natural flow. 30. The system of claim 29, wherein the reaction zone is upstream, with respect to a said predetermined natural flow, from the one or more predetermined flame holding region so that the reactive agent reacts to form the catalytic fire suppressing agent before reaching the one or more predetermined flame holding region.
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