Abstract: A method is disclosed for evaluating inerting concentration of a fire suppression agent. The method includes flowing air upward into a chimney tube and flowing fuel into the flowing air in the chimney tube. A targeted concentration of the fire suppression agent is introduced into the flowing air and into the flowing fuel in the chimney tube. An ignitor is ignited to provide ignition energy to the flowing air and the flowing fuel, and the ignitor is deactivated. The targeted concentration of the fire suppression agent is at or above the inerting concentration of the fire suppression agent if combustion of the flowing fuel does not persist beyond three seconds after the ignitor is deactivated.

Abstract: An aerosol concentration sensor calibration device includes a mixing column, a sensor, and a collection vessel. The mixing column extends in a vertical orientation between an inlet at a bottom of the mixing column and an outlet at a top of the mixing column, the mixing column configured to receive a mixture of a powder and a compressed gas at the inlet. The sensor is disposed in the mixing column and configured to measure the concentration of the powder in the mixing column. The collection vessel has an inlet fluidly coupled to the outlet of the mixing column. The collection vessel is configured to collect the powder received from the mixing column.

Abstract: A fire suppressant blend comprises CF3I; at least one hydrofluoro-olefin (HFO) or hydrochlorofluoro-olefin (HCFO), or both; and carbon dioxide.

Abstract: An assembly for detecting agglomeration of a powder for a fire suppression system includes a vessel configured to contain a powder and a compressed gas and a plurality of piezoelectric sensors disposed in the vessel. At least one sensor of the plurality of sensors is disposed at an interface of the powder and the compressed gas when the vessel is in a filled state.

Abstract: According to an aspect of the present disclosure, an aerosol concentration sensor calibration device includes a mixing column, a sensor, and a collection vessel. The mixing column extends in a vertical orientation between an inlet at a bottom of the mixing column and an outlet at a top of the mixing column, the mixing column configured to receive a mixture of a powder and a compressed gas at the inlet. The sensor is disposed in the mixing column and configured to measure the concentration of the powder in the mixing column. The collection vessel has an inlet fluidly coupled to the outlet of the mixing column. The collection vessel is configured to collect the powder received from the mixing column.

Abstract: A nozzle of a fire suppression system includes a housing. Two or more orifices in the housing emit a fire suppression agent. Each of the two or more orifices emits the fire suppression agent in a rotational vortex.

Abstract: A method is disclosed for evaluating inerting concentration of a fire suppression agent. The method includes flowing air upward into a chimney tube and flowing fuel into the flowing air in the chimney tube. A targeted concentration of the fire suppression agent is introduced into the flowing air and into the flowing fuel in the chimney tube. An ignitor is ignited to provide ignition energy to the flowing air and the flowing fuel, and the ignitor is deactivated. The targeted concentration of the fire suppression agent is at or above the inerting concentration of the fire suppression agent if combustion of the flowing fuel does not persist beyond three seconds after the ignitor is deactivated.

Abstract: A flow control device is including a tubular body including a tubular wall with an inner surface, an outer surface, and one or more openings extending from the outer surface to the inner surface through the tubular wall; a faired body encircling the tubular body, the faired body including a radially inner surface and a radially outer surface; and a flow shield encircling the faired body, the flow shield including a radially inward surface and a radially outward surface, the radially inward surface being in a facing spaced relationship with the radially outer surface of the faired body defining a passageway therebetween, wherein the passageway is fluidly connected to the one or more openings.

Abstract: A system includes a pressure vessel defining an interior space with a discharge outlet. A valve or burst disc is connected in fluid communication with the discharge outlet. Discharge piping is included in fluid communication with the valve or burst disc to receive discharge from the interior space. One or more discharge nozzles are in fluid commination with discharge piping for issuing a spray from the discharge piping into the environment external of the pressure vessel. A mixture of liquid Carbon Dioxide (CO2) and a dry chemical fire extinguishing agent is housed under pressure within the interior space.

Abstract: A nozzle of a fire suppression system includes a housing. Two or more orifices in the housing emit a fire suppression agent. Each of the two or more orifices emits the fire suppression agent in a rotational vortex.

Abstract: A particle concentration measurement system includes a first window and a second window separated by a sensing volume. The system also includes one or more supports to provide structural support for the first window at a first end and for the second window at a second end, opposite the first end, of each of the one or more supports. The sensing volume is defined by the one or more supports and the first window and the second window is open to an environment of the particle concentration measurement system adjacent to the one or more supports such that particle-laden gas from the environment that includes particles mixed with other materials enters the sensing volume. A first compressed gas orifice directs compressed gas onto the first window to clean the first window and a second compressed gas orifice directs the compressed gas onto the second window to clean the second window.

Abstract: A fire suppressant system, including: a nozzle having a passage wall that defines a converging-diverging passage, having: an inlet, an outlet downstream of the inlet, and a throat region that includes a converging portion and a diverging portion; a cone within the passage, having an upstream apex located within the diverging portion and a downstream end located within the passage and adjacent to the outlet, the cone has a radial outer wall that defines an exhaust passage with the passage wall, and the cone has a plurality of axial segments with differing segment cone angles, including: a first segment at the upstream apex of the cone that has a first cone angle such that the exhaust passage narrows along the first segment; and a second segment that is adjacent to the first segment and that has a second cone angle such that the exhaust passage expands along the second segment.

Abstract: A system for testing a fire suppression agent comprises an enclosed volume configured to receive an amount of the fire suppression agent therein, and at least one burner assembly positioned within the enclosed volume. The at least one burner assembly comprises a burner configured to produce a flame, the burner comprising a premixing section, a fuel source in communication with the burner, an ignition source, and a first sensor for measuring a first flame characteristic.

Abstract: A fire suppression blends of CF3I and 2-BTP with mol ratios from 1:5 and 5:1 are capable of passing peak inerting and sub-inerting tests. The CF3I:2-BTP fire suppression blends can also include carbon dioxide of up to 80% of the fire suppression blend to provide additional cooling.

Abstract: A flow control device includes a flow shield defining a volume and a plurality of shield openings of the flow shield arranged such that gas entering the volume must pass through at least one of the plurality of shield openings. The flow control device also includes a flow restrictor to define an opening for the gas exiting the volume.

Abstract: Exemplary embodiments pertain to the art of first suppressants and, in particular, to maintaining a desired and constant blend of multiple fire suppressants during discharge. The present disclosure provides fire extinguisher assemblies utilizing a constant blend ratio of fire suppressant agents during discharge. More particularly, the present disclosure provides fire extinguisher assemblies utilizing a constant blend ratio of a first fire suppressant agent (e.g., a low-boiling, high-volatility agent) and a second fire suppressant agent (e.g., a higher-boiling, lower-volatility agent) during discharge. The embodiments and fire extinguisher assemblies described herein can help keep the pressure constant during discharge of the fire extinguisher assemblies.

Abstract: A fire suppression composition comprises CF3I and CO2, wherein said CF3I is present in an amount of from 23 mol. % to 39 mol. %, based on the total moles of CF3I and CO2 present in the fire suppression composition. Alternatively, the fire suppression composition comprises CF3I and CO2, wherein said CF3I is present in an amount of from 53 mol. % to 85 mol. %, based on the total moles of CF3I and CO2 present in the fire suppression composition.

Abstract: A particle concentration measurement system includes a first window and a second window in a housing. The first window and the second window respectively define a first end and a second end of an interaction region between the first window and the second window. The system also includes a particle-laden gas inlet through a wall of the housing between the first window and the second window. The particle-laden gas inlet introduces particle-laden gas from an environment that includes particles mixed with other materials into the interaction region. A first set of clean gas inlets through the wall of the housing are at different radial positions of the housing and at a first axial location of the housing, and a second set of clean gas inlets through the wall of the housing are at different radial positions of the housing and at a second axial location of the housing.

Abstract: A fire suppression system in an aircraft includes a first nozzle within a region to perform discharge of a fire suppression agent in a first direction within a region. The systems also includes a second nozzle within the region to perform discharge of the fire suppression agent in a second direction within the region. The discharge in the first direction by the first nozzle and the discharge in the second direction by the second nozzle generate and maintain a vortex of the fire suppression agent that occupies the region with rotational flow.

Abstract: A flow control insert includes a main body that is shaped as a cylinder, is hollow, and includes an opening at a first end and at a second end, opposite the first end, along an axial length of the cylinder. An outer surface of the main body includes threading to screw into complementary threading on an inner surface of a pipe configured to flow an agent. The flow control insert also includes a diverter within the main body or extending from the first end of the main body. The diverter controls a mass split of the agent or flow energy of the agent flowing in the pipe.