A gas turbine engine, comprising: a compressor section comprising a compressor configured to compress an air flow and a deswirl assembly configured to receive the air flow from the compressor; and a combustion section comprising a fuel injector assembly with a stem defining a fuel path for fuel, a flow guide coupled to and extending along the stem, the flow guide receiving at least a portion of the air flow from the deswirl assembly, wherein the flow guide is defined by a wall with edges attached to stem to form an air flow baffle between the wall and the outer surface of the stem, and a swirler apparatus coupled to the stem and configured to receive the fuel from the fuel path and the portion of the air flow from the flow guide, the swirler apparatus further configured to mix the fuel and the portion of the air flow to result in a fuel-air mixture, wherein the swirler apparatus includes a manifold defining a flow path to receive the air flow from the flow guide, the swirler apparatus further including an inner swirler within the flow path of the manifold to receive the air flow directed from the flow guide and an outer swirler downstream of the inner swirler to introduce additional air flow from a plenum into the flow path, and a combustor configured to receive the fuel-air mixture from the swirler apparatus and to ignite the fuel-air mixture to generate combustion gases. a compressor section comprising a compressor configured to compress an air flow and a deswirl assembly configured to receive the air flow from the compressor; and a combustion section comprising a fuel injector assembly with a stem defining a fuel path for fuel, a flow guide coupled to and extending along the stem, the flow guide receiving at least a portion of the air flow from the deswirl assembly, wherein the flow guide is defined by a wall with edges attached to stem to form an air flow baffle between the wall and the outer surface of the stem, and a swirler apparatus coupled to the stem and configured to receive the fuel from the fuel path and the portion of the air flow from the flow guide, the swirler apparatus further configured to mix the fuel and the portion of the air flow to result a fuel injector assembly with a stem defining a fuel path for fuel, a flow guide coupled to and extending along the stem, the flow guide receiving at least a portion of the air flow from the deswirl assembly, wherein the flow guide is defined by a wall with edges attached to stem to form an air flow baffle between the wall and the outer surface of the stem, and a swirler apparatus coupled to the stem and configured to receive the fuel from the fuel path and the portion of the air flow from the flow guide, the swirler apparatus further configured to mix the fuel and the portion of the air flow to result in a fuel-air mixture, wherein the swirler apparatus includes a manifold defining a flow path to receive the air flow from the flow guide, the swirler apparatus further including an inner swirler within the flow path of the manifold to receive the air flow directed from the flow guide and an outer swirler downstream of the inner swirler to introduce additional air flow from a plenum into the flow path, and a combustor configured to receive the fuel-air mixture from the swirler apparatus and to ignite the fuel-air mixture to generate combustion gases. a combustor configured to receive the fuel-air mixture from the swirler apparatus and to ignite the fuel-air mixture to generate combustion gases.