A gas turbine engine component assembly, comprising: a first component having a first surface and a second surface opposite the first surface, wherein the first component includes a cooling hole extending from the second surface to the first surface through the first component; a second component having a first surface and a second surface, the first surface of the first component and the second surface of the second component defining a cooling channel therebetween in fluid communication with the cooling hole for cooling the second surface of the second component; and a lateral flow injection feature (500 b,d) integrally formed in the first component, the lateral flow injection feature fluidly connecting an airflow path located proximate to the second surface of the first component to the cooling channel, the lateral flow injection feature being configured to direct airflow from the airflow path through a passageway (506 b,d) and into the cooling channel at least partially in a lateral direction parallel to the second surface of the second component such that a cross flow is generated in the cooling channel, wherein the lateral flow injection feature (500b,d) is fluidly connected to the airflow path through an inlet (502 b,d) oriented perpendicular to the second surface of the first component or oriented parallel to the airflow path, and characterized in that the lateral flow injection feature (500b; 500d) further comprises: a particulate collection location (530b; 530d) located opposite the inlet (502b; 502d) and proximate a particulate separation turn (550b; 550d) configured to turn the airflow such that a particulate separates from the airflow and is directed into the particulate collection location, wherein the particulate collection location (530b, 530d) is configured as a collection well. a first component having a first surface and a second surface opposite the first surface, wherein the first component includes a cooling hole extending from the second surface to the first surface through the first component; a second component having a first surface and a second surface, the first surface of the first component and the second surface of the second component defining a cooling channel therebetween in fluid communication with the cooling hole for cooling the second surface of the second component; and a lateral flow injection feature (500 b,d) integrally formed in the first component, the lateral flow injection feature fluidly connecting an airflow path located proximate to the second surface of the first component to the cooling channel, the lateral flow injection feature being configured to direct airflow from the airflow path through a passageway (506 b,d) and into the cooling channel at least partially in a lateral direction parallel to the second surface of the second component such that a cross flow is generated in the cooling channel, wherein the lateral flow injection feature (500b,d) is fluidly connected to the airflow path through an inlet (502 b,d) oriented perpendicular to the second surface of the first component or oriented parallel to the airflow path, and characterized in that the lateral flow injection feature (500b; 500d) further comprises: a particulate collection location (530b; 530d) located opposite the inlet (502b; 502d) and proximate a particulate separation turn (550b; 550d) configured to turn the airflow such that a particulate separates from the airflow and is directed into the particulate collection location, wherein the particulate collection location (530b, 530d) is configured as a collection well. a particulate collection location (530b; 530d) located opposite the inlet (502b; 502d) and proximate a particulate separation turn (550b; 550d) configured to turn the airflow such that a particulate separates from the airflow and is directed into the particulate collection location, wherein the particulate collection location (530b, 530d) is configured as a collection well.