Particle separator assembly for a turbine engine

A turbine engine comprising:

• an engine core having a compressor section, combustion section, and a turbine section in an axial flow arrangement;
• a cooling air circuit in fluid communication with at least one of the compressor section, combustion section, or turbine section;
• a particle separator fluidly coupled to the cooling air circuit;
• the particle separator comprising:
• a housing defining an airflow passage comprising an inlet and an outlet, and through which passes a primary airflow from the cooling air circuit;
• a structural duct disposed within the airflow passage between the inlet and the outlet such that the primary airflow flows outside of the structural duct and a scavenge passage is formed within the structural duct;
• the structural duct further defining parallel facing, planar walls spaced from each other to form an elongated opening defining a particle drain defining a particle path from the airflow passage outside of the structural duct into the scavenge passage within the structural duct in a different direction from the primary airflow;
• and
• a heat exchanger having at least one fluid channel formed in a wall of the housing and fluidly separate from the airflow passage, the wall defining at least a portion of the airflow passage and the at least one fluid channel having an extent along the airflow passage between the inlet and the outlet that overlaps with an extent of the particle drain along the airflow passage between the inlet and the outlet.