Abstract: A gas turbine engine including: a fan assembly comprising a fan; and a turbomachine drivingly coupled to the fan and including a compressor section, a combustion section, and a turbine section arranged in serial flow order and defining in part a working gas flowpath, the gas turbine engine defining a bypass passage over the turbomachine; the turbomachine further including a heat exchanger and defining an annular cooling passage extending between an inlet and an outlet, the inlet in airflow communication with the working gas flowpath at a location upstream of the compressor section and the outlet in airflow communication with the bypass passage, the heat exchanger in thermal communication with an airflow through the cooling passage.

Abstract: Adapters and methods related to aeration applications. An adapter for use in water treatment applications. The adapter includes a generally circular member for conversion of an aeration diffuser holder from a membrane diffuser element holder to a ceramic diffuser element holder. The generally circular member includes a top adapted to receive a retaining ring, a bottom adapted to receive an aeration diffuser holder, a diameter adapted to receive a ceramic diffuser element, and a height adapted to receive a ceramic diffuser element.

Abstract: Adapters and methods related to aeration applications. An adapter for use in water treatment applications. The adapter includes a generally circular member for conversion of an aeration diffuser holder from a membrane diffuser element holder to a ceramic diffuser element holder. The generally circular member includes a top adapted to receive a retaining ring, a bottom adapted to receive an aeration diffuser holder, a diameter adapted to receive a ceramic diffuser element, and a height adapted to receive a ceramic diffuser element.