Patent ID: 9027323
Filing Date: 2015-05-12
Classification: F02K,F05D

Abstract:
1. An adjustable bloom mixer for a turbofan engine for setting a mixing ratio between a cold airflow from a bypass duct and a hot airflow from a core flow duct to adjust a radial dimension of a bloom mixer, comprising: a bloom mixer having a rotationally symmetrical part and a thin-walled, corrugated part having an inner surface and an outer surface; an air-guiding element arranged upstream of the thin-walled, corrugated part for branching off at least one chosen from a group consisting of a cold partial airflow from a bypass duct and a hot airflow from a core flow duct of the engine; an air control device downstream of the air-guiding element for leading the at least one chosen from the branched-off cold partial airflow or hot airflow along at least one chosen from the inner surface and the outer surface of the bloom mixer to deflect the corrugated part radially inwards or outwards due to one chosen from thermal contraction and thermal expansion resulting from a temperature difference between the inner surface and the outer surface effected by the at least one chosen from the cold partial airflow and the hot airflow; a plurality of first cold air passage openings arranged at regular intervals on the air control device; a plurality of second cold air passage openings arranged at regular intervals on the air control device; a rotatable closure ring having a plurality of first closure flaps and a plurality of second closure flaps offset from one another; wherein the first and second cold air passage openings are also arranged offset to one another and are alternately closable by the first closure flaps and the second closure flaps, respectively, via rotation of the closure ring.