The dual impeller crossflow fan is a new type of fan equipment with the advantages of reduced drag and increased lift coefficient, which is mainly applied to all kinds of aerospace propulsion systems to improve the flight performance of aircraft. The design concept of the dual-wheel cross-flow fan is based on two relatively long impellers, which are dynamically balanced on both sides to meet the balancing standard and leave 60% space to cope with different environments and air duct designs.

The principle of operation of the twin-impeller cross-flow fan is that air is drawn in from the inside of the wing or at the leading edge position by means of an electric drive, and then through the rotation of the two impellers, the air is discharged from both sides of the wing, thus generating lift. This design effectively reduces the drag of the aircraft and increases the lift coefficient, thereby increasing the speed and range of the aircraft.

Although the dual-impeller cross-flow fan has been widely used in aviation propulsion systems, there are still some technical difficulties to be overcome in practical applications. For example, how to ensure the consistency of the rotational speed and direction of the two impellers to ensure the efficiency and stability of the fan; how to design and manufacture a dual-airwheel cross-flow fan with sufficient strength and durability to adapt to the use of aircraft at high speeds and in harsh environments.

Nevertheless, as a new type of aerospace propulsion system, the dual-airwheel crossflow fan has a broad application prospect. With the continuous development and improvement of the technology, the dual turbine crossflow fan is expected to be more widely used in the future aircraft design and manufacturing, thus improving the flight performance and safety of the aircraft.