Active Fan Tip Treatment Using Rotating Drum Array

The patent employs actively controllable tip treatment elements (such as movable tips or adjustable geometry features) that can dynamically change their configuration in response to detected distortion conditions. This dynamic adaptation allows the fan to maintain optimal performance across varying operating conditions while actively mitigating distortion effects, thereby resolving the contradiction between compact integration and stall margin preservation.

The invention utilizes active control systems that detect distortion parameters (pressure gradients, swirl intensity) and adjust fan operating parameters (tip geometry, flow distribution, rotational speed) in real-time. By changing these parameters adaptively, the system maintains reliable operation in embedded applications despite the presence of high distortion, thus improving both adaptability and reliability simultaneously.

The patent divides the tip treatment function into multiple discrete, modular elements distributed around the fan periphery. Each segment can be independently controlled or activated based on local distortion conditions. This segmentation approach enables effective distortion mitigation through localized control while keeping individual element complexity low and allowing for phased implementation, thus reducing overall system complexity.

The invention incorporates self-regulating features where the distortion mitigation system automatically detects and responds to distortion conditions without requiring complex external control systems. The tip treatment elements possess inherent feedback mechanisms that enable them to self-adjust their configuration based on local flow conditions, thereby achieving reliable stall margin improvement while minimizing control system complexity.