Within the European funded research project JTI – SFWA (Joint Technology Initiative – Smart Fixed Wing Aircraft), system technologies and system architectures for the realization of Active Flow Control (AFC) for high lift systems shall be developed and assessed.
Objective of the integration of active flow control technologies is the increase of the efficiency of modern high lift systems for commercial aircraft. One major issue to be investigated is the realization of suitable system concepts to fulfill functional requirements with minimum impact on weight and power consumption. In this work, assessment tools, methods and concepts for systems performing the active flow control are developed and evaluated.
In a first step, a multidisciplinary process and suitable tools for the system design are implemented to achieve the involvement of various disciplines in an optimized workflow. With regard to the assessment objectives appropriate evaluation methods and tools are defined and implemented. Appropriate components are defined for the system design and suitable system architectures for active flow control are developed and evaluated. The assessment criteria include the necessary degree of redundancy to fulfill the safety and reliability requirements, system behavior with consideration of failure cases, system weight and energy consumption. Main contents of this study are:
Selecting the most suitable system architecture is one of the challenges for the AFC system. The selection should be based on costs, optimal usage of energy and space, less weight and more importantly safety.
The fluidic actuator is an important component in the AFC system. Various kinds of actuators are available. Each kind of jet actuator has its associated pros and cons. They can be divided briefly into two types: Mass Flow (MF) type (see figure above) and Zero Net Mass Flow (ZNMF) type.
The power that needs to be supplied to the actuation system has to be derived optimally from various kinds of energy sources – jet engines, batteries, electrical generators etc.