Other functions - task order - statement of work (SOW) task title: AFC-enabled simplified high-lift system integration study 1.0 introduction/background: as part of the NASA fundamental aeronautics…

Other functions - task order - statement of work (SOW) task title: AFC-enabled simplified high-lift system integration study 1.0 introduction/background: as part of the NASA fundamental aeronautics program, fixed wing (FW) project, aerodynamic efficiency subproject, NASA is seeking to demonstrate the potential benefits of reducing complexities associated with a modern high-lift system without sacrificing aerodynamic or acoustic performance. One promising approach for a simplified high-lift system is to utilize active flow control (AFC) to provide required performance for low-speed flight conditions representative of takeoff and landing. NASA is seeking to evaluate the relative merits of selected AFC systems within the framework of the FW project goals regarding noise and fuel burn reductions of a modern civil transport aircraft. Modern high-lift systems are designed to allow a transport aircraft with typical transonic cruise speeds to safely operate at slow speeds for landing and takeoff operations. The high-lift system is usually slotted both on the leading edge and the trailing edge of the wing to take advantage of the aerodynamic properties of slotted flows and achieve the necessary high lift performance. The slotted leading and trailing edge devices, and the associated sub-systems necessary to change the wing configuration from cruise to low-speed, are complex and employ a significant number of parts to enable safe operation. In a prior NASA-funded study (mclean ET AL.: NASA/CR-1999-209338), a systems benefit study was performed for the application of flow control on civil transports. One key recommendation from that study was to apply AFC to the high-lift system, citing significant potential for positive impact in terms of aerodynamic benefit, reduced fuel burn and reduced maintenance. The assumed AFC technology, however, was not quite mature for high-lift applications at the time. Recently, advancements in the sweeping jet AFC technology produced promising results (seele ET AL.: aiaa-2012-3244 and aiaa-2013-0411) justify a new examination and an update to the AFC-enabled high-lift system study. This new task order is required to further examine and address the aerodynamic performance, structural integration, weight, complexity, energy requirements, cost, noise, and operational concerns of the AFC-enabled high-lift system previously studied under NASA/CR-1999-209338. The new study will account for the recent advancements in AFC and high-lift technologies. For this new task order, a generic wing configuration (i.e., nasas common research model (CRM) geometry, which is an open geometry representative of modern in-service commercial transport aircraft), shall be used to establish a baseline conventional high lift and AFC-enabled simplified high-lift systems representative of a modern civil transport. The CRM geometry (iges or FEM) files can be downloaded at http://commonresearchmodel.larc.NASA.GOV/. 2.0 scope & objective(s): the scope of this task order is to assess the integration requirements and estimate the potential system-level benefits of AFC systems (e.g., zero-net and positive-net mass flux) applied to a simplified high-lift system for the purpose of recovering the expected loss or degradation of the aerodynamic performance due to its simplification (i.e., reduced high-lift wing area). The objectives of this task order are: establish performance metrics for assessing the effectiveness of AFC on a generic transport wing relative to a baseline conventional high-lift design and its performance requirements. Establish a net present value (NPV) for AFC-enabled simplified high-lift system(s) applied to the generic transport wing in order to assess the relative benefit of the AFC systems at the airplane level (e.g., in terms of weight, cost, and fuel savings). Investigate and perform trade study on how AFC-enabled simplified high-lift system