1 Integrity  Service  Excellence Aerospace Vehicles Division 14 April 2015 Jon Tinapple Aerospace Vehicles Division Aerospace Systems Directorate Air.

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1 Integrity  Service  Excellence Aerospace Vehicles Division 14 April 2015 Jon Tinapple Aerospace Vehicles Division Aerospace Systems Directorate Air Force Research Laboratory Presented to the AFRL/NASA SBLI Technical Interchange Meeting, Tech Edge, Dayton Program status and future plans for Supersonic Propulsion integration research

2 Briefing Content Motivation Technologies needed for Future Air Dominance (FAD) Current road map Details of in-house efforts

3 Motivation Regain 4 th gen. inlet aerodynamic performance while moving beyond 5 th gen. survivability

4 Technologies Addressed by In-House research In-House Technology Development: Bleed-less or low bleed shock wave boundary layer interaction flow control Fore body boundary layer thinning/diversion tech beyond F-35 bump Advanced compression systems to reduce cowl drag and achieve high pressure recovery Subsonic diffuser flow control for aggressive diffusers downstream of normal shock

TRL 6 Need Date ASPIR II Inlet 4 Supersonic Propulsion Integration Research for Inlet Technologies (SPIRIT) In- House/Cooperative Testing Yearly Total Road Map Total Intermediate Scale Full Flight Envelop with Rep Fore Body Concept Development and small scale test with rep. fore body, Large Scale validation with Rep Fore Body, Active Controls/Geometry Assumes availability of 16S FAD Propulsion Integration Inlet Systems

6 Range of Experiments for Inlet Flow Control and Analysis Correct flow throat to engine face, flight Re Single shock interaction Single shock with diffusion Multiple shock system with diffusion (Generic inlet system) low Re SOA inlet system Previous Research Plan

7 In-House Effort to Support FAD Supersonic tunnel is down for repairs. Next SWBLI model entry summer 2016 Developing in-house CFD capability to analysis flow fields and define effective flow control configurations. Design, fabricate and bench test Plasma flow control hardware using SBIR II. Miniature scanning LDV probe system still under development at University of Alabama Use MAIBL hardware to develop external compression test fixture Unprecedented model complexity for TGF Near term (FY15-16), working cooperatively with airframers to perform screening test of advanced compression systems, boundary layer diversion techniques and shock wave boundary layer interaction flow control.

8 Mid term (FY17-19), working cooperatively with airframers on subsonic diffuser flow control for aggressive offset diffusers. Exhaust hardware being fabricated for facility. Primary facility flow plug being designed. Working on design of a new flow path that is More relevant to external compression inlets. Using NASA SUPIN code to develop initial Flow path Add cowl spillage to direct connect rig to simulate external compression flow field. Construct aggressive offset diffusers In-House Effort to Support FAD cont.

9 Improved understanding of corner flows in shock boundary layer interactions. Current problems with SWBLI model related to inadequately controlled corner flows. Largest variation between modeling techniques show up as vastly different corner flows. Expecting undesirables interactions between normal shock flow control and flow control for aggressive diffusion/curvature/shape change. Basic Research Needed