Combustor and Material Integration for high speed aircraft in the European research Program ATLLAS2.

Abstract : The European effort ATLLAS was followed by an ATLLAS2 program, started in 2011. A particular Work Package is dealing with research and technology assessment on materials, cooled and un-cooled structures, especially usable on future high speed civilian aircraft. This Work Package is called WP4 and entitled "Material and structures for combustors and advanced hot structures". It deals with 3 main topics with corresponding subscale demonstrations: 4.1. Durability for Combustion loaded Non-Metallic Liners: The ERBURIGK long duration material test: on conical CMC cooled structure of PTAH-SOCAR technology and on flat material samples (CMC from different architectures and manufacturing routes). Cycling of runs of 2 hours each with oxidative high speed flow. Basic CMC material property and permeability determination at high temperature levels (cold and hot measurements of Darcy and Forchheimer permeabilities). Investigation of internal cooling pattern: highly documented Heat Transfer and Pressure Loss Experiments for Pin-Fin-Channels with air with transparent duct. 4.2. Durability for Combustion loaded Panels with Metallic Cores (hollow spheres or tubes packing) Design and Manufacture of (Un) Cooled Panels for a Realistic Environment Material development and characterization Panel manufacturing for testing Testing of manufactured Panels in a Realistic Environment (for example relevant to aircraft aftbody at Mach 6 flight conditions) 4.3. Integration and Testing of (Un)Cooled Injectors Un-cooled Sharp UHTC based Fin Injectors design and manufacturing Transpiration cooled CMC injectors design and manufacturing Feasibility Experiments of insulated injectors at USTUTT/ITLR Hot Gas Facility at Stuttgart Relevant test of several injectors in the industrial METHYLE/SMR scramjet at MBDA Bourges with fuel mixture CH4+H2. System studies from ATLLAS-1 and WP2 results are used as guidelines to define the architecture and the test condition of WP4 samples. WP4 will use the materials enhanced and characterized in WP3. WP4 will provide an interesting data base for numerical simulations in WP5.2. Other European programs could use the developed material and structures.