P00003 IN THIS PROJECT, OUR CENTRAL OBJECTIVE IS TO DEVELOP NEXT-GENERATION ACOUSTIC LINERS TO HELP QUIETEN AIRCRAFT ENGINES. TO THIS END, WE WILL DEVELOP LIGHTWEIGHT, MINIMAL THICKNESS LINERS USING ADVANCED CELLULAR POROUS MATERIALS ENGINEERED TO PROVIDE HIGH SOUND ABSORPTION OVER A WIDE FREQUENCY RANGE AND CAPABLE OF WITHSTANDING EXTREME ENGINE ENVIRONMENTS. CELLULAR MATERIALS OFFER A DISTINCT ADVANTAGE OVER TRADITIONAL LINER MATERIALS: THEIR STRUCTURAL AND FUNCTIONAL PROPERTIES ARE DIRECTLY CONTROLLED BY THEIR LOCAL MICROSTRUCTURAL ARCHITECTURE. THUS, BY ENGINEERING THEIR MICROSTRUCTURE, THEY CAN BE TAILORED TO PROVIDE SIGNIFICANTLY ENHANCED PROPERTIES WITHOUT PARASITIC MASS ADDITION. HERE, OUR FOCUS WILL BE ON THREE CELLULAR MATERIAL SYSTEMS: (A) OPEN-CELLED METAL FOAMS (B) 3D PRINTED POLYMERIC BULK ABSORBERS AND (C) AEROGEL-BASED STRUCTURES. THE KEY RESEARCH OBJECTIVES ARE: (1) DESIGN, FABRICATE, AND TEST OPENCELLED FOAM-METAL LINERS WITH VARIABLE THROUGH-THICKNESS PROPERTIES (2) LEVERAGE 3D PRINTING TECHNIQUES TO DESIGN NEW BULK ABSORBERS WITH NOVEL LOCAL TOPOLOGICAL SURFACES AND (3) DESIGN AND FABRICATE ULTRA-LIGHTWEIGHT AEROGEL-BASED BULK ABSORBERS FOR AIRCRAFT LINER APPLICATIONS. THESE OBJECTIVES WILL BE ACHIEVED BY COMBINING EXPERIMENTAL AND QUANTITATIVE TECHNIQUES TO UNDERSTAND THE ROLE PLAYED BY THE ABSORBER S CELLULAR TOPOLOGY ON ITS ACOUSTIC PROPERTIES. THE INSIGHTS GAINED WILL BE USED TO DESIGN MINIMAL THICKNESS ACOUSTIC LINERS WITH EXCEPTIONAL NOISE ATTENUATION CAPABILITIES. Funding Only Action ($28k) 5/9/23 Not listed IN THIS PROJECT OUR CENTRAL OBJECTIVE IS TO DEVELOP NEXT-GENERATION ACOUSTIC LINERS TO HELP QUIETEN AIRCRAFT ENGINES. TO THIS END WE WILL DEVELOP LIGHTWEIGHT MINIMAL THICKNESS LINERS USING ADVANCED CELLULAR POROUS MATERIALS ENGINEERED TO PROVIDE HIGH SOUND ABSORPTION OVER A WIDE FREQUENCY RANGE AND CAPABLE OF WITHSTANDING EXTREME ENGINE ENVIRONMENTS. CELLULAR MATERIALS OFFER A DISTINCT ADVANTAGE OVER TRADITIONAL LINER MATERIALS: THEIR STRUCTURAL AND FUNCTIONAL PROPERTIES ARE DIRECTLY CONTROLLED BY THEIR LOCAL MICROSTRUCTURAL ARCHITECTURE. THUS BY ENGINEERING THEIR MICROSTRUCTURE THEY CAN BE TAILORED TO PROVIDE SIGNIFICANTLY ENHANCED PROPERTIES WITHOUT PARASITIC MASS ADDITION. HERE OUR FOCUS WILL BE ON THREE CELLULAR MATERIAL SYSTEMS: (A) OPEN-CELLED METAL FOAMS (B) 3D PRINTED POLYMERIC BULK ABSORBERS AND (C) AEROGEL-BASED STRUCTURES. THE KEY RESEARCH OBJECTIVES ARE: (1) DESIGN FABRICATE AND TEST OPENCELLED FOAM-METAL LINERS WITH VARIABLE THROUGH-THICKNESS PROPERTIES (2) LEVERAGE 3D PRINTING TECHNIQUES TO DESIGN NEW BULK ABSORBERS WITH NOVEL LOCAL TOPOLOGICAL SURFACES AND (3) DESIGN AND FABRICATE ULTRA-LIGHTWEIGHT AEROGEL-BASED BULK ABSORBERS FOR AIRCRAFT LINER APPLICATIONS. THESE OBJECTIVES WILL BE ACHIEVED BY COMBINING EXPERIMENTAL AND QUANTITATIVE TECHNIQUES TO UNDERSTAND THE ROLE PLAYED BY THE ABSORBER S CELLULAR TOPOLOGY ON ITS ACOUSTIC PROPERTIES. THE INSIGHTS GAINED WILL BE USED TO DESIGN MINIMAL THICKNESS ACOUSTIC LINERS WITH EXCEPTIONAL NOISE ATTENUATION CAPABILITIES. $0 5/9/23 Not listed IN THIS PROJECT OUR CENTRAL OBJECTIVE IS TO DEVELOP NEXT-GENERATION ACOUSTIC LINERS TO HELP QUIETEN AIRCRAFT ENGINES. TO THIS END WE WILL DEVELOP LIGHTWEIGHT MINIMAL THICKNESS LINERS USING ADVANCED CELLULAR POROUS MATERIALS ENGINEERED TO PROVIDE HIGH SOUND ABSORPTION OVER A WIDE FREQUENCY RANGE AND CAPABLE OF WITHSTANDING EXTREME ENGINE ENVIRONMENTS. CELLULAR MATERIALS OFFER A DISTINCT ADVANTAGE OVER TRADITIONAL LINER MATERIALS: THEIR STRUCTURAL AND FUNCTIONAL PROPERTIES ARE DIRECTLY CONTROLLED BY THEIR LOCAL MICROSTRUCTURAL ARCHITECTURE. THUS BY ENGINEERING THEIR MICROSTRUCTURE THEY CAN BE TAILORED TO PROVIDE SIGNIFICANTLY ENHANCED PROPERTIES WITHOUT PARASITIC MASS ADDITION. HERE OUR FOCUS WILL BE ON THREE CELLULAR MATERIAL SYSTEMS: (A) OPEN-CELLED METAL FOAMS (B) 3D PRINTED POLYMERIC BULK ABSORBERS AND (C) AEROGEL-BASED STRUCTURES. THE KEY RESEARCH OBJECTIVES ARE: (1) DESIGN FABRICATE AND TEST OPENCELLED FOAM-METAL LINERS WITH VARIABLE THROUGH-THICKNESS PROPERTIES (2) LEVERAGE 3D PRINTING TECHNIQUES TO DESIGN NEW BULK ABSORBERS WITH NOVEL LOCAL TOPOLOGICAL SURFACES AND (3) DESIGN AND FABRICATE ULTRA-LIGHTWEIGHT AEROGEL-BASED BULK ABSORBERS FOR AIRCRAFT LINER APPLICATIONS. THESE OBJECTIVES WILL BE ACHIEVED BY COMBINING EXPERIMENTAL AND QUANTITATIVE TECHNIQUES TO UNDERSTAND THE ROLE PLAYED BY THE ABSORBER S CELLULAR TOPOLOGY ON ITS ACOUSTIC PROPERTIES. THE INSIGHTS GAINED WILL BE USED TO DESIGN MINIMAL THICKNESS ACOUSTIC LINERS WITH EXCEPTIONAL NOISE ATTENUATION CAPABILITIES. ($28k) 5/9/23 P00002 IN THIS PROJECT, OUR CENTRAL OBJECTIVE IS TO DEVELOP NEXT-GENERATION ACOUSTIC LINERS TO HELP QUIETEN AIRCRAFT ENGINES. TO THIS END, WE WILL DEVELOP LIGHTWEIGHT, MINIMAL THICKNESS LINERS USING ADVANCED CELLULAR POROUS MATERIALS ENGINEERED TO PROVIDE HIGH SOUND ABSORPTION OVER A WIDE FREQUENCY RANGE AND CAPABLE OF WITHSTANDING EXTREME ENGINE ENVIRONMENTS. CELLULAR MATERIALS OFFER A DISTINCT ADVANTAGE OVER TRADITIONAL LINER MATERIALS: THEIR STRUCTURAL AND FUNCTIONAL PROPERTIES ARE DIRECTLY CONTROLLED BY THEIR LOCAL MICROSTRUCTURAL ARCHITECTURE. THUS, BY ENGINEERING THEIR MICROSTRUCTURE, THEY CAN BE TAILORED TO PROVIDE SIGNIFICANTLY ENHANCED PROPERTIES WITHOUT PARASITIC MASS ADDITION. HERE, OUR FOCUS WILL BE ON THREE CELLULAR MATERIAL SYSTEMS: (A) OPEN-CELLED METAL FOAMS (B) 3D PRINTED POLYMERIC BULK ABSORBERS AND (C) AEROGEL-BASED STRUCTURES. THE KEY RESEARCH OBJECTIVES ARE: (1) DESIGN, FABRICATE, AND TEST OPENCELLED FOAM-METAL LINERS WITH VARIABLE THROUGH-THICKNESS PROPERTIES (2) LEVERAGE 3D PRINTING TECHNIQUES TO DESIGN NEW BULK ABSORBERS WITH NOVEL LOCAL TOPOLOGICAL SURFACES AND (3) DESIGN AND FABRICATE ULTRA-LIGHTWEIGHT AEROGEL-BASED BULK ABSORBERS FOR AIRCRAFT LINER APPLICATIONS. THESE OBJECTIVES WILL BE ACHIEVED BY COMBINING EXPERIMENTAL AND QUANTITATIVE TECHNIQUES TO UNDERSTAND THE ROLE PLAYED BY THE ABSORBER S CELLULAR TOPOLOGY ON ITS ACOUSTIC PROPERTIES. THE INSIGHTS GAINED WILL BE USED TO DESIGN MINIMAL THICKNESS ACOUSTIC LINERS WITH EXCEPTIONAL NOISE ATTENUATION CAPABILITIES. Other Administrative Action $0 5/9/23 P00001 IN THIS PROJECT, OUR CENTRAL OBJECTIVE IS TO DEVELOP NEXT-GENERATION ACOUSTIC LINERS TO HELP QUIETEN AIRCRAFT ENGINES. Other Administrative Action $0 4/20/22