IGF::OT::IGF TASK TITLE: REDUCING RISK TO ACHIEVING THE NASA N2 NOISE GOAL. 1.0 INTRODUCTION/BACKGROUND:NASAS ENVIRONMENTALLY RESPONSIBLE AVIATION (ERA) PROJECT HAS FOCUSED ON DEVELOPING AND DEMONSTRATING TECHNOLOGIES FOR INTEGRATED AIRCRAFT SYSTEMS. THE FUEL BURN GOAL IS A REDUCTION BY 50 RELATIVE TO A BEST IN FLEET AIRCRAFT IN 2005, THE NOISE GOAL IS 42 DECIBELS (DB) CUMULATIVE RELATIVE TO THE FEDERAL AVIATION ADMINISTRATIONS STAGE 4 REQUIREMENT, AND THE EMISSIONS GOAL IS FOR A REDUCTION OF 75 IN NITROUS OXIDE BELOW THE COMMITTEE ON AVIATION ENVIRONMENTAL PROTECTION STANDARD NUMBER 6 (CAEP6). THE TARGET DATE IS 2020 FOR KEY TECHNOLOGIES TO BE AT A TECHNOLOGY READINESS LEVEL (TRL) OF FOUR TO SIX (I.E., SYSTEM OR SUB-SYSTEM PROTOTYPE DEMONSTRATED IN A RELEVANT ENVIRONMENT). THIS CORRESPONDS TO A PROJECTED AIRCRAFT ENTRY INTO SERVICE NO EARLIER THAN 2025. THESE GOALS AND TIMEFRAME ARE DEFINED BY NASA AS N21. THIS EFFORT BUILDS UPON PREVIOUS CONTRACT WORK BY BOEING. THE HYBRID WING BODY (HWB) AIRCRAFT WAS PREVIOUSLY IDENTIFIED AS ONE CONCEPT THAT HAS THE POTENTIAL TO MEET THE ERA PROJECTS AIRCRAFT NOISE GOAL. NASA PUBLISHED IN AMERICAN INSTITUTE OF AERONAUTICS AND ASTRONAUTICS (AIAA) PAPER NUMBERS 2010-3912 AND 2010-3913 RESULTS SHOWING A TECHNICAL PATH FOR THE HWB CONCEPT TO MEET THE 42 DB GOAL. UNDER THE ERA ADVANCED VEHICLE CONFIGURATIONS (AVC) TASK THE ADVANCED HWB AIRCRAFT CONCEPT PROPOSED BY BOEING WAS SHOWN TO MEET ALL THREE OF THE ERA N2 GOALS SIMULTANEOUSLY. NASA HAS PARTICIPATED IN A DETAILED AND UPDATED NOISE ASSESSMENT THAT WAS PUBLISHED AS AIAA PAPER 2014-0365 (GUO, BURLEY, AND THOMAS) INCLUDING COMPARISON WITH THE PREVIOUS NASA NOISE ASSESSMENT. FINALLY, UNDER SMAAART TASK ORDER NNL13AB86T, BOEING IS CURRENTLY WORKING WITH AN UPDATED DESIGN OF ITS HWB PREFERRED SYSTEM CONCEPT (PSC) AIRCRAFT WITH IMPROVED DESIGN FEATURES INCLUDING A KRUEGER FLAP LEADING EDGE, AN IMPROVED ENGINE SELECTION, AND IMPROVED ENGINE/AIRFRAME INTEGRATION.IN REVIEW OF THE ABOVE RESEARCH, NASA HAS IDENTIFIED FOUR CRITICAL AREAS NEEDED TO IMPROVE NASAS CURRENT SYSTEM NOISE ASSESSMENT METHODOLOGY. ALSO, INVESTIGATION OF NOISE REDUCTION APPROACHES IN THESE FOUR AREAS WILL RESULT IN HIGHER CONFIDENCE NOISE ASSESSMENTS RELATIVE TO MEETING THE 42 DB GOAL. IT IS OF ADDITIONAL VALUE TO NASA THAT THE RESULTS FROM THIS TASK WILL ALSO BE APPLICABLE TO ASSESSMENTS OF OTHER ADVANCED AIRCRAFT CONCEPTS. THE OVERALL PURPOSE OF THIS TASK ORDER IS TO REDUCE THE RISK TO ACHIEVING THE 42 DB GOAL BASED ON THE MOST ADVANCED ASSESSMENTS TO BE DONE BY NASA ON THE ERA VEHICLE CONCEPTS. 1.NASAS RESEARCH FOCUSES ON FUTURE AIRCRAFT DESIGN CONCEPTS AND TECHNOLOGY THAT COULD BE INTRODUCED INTO SERVICE IN 2020, 2025 AND 2030. THE FIRST NEXT GENERATION FOR 2020 IS REFERRED TO AS N1. THE SECOND GENERATION IS N2. THE THIRD AND FARTHEST OUT GENERATION IS N3. EACH DESIGN GENERATION OFFERS TECHNOLOGY FEATURES MORE SOPHISTICATED THAN THOSE OF THE GENERATION BEFORE. 2.0 SCOPE&OBJECTIVE(S):2.1THE SCOPE OF THIS TASK ORDER IS LIMITED TO USING BOEINGS HWB PSC IN THE FOLLOWING FOUR TECHNICAL AREAS THAT HAVE BEEN IDENTIFIED AS CRITICAL TO IMPROVING THE CURRENT STATE OF THE ART OF NASAS AIRCRAFT SYSTEM NOISE ASSESSMENTS, TO ACHIEVE THE 42 DB NOISE GOAL. 1.HIGH FIDELITY ULTRA-HIGH BYPASS (UHB) FAN NOISE SHIELDING EFFECTIVENESS. 2.AIRFRAME SYSTEM DATABASE WITH COMPONENT NOISE RANKING. 3.KRUEGER FLAP NOISE. 4.FLIGHT PATH AND SYSTEM NOISE OPTIMIZATION. THE CONTRACTOR SHALL UTILIZE COMPUTATIONAL AND ANALYTICAL MODELING METHODS AND ANALYSIS OF EXISTING EXPERIMENTAL AND SIMULATION DATA IN CONDUCTING THE WORK UNDER THIS SOW. 2.2THE OBJECTIVES OF THIS TASK ORDER ARE TO: 1. DEVELOP SHIELDING SUPPRESSION MAPS FROM HIGH FIDELITY SIMULATIONS OF UHB AFT RADIATED FAN NOISE THAT ARE TO BE USED IN SYSTEM NOISE ASSESSMENTS.2. DEVELOP AND PREDICT THE PERFORMANCE OF A CONC