1. P&W Expectations for QAT AST was a successful NASA/Industry program, provides a blueprint for QAT QAT is funded at 1/2 of AST Noise Element, that has an impact on expectations The engines make most of the noise, therefore engine noise-reduction technology will be at least 50% of QAT There is a parallel NASA UEET engine program, QAT and UEET will be tightly integrated AST Engine Noise/Propulsion Elements focussed on noise/NOX, QAT/UEET will focus on noise/NOX/CO2/GCC, thus increased emphasis on reducing fuel burn W. K. Lord 4/11/00

2. NASA Technology Programs Have Led the Way to Significant Noise Reduction 777-200 A330-300 MD-90-30 MD-11 A320-200 747-400 A300-600R 767-300ER A310-300 757-200 MD-87 MD-82 B-747-300 A300B4-620 A310-222 MD-80 B-747-200 B-747-SP DC-10-40 B-747-200 A300 B-747-200 B-747-100 B-737-200 B-727-200 DC9-10 B-727-100 -60.0 -50.0 -40.0 -30.0 -20.0 -10.0 0.0 10.0 20.0 30.0 40.0 1960197019801990200020102020 Year of Certification Cum. Noise Margin relative to Chapter 3 (EPNdB) XXX/PW8060 YYY/PW8033 A318/PW6000(est) 777/GE90 8D ReFan NASA BASE R&TLET AST QAT Goal QAT Goal AST Goal AST Goal

3. Low Speed Fan High Speed Turbine …Enabler For Ultra-high Bypass Ratio Engines Fan Drive Gear System Reduces Noise By Reducing Fan Tip Speed...

4. Geared Fixed-Pitch Fan with Variable Nozzle Potential PW Focus for QAT/UEET Program High-BPR Cycle benefits fan & jet noise Engine Component Technology airfoil count optimization (fan,LPC,LPT) airfoil 3D geometry airfoil wake management Nacelle/Installation Technology advanced acoustic liners scarf inlet variable-area fan nozzle contoured core nozzle LWT, HWT, or BWB airframe

5. Acoustic Response and Radiation Model LES Flow Field, Axisymmetric Jet CAA Technology Level Today Is Where CFD Was In 1980 Computational Aero-acoustic Modeling Physics-based Tool Revolutionizing Acoustic Technology Development Fan Noise: Fan Rotor / Stator Interaction Tone Noise Fan Broadband Noise Model Jet Noise: Near Term Methods based on Reynolds-avg CFD Longer Term: Large-Eddy Simulation (LES)

6. QAT Program Content Yr 2000 system studies -set technical direction Technology development/ demonstration -model scale e.g. 22” fan rig in 9x15 jet noise in NATR -full scale demo (UEET engine) core & turbomachinery (LPC/LPT) noise computational methods development