Supersonic Technology Development Supersonic Technology Development - - PowerPoint PPT Presentation

Supersonic Technology Development Supersonic Technology Development

Gulfstream Aerospace Corporation FAA Public Meeting – Supersonics July 14, 2011 / Washington, DC

Gulfstream Proprietary Information

0.0 0.5 1.0 1.5 2.0 2.5 3.0 200000 400000 600000 800000

Initial Cruise Weight - lb

Initial Shock Strength - psf Concorde HSCT SBJ QSJ Shaped QSJ Advanced Concepts

Initial Cruise Sonic Boom Strength

DARPA QSP Goal

• Advantages

– Smaller Aircraft Reduced Sonic Boom – Lower Speed Less Complexity (Inlets, Materials, Etc.)

Civil Supersonics / Concorde is Gone – What Now? Civil Supersonics / Concorde is Gone – What Now?

• Gulfstream Perspective…

Quiet Supersonic Jet (QSJ)

– Different Market

• Business Jet: Speed is

Important & Affordable

– Different Requirements

• High Speed Civil Transport:

Mach 2.4, 600K airliner

• Quiet Supersonic Jet:

Mach 1.8, 100K transport Better Chance at Enabling Acceptable Supersonic Civil Aircraft Better Chance at Enabling Acceptable Supersonic Civil Aircraft Better Chance at Enabling Acceptable Supersonic Civil Aircraft

Gulfstream Proprietary Information

Supersonic Configuration

       



Anchorage Los Angeles Beijing Delhi Hong Kong Manila Tokyo Moscow

NEW YORK NEW YORK

5 Hours 10 Hours

Tokyo Tokyo Beijing Beijing Hong Kong Hong Kong Manila Manila Delhi Delhi Moscow Moscow Anchorage Anchorage Los Angeles Los Angeles

Westbound from New York

         



Beijing Delhi Hong Kong Dubai Casablanca Cairo Johannesburg London Moscow Rome

NEW YORK NEW YORK

5 Hours 10 Hours

Dubai Dubai Beijing Beijing Hong Kong Hong Kong Delhi Delhi London London Moscow Moscow Casablanca Casablanca Johannesburg Johannesburg Cairo Cairo Rome Rome

Eastbound from New York

Worldwide Coverage in 10 Hours

* Assumes Mach 1.8 over land, 4,800 nm range capability

5 Hour Range Circle  Day Trip There and back with 2 hours on location

Redefining the Speed Envelope Redefining the Speed Envelope

Supersonic Overland Is Key – Requires Regulatory Change Supersonic Overland Is Key Supersonic Overland Is Key – – Requires Regulatory Change Requires Regulatory Change

† CFR Part 91.817 explicitly prohibits aircraft operation in US airspace at flight speeds > Mach 1

Gulfstream Proprietary Information

QSJ

Redefining the Speed Envelope Redefining the Speed Envelope

Today’s Reality Tomorrow’s Vision Manage Environmental Impacts Through Design Requirements Manage Environmental Impacts Through Design Requirements Manage Environmental Impacts Through Design Requirements Cruise Speed

0.90 M 1.80 M 1.80 M

Environmental Considerations Requirement

• Boom Overpressure

Acceptable for Overland SS Flight

• Takeoff Emissions

ICAO with Margin

• Cruise Emissions

Minimum Impact

• Airport Noise

Stage 4 with 10dB Margin

Gulfstream Proprietary Information

Supersonic Technology Development

Objective: Conduct basic research into reducing the impact of sonic boom on people and the environment to enable regulatory change for supersonic flight

• verland, domestically and internationally

Objective: Conduct basic research into reducing the impact of sonic boom on reducing the impact of sonic boom on people and the environment people and the environment to enable regulatory change for supersonic flight

• verland, domestically and internationally

Gulfstream Proprietary Information

Sonic Boom Suppression Sonic Boom Suppression

• Gulfstream Quiet Spike™

– Extendable Nose Spike – Generate Series Of Weak Shocks – Propagate Parallel To Each Other – Transform Sharp Crack Into Quiet Whisper

Quiet Spike Without Spike

NASA LaRC UPWT

0.05 0.1 0.15 0.2 0.25 0.3

• 2.0
• 1.5
• 1.0
• 0.5

0.0 0.5 1.0 1.5 2.0

Time (seconds) Delta Pressure (psf)

Concorde SBJ w/ No Shaping QSJ w/ Quiet Spike

Gulfstream Proprietary Information

Quiet Spike Flight Test

• 0.06
• 0.04
• 0.02

0.00 0.02 0.04 0.06 0.08

• 10

10 20 30 40 50 60 70 80 90 100

Xcone ~ feet P/P

Probing Sig. #10 at D-av = 95 ft. 3-D Hybrid CFD - Interpolated to #10

Comparison of CFD-Predicted vs. Measured Near-field Signature

Photo: NASA Dryden Flight Research Center

2008 Laureate Award Aviation Week & Space Technology

Excellent Correlation & Flight Validation of Sonic Boom Suppression Excellent Correlation & Flight Excellent Correlation & Flight Validation of Sonic Boom Suppression Validation of Sonic Boom Suppression

Gulfstream Proprietary Information

50 55 60 65 70 75 80 85 90 95 100 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

PLdB w/o U-wave

Acceptability

Acceptable 24/7 Absolutely Not Allowable Marginal Acceptable Day Time Not Acceptable

< 70 PLdB

50% Acceptance 95% Acceptance

Low Boom Simulation & Preliminary Flight Results Independently Point Toward Signature Levels ~ 70 PLdB Low Boom Simulation & Preliminary Flight Results Low Boom Simulation & Preliminary Flight Results Independently Point Toward Signature Levels ~ 70 PLdB Independently Point Toward Signature Levels ~ 70 PLdB

Preliminary Outdoor Loudness Assessment

NASA F-18 Low Boom Flight Test – October 2005

Boom Sound Levels

40 50 60 70 80 90 100 110 120 HSCT Concorde SBJ QSJ shaped QSJ advanced QSJ advanced+

Configuration dB

PLdB dB(A)

Talking City Traffic

dB(A)

>35dB Reduction

Boom Sound Levels

40 50 60 70 80 90 100 110 120 HSCT Concorde SBJ QSJ shaped QSJ advanced QSJ advanced+

Configuration dB

PLdB dB(A)

Talking City Traffic

dB(A)

>35dB Reduction

Gulfstream Signature Development & Simulation

Gulfstream Proprietary Information

Global Impact Assessment Global Impact Assessment

Low Boom Signature Robust in Non-Standard Atmosphere Low Boom Signature Low Boom Signature Robust in Non Robust in Non-

• Standard

Standard Atmosphere Atmosphere

0.05 0.1 0.15 0.2

• 0.8
• 0.6
• 0.4
• 0.2

0.0 0.2 0.4 0.6 0.8

Time (sec) Delta Pressure (psf)

• St. Helena Island (summ) 58.6 PL(dB)

Oimakon, Russia (wint) 69.5 PL(dB)

• Std. Atm. 66.8 PL(dB)

50 60 70 80 90 100 110 PL (dB) N-wave, 90 deg hdg, M N-wave, 90 deg hdg, Ju N-wave, 90 deg hdg, S N-wave, 90 deg hdg, D N-wave, 270 deg hdg, M N-wave, 270 deg hdg, Ju N-wave, 270 deg hdg, Se N-wave, 270 deg hdg, De Case 432, 90 deg hdg, Case 432, 90 deg hdg, Case 432, 90 deg hdg, Case 432, 90 deg hdg, Case 432, 270 deg hdg, Case 432, 270 deg hdg, Case 432, 270 deg hdg, Case 432, 270 deg hdg,

110 100 90 80 60 50 70 Perceived Loudness (PLdB) 20 40 60 80

• 20
• 40
• 60
• 80

Latitude

QSJ, Std. Atm.: <70 PLdB Concorde, Std. Atm.: >105 PLdB

Gulfstream Proprietary Information

Partnering For Quiet Supersonic Flight Partnering For Quiet Supersonic Flight

Pioneering Low Boom Supersonic Research Pioneering Low Boom Supersonic Research Innovative Low Boom Propulsion Development & Testing Innovative Low Boom Propulsion Development & Testing Key Scientific & Key Scientific & Regulatory Partnerships Regulatory Partnerships

Gulfstream Proprietary Information

Summary

• Continued Market / Industry Interest

in Future Supersonic Concepts – Supersonic Overland Flight is Required – Manage Environmental Design Requirements for Success

• Promising Research Results in

Sonic Boom Suppression – Validated Quiet Spike Technology – Acceptable Noise Level Achieved Through Low Boom Shaping

Quiet Spike Video

Gulfstream Proprietary Information

Questions ? Questions ?