NASA Technical Reports Server (NTRS) 20160003515: Boeing Smart Rotor Full-scale Wind Tunnel Test Data Report

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by  NASA Technical Reports Server (NTRS)

NASA/TM—2016–216048

Boeing SMART Rotor Full-Scale Wind
Tunnel Test Data Report

Sesi Kottapalli
Ames Research Center, Moffett Field, California

Brandon Hagerty
Universities Space Research Association
Ames Research Center, Moffett Field, California

Denise Salazar
Universities Space Research Association
Ames Research Center, Moffett Field, California
and
The University of Texas at Austin, Austin, Texas

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January 2016
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NASA/TM—2016–216048

Boeing SMART Rotor Full-Scale Wind
Tunnel Test Data Report

Sesi Kottapalli
Ames Research Center, Moffett Field, California

Brandon Hagerty
Universities Space Research Association
Ames Research Center, Moffett Field, California

Denise Salazar
Universities Space Research Association
Ames Research Center, Moffett Field, California
and
The University of Texas at Austin, Austin, Texas

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National Aeronautics and
Space Administration

Ames Research Center

Moffett Field, CA 94035-1000
January 2016
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TABLE OF CONTENTS

LIST OF FIGURES .............................................................................................................................. v
LIST OF TABLES ................................................................................................................................ v
NOMENCLATURE ........................................................................................................................... vii
SUMMARY .......................................................................................................................................... 1
INTRODUCTION ................................................................................................................................ 1
1992 MDART Rotor Test ................................................................................................................. 2
DESCRIPTION OF EXPERIMENT .................................................................................................... 2
Test Setup ......................................................................................................................................... 3
Rotor Hardware ................................................................................................................................ 3
Piezoelectric On-Blade Actuators ..................................................................................................... 3
Data Channels ................................................................................................................................... 4
Microphones ..................................................................................................................................... 4
Data Acquisition Systems and Post-Test Data Processing ............................................................... 4
Application of Tares ......................................................................................................................... 5
DATA ANALYSIS............................................................................................................................... 6
PRESENTED DATA ............................................................................................................................ 7
Definition of Flap Deflection ............................................................................................................ 7
Flap Data (Table 4 and Appendix A) ............................................................................................... 8
Primary Data (Appendices B and C) ................................................................................................ 8
Rotor Smoothing Data (Appendices D and E) ................................................................................. 8
Performance Data (Appendices F and G) ......................................................................................... 9
Vibration Reduction Data (Appendices H and I) ............................................................................. 9
Control Power Data (Appendices J and K) ..................................................................................... 10
REFERENCES ................................................................................................................................... 38

APPENDIX A—FLAP DATA ………........................................................................................... A 1

APPENDIX B—PRIMARY STATIC DATA ................................................................................ B 1
APPENDIX C PART 1—PRIMARY DYNAMIC DATA PART 1 .................................. CD ONLY
APPENDIX C PART 2—PRIMARY DYNAMIC DATA PART 2 .................................. CD ONLY
APPENDIX D—ROTOR SMOOTHING STATIC DATA ........................................................... D 1

APPENDIX E—ROTOR SMOOTHING DYNAMIC DATA .......................................... CD ONLY
APPENDIX F—PERFORMANCE STATIC DATA ..................................................................... F 1
APPENDIX G—PERFORMANCE DYNAMIC DATA ................................................... CD ONLY
iii
TABLE OF CONTENTS (cont.)

APPENDIX H—VIBRATION REDUCTION STATIC DATA .................................................... H 1
APPENDIX I—VIBRATION REDUCTION DYNAMIC DATA .................................... CD ONLY
APPENDIX J—CONTROL POWER STATIC DATA .................................................................. J 1
APPENDIX K—CONTROL POWER DYNAMIC DATA ............................................... CD ONLY
iv
LIST OF FIGURES

Figure 1. Boeing SMART rotor with active trailing-edge flaps in the NFAC 40- by 80-Foot
Wind Tunnel. ...................................................................................................................... 35
Figure 2. Boeing SMART rotor mounted on the LRTS in the NFAC 40- by 80-Foot Wind
Tunnel................................................................................................................................. 36
Figure 3. Blade-mounted Instrumentation. ........................................................................................ 36
Figure 4. Top view of the test setup of the microphone layout with rotor hub at α = 0 deg. ......... 37
su

LIST OF TABLES

Table 1. Boeing SMART rotor and active flap characteristics ........................................................ 11
Table 2a. Weight and aerodynamic tare runs ..................................................................................... 12
Table 2b. Tare equations and definitions ........................................................................................... 13
Table 2c. Weight tare coefficients, hub only ..................................................................................... 13
Table 2d. Weight tare coefficients, hub and blades ........................................................................... 14
Table 2e. Aero tare coefficients, low Q and high Q ........................................................................... 14
Table 3. Parameters and constraints used in data selection and analysis ......................................... 15
Table 4. Amplitude and phase data for blade#1 flap (FLAP1C_TS) ............................................... 16
Table 5. Static data parameters and descriptions ............................................................................. 31
Table 6. Dynamic data parameters and descriptions ........................................................................ 32

v
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NOMENCLATURE

CT rotor thrust coefficient, + up
CTHHC Continuous Time Higher Harmonic Controller
CTOS rotor thrust coefficient over solidity, C /σ, + up
T
Harmonics flap frequency in cycles per rotor revolution
HP horsepower from rotor torque
MDART McDonnell Douglas Advanced Rotor Technology
MU rotor advance ratio, tunnel speed/OMR
n harmonic index (0 to N) or harmonic frequency n/rev, also nP
OMR rotor tip speed (ft/s)
PCM pulse-code modulation
PS static pressure at tunnel centerline (psfa)
Q corrected tunnel dynamic pressure (psf)
RDMS Rotor Data Management System
RPM rotor RPM, + counterclockwise from top
SMART Smart Material Actuated Rotor Technology
THRUST rotor thrust force parallel to rotor shaft, + up (lbf)
TORQ rotor torque, + drag (in-lbf)
VKTS tunnel speed (knots)
α uncorrected shaft angle-of-attack, + aft tilt (deg)
su
σ rotor solidity, blade area/disc area
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