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Aero-Acoustics Test Programs
Aero-Acoustics Test Programs
Abstract
Foreword
Contents
Contents -Cont.
Figures
Figures -Cont.
Section 1: Introduction
Table 1 List of Symbols
Section 2: Description of Test Programs
NARF Norfolk Depot Test Cell Diagnostic Tests
MCAS Cherry Point Pegasus Demountable Cell Tests
NAS Dallas Test Cell
Section 3. Aircraft and Engine Data
Table 2. Aircraft Engine Data
Table 3 Aircraft and Enclosure Geometry Data
Section 4: Hush-House and Test Cell Geometrical Data and Instrumentation Definition
Table 4. Hush-House and Test Cell Geometrical Information
Figure 1 Miramar Layout Showing Thermocouple Locations
Figure 2 El Toro Layout Showing Thermocouple Locations
Figure 3. Miramar No.2 and El Toro Augmenter Cross-Sections Showing Rake Locations
Figure 4. Fatuxent River Layout Showing Thermocouple Locations
Figure 5 Dallas Layout Showing Thermocouple Locations
Section 5: Checkout Data Summary
Table 5. Basic Checkout Data with Alligned Aircraft
Table 5. Basic Checkout Data with Alligned Aircraft -Cont.
Section 6: Augmenter Mass Flow Rate
Figure 6. Augmenter Mass Flow Correlation with Engine Centered and Aligned
Figure 7 Augmented Mass Flow Correlation for J-79 Engine and J-79 Powered F-4
Figure 3. Augmented Mass Flow Correlation with Significant Engine Centerline Offset
Augmenter Length Selection -Cont.
Section 7: Enclosure Interior Flow Conditions
Figure 9. Cell Depression Versus Primary Inlet Flow Rate for Various Facilities
Figure 10. Cell Depression Versus Primary Inlet Specific Mass Flow Rate for Various Facilities
Figure 11. Enclosure Interior Velocity Versus Primary Mass Flow Rate for Various Facilities
Figure 12. Enclosure Interior Velocity Versus Primary Inlet Specific Mass Flow Rate for Various Facilities
Figure 13. Enclosure Interior Velocity Versus Door Outlet Specific Mass Flow Rate
Figure 14. El Toro Internal Flow Patterns with the A-6 Aircraft
Figure 15. Patuxent River Internal Flow Patterns with the 5-3A Aircraft
Figure 16. Cherry Point Engine Test Cell Internal Flow Patterns with the Pegasus Engine
Section 8: Augmenter Wall Temparature
Figure 17. Augmenter Wall Temperatured Distributors for Various Facilities with Centered and Aligned Engine
Figure 18. Augmented Wall Temperature Distributions for Various Facilities
Figure 19. Augmented Wall Temperature Distribution for Various Facilities Showing the Effect of Significant Engine Centerline Lateral Offset
Wall Temperature/Engine Nozzle Distance Correlation
Figure 20 Augmented Sidewall Temperature Distribution for F-14A Operation with One Enginein A/B
Figure 21 Maximum Augmented Wall Temperature Parameter for Various Facilities
Figure 22 Axial Location of Maximum Augmented Wall Temperature in Various Facilities for Aligned
Section 9: Augmented Exit Velocity
Figure 23. Miramar and El Toro Augmented Exit Velocity Distributions
Figure 24.Dallas Engine Test Cell Augmented Exit Velocity Distributions
Section 10: Visible Emissions
Section 11: Enclosure Interior Noise
Table 7. Summary of FAR-Field and Interior Noise Levels of Full-Scale Test Facilities
Table 7. Summary of FAR-Field and Interior Noise Levels of Full-Scale Test Facilities -Cont.
Table 7. Summary of FAR-Field and Interior Noise Levels of Full-Scale Test Facilities -Cont.
Table 7. Summary of FAR-Field and Interior Noise Levels of Full-Scale Test Facilities -Cont.
Table 8A Objectives and Key Acoustic Results of Model Studies
Table 8A Objectives and Key Acoustic Results of Model Studies -Cont.
Table 8B Objectives and Key Acoustic Results of Model Studies
Table 8C Objectives and Key Acoustic Results of Model Studies Forcing Cone Model Study
Table 9 Location of Standard Microphone Positions for Measuring Interior Noise
Enclosure Interior Noise Studies Utilizing Scale Models
Figure 25. 1/3-Octave Band Spectrum of the Interior Noise in the Miramar II Hush-House at Standard Microphone
Figure 26. Spilt of Sound Power Between Enclosure (Burner Room)
Figure 27. Effect of Axial Distance XN on the Sound Power Radiated into the Enclosure
Section 12: External Noise
Source Receiver Paths
Effect of Geometry Change on Noise
External Noise Studies Utilizing Scale Models
Figure 28. Principal Paths of Noise Radiated from A Hush-House
Figure 29. Source-Receiver for Exterior Noise in A Hush-House
Figure 30. 1/3-Octave Bank Spectrum of The Far-Field Noise
Figure 31. Effect of Axial Distance ,XN on the Sound Power Radiated into the Augmenter
Figure 32. Power-Based Insertion Loss
Bibliography
References
References -Cont.
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