| Boyd, D. D., and Barnwell, R. W., "Rotor-Fuselage Interactional Aerodynamics: An Unsteady Rotor Model," AHS 54th Annual Forum, Washington, D.C., 20 - 22 May, 1998. |
| Boyd, D. D., Brooks, T. F., Burley, C. L., and Jolly, J. R., "Aeroacoustic Codes for Rotor Harmonic and BVI Noise - CAMRAD.Mod1/HIRES: Methodology and Users' Manual," NASA/TM-1998-207640, March, 1998. NTRS |
| Brentner, K. S., and Farassat, F., "Analytical Comparison of the Acoustic Analogy and Kirchhoff Formulation for Moving Surfaces," AIAA Journal, Vol. 36, No. 8, pp. 1379 - 1386, August, 1998. DOI |
| Dunn, M. H., and Farassat, F., "Liner Optimization Studies Using the Ducted Fan Noise Prediction Code TBIEM3D," AIAA Paper 98-2310, 4th AIAA/CEAS Aeroacoustics Conference, Toulouse, France, 2 - 4 June, 1998. DOI NTRS |
| Farassat, F., and Baty, R. S., "The Application of Nonstandard Analysis to the Study of Inviscid Shock Wave Jump Conditions," 51st Annual Meeting of the APS Division of Fluid Mechanics, Philadelphia, Pennsylvania, 22 - 24 November, 1998. NTRS |
| Farassat, F., and Brentner, K. S., "Supersonic Quadrupole Noise Theory for High-Speed Helicopter Rotors," Journal of Sound and Vibration, Vol. 218, No. 3, pp. 481 - 500, December, 1998. DOI |
| Farassat, F., and Brentner, K. S., "The Acoustic Analogy and the Prediction of the Noise of Rotating Blades," Theoretical and Computational Fluid Dynamics, Vol. 10, pp. 155 - 170, January, 1998. DOI |
| Farassat, F., Brentner, K. S., and Dunn, M. H., "A Study of Supersonic Surface Sources - The Ffowcs Williams-Hawkings Equation and the Kirchoff Formula," AIAA Paper 98-2375, 4th AIAA/CEAS Aeroacoustics Conference, Toulouse, France, 2 - 4 June, 1998. DOI NTRS |
| Humphreys, W. M., Brooks, T. F., Hunter, W. W., and Meadows, K. R., "Design and Use of Microphone Directional Arrays for Aeroacoustic Measurements," AIAA Paper 98-471, 36th AIAA Aerospace Sciences Meeting, Reno, Nevada, 12 - 15 January, 1998. DOI NTRS |
| Posey, J. W., Dunn, M. H., and Farassat, F., "Quantification of Inlet Impedance Concept and a Study of the Rayleigh Formula for Noise Radiation from Ducted Fan Engines," AIAA Paper 98-2248, 4th AIAA/CEAS Aeroacoustics Conference, Toulouse, France, 2 - 4 June, 1998. DOI NTRS |
| Rumsey, C. L., Biedron, R. T., Farassat, F., and Spence, P. L., "Ducted-Fan Engine Acoustic Predictions Using a Navier-Stokes Code," Journal of Sound and Vibration, Vol. 213, No. 4, pp. 643 - 664, June, 1998. DOI NTRS |