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A -- ADVANCED SUBSONIC TECHNOLOGIES PROGRAM ENGINE VALIDATION OF NOISE REDUCTION CONCEPTS SOL NRA 97-LERC-1 POC Andrew M. Hubbard, Contracting Officer, (216) 433-2809, Mail Stop 500- 305, or Internet E-Mail: Andrew.M.Hubbard@lerc.nasa.gov. This NASA Research Announcement (NRA) will solicit research proposals for the validation of concepts and technologies relevant to the next generation of U.S. subsonic commercial engines. These technologies are critical for the U.S. aeropropulsion industry to maintain their global competitive advantage. The objective of the program is to validate in an Engine Test noise reduction concepts and technologies that have evolved from model testing. Model test have been performed to develop fan and jet noise reduction concepts through advanced fan stage designs, mixers, active noise control, and liners. The Advanced Subsonic Technologies' Noise Reduction Program goal is to validate technology that reduces engine noise 6EPNdB and improves nacelle suppression effectiveness by 50% relative to 1992 technology. In order to meet program goals, it is necessary to validate one or more of the following technologies: 1) Fan source reduction using advanced low-noise fan stage design, 2) Jet noise suppression for mixed or separate flow exhaust, 3) Fan source reduction using active noise control, and 4) Fan source suppression using advanced acoustic treatment. It is desirable to identify engines that can either be furnished at no cost to the program and/or be tested in conjunction with another test program. Engine tests need to be done, either statically or in a large aeroacoustic wind tunnel, to verify that model data results can be realized in an engine environment. The Government contemplates ''Contractor Teams'' which include as wide a spectrum of organizations as is consistent with meeting the technical goals. Team approach may be in the form of partnership, cooperative agreement, joint venture, contractor/subcontractor arrangement, or combinations of any of the foregoing approaches. Also, it has been determined that a minimum goal of 8 percent subcontracting for small and disadvantaged businesses will be included as part of this NRA. An ombudsman has been appointed to hear concerns from offerors, potential offerors and contractors during the preaward and postaward phases of this acquisition. HOWEVER, BEFORE CONSULTING WITH ANY OMBUDSMAN, parties should first address their concerns, issues, disagreements, and/or recommendations to the contracting officer specified above for resolution. If resolution cannot be made by the contracting officer, concerned parties may call the installation ombudsman, Dr. Julian Earls, at (216) 433-3014. Concerns and issues which cannot be resolved at the installation may be referred to the NASA ombudsman, Tom Luedtke, at (202) 358-2090. PLEASE DO NOT CONTACT THE OMBUDSMAN TO REQUEST COPIES OF THE SOLICITATION, VERIFY OFFER DUE DATE, CLARIFY TECHNICAL REQUIREMENTS, ETC. Requests of this nature should be made either to the contracting officer or as specified elsewhere in this document. THE NRA WILL BE ISSUED ON NOVEMBER 7, 1996, WITH A CLOSING DATE OF DECEMBER 24, 1996. (0296)

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