NASA Lewis Research Center, 21000 Brookpark Road, Cleveland, Ohio 44135

A -- T55-L-712 ACTIVE COMPRESSOR STABILITY DEMONSTRATION POC Andrew M. Hubbard, Contracting Officer, (216) 433-2809, who may be contacted at Mail Stop 500-305, Albert K. Owen, Project Manager, (216) 433-5895, who may be contacted at Mail Stop 77-12. NASA Lewis Research Center is planning a procurement in the area of the T55-L-712 Engine Development. This proposed procurement is intended to focus on two separate test cell entries of the selected contractor's supplied T55-L-712 axial-centrifugal rig. The entries will be as follows: (1) a system identification experiment and (2) an active compressor control optimization/demonstration. The first test entry experiment is designed to quantify the response of the T55-L-712 compression system with a two dimensional boundary condition variations induced upstream in the compressor using eight air jet ejectors, having equal circumferential spacing. The second test entry experiment will optimize the design and operation of the active compressor stability enhancement system, which will be designed as a direct result of information obtained from the first entry test experiment. These air jet ejectors and the valves that will control the air are the same ejectors and valves that will be used to demonstrate active compressor stability enhancement on this rig/engine. The successful contractor shall have all compressor and rig hardware on-hand. The rig requires nearly thirty (30) pounds of air per second, run at almost 20,000 rpm and has a pressure ratio approaching 10:1. In addition, the successful contractor must be capable of providing the support and ancillary equipment and facilities required to perform these tests. The deliverable item will be a final report, which will describe all of the results of this technical effort. The etimated period of performance is twenty-four (24) months. The date set for receipt of proposals is approximate. All interested parties may submit information for evaluation of their R&D capabilities to the above Project Manager prior to the closing date of this synopsis. See Numbered Note(s): 25. (0124)

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