October 2000 Newsletter - Naval Postgraduate School

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LAB NOTES REFURBISHED ROTOR SPIN FACILITY IN NPS’ TURBO-PROPULSION LABORATORY REACHES SECOND MILESTONE When ‘High Cycle Fatigue (HCF)’ became recognized as the most troubling issue associated with military aircraft engine reliability and durability, a National initiative began with the 1 st and 2 nd National Turbine Engine HCF Conferences held at the Naval Postgraduate School. During the 2 nd Conference in 1997, the Navy proposed to contribute its ‘Rotor Spin Facility’ at Patuxent River, MD to conduct HCF-related structural tests, and to refurbish the engine-scale spin pit facility at the Turbopropulsion Laboratory (TPL) at NPS, to serve as the Navy’s Rotor-Spin Research Facility. The goal of the NPS program was to develop, or evaluate, blade excitation and measurement techniques for HCF testing in vacuum spin pits, and to transition those techniques to the Rotor Spin Facility in Maryland. Above: Rotor-Spin Research Facility in the Turbo-Propulsion Laboratory. Right: Aluminum Test Rotor. The first milestone was reached when the refurbished facility was reported (and toured) at the 4 th National Conference again held at NPS in 1999. The second major milestone was reached this July, when blade resonance was excited in an eleven-inch aluminum fan rotor using both air-jet and eddycurrent excitation (ECE) techniques. The measurement of the resonance was via strain gauges, using a very high speed slip ring assembly and real-time data acquisition. This success was reported at the Passive Damping Action Team Meeting held at Duke University. The research team from the Department of Aeronautics and Astronautics involves Professor Ray Shreeve and Associate Professor Garth Hobson, with Doug Seivwright as the research project engineer. John Gibson (Rolands and Associates) is the assigned technician, and Rick Still is the support manager. Hood Technology Corporation are contracted by the Air Force to develop ECE, and an excellent working relationship has been developed between NPS and Hood. In the future, the program will involve further experiments using the aluminum rotor, and then a small titanium rotor. This will be followed by ECE excitation of a nickel turbine rotor with experimental vibration dampers. This will be followed by the excitation of a 37-inch diameter fan from the Pratt & Whitney F119 engine (F22), and then a durability evaluation of a damaged JSF fan rotor. NPS Research page 30 October 2000
LAB NOTES NEW ACQUISITIONS FOR THE RADAR AND ELECTRONIC WARFARE LABORATORY SUPPORT FACULTY AND STUDENT RESEARCH The joint efforts of Professor Jeffrey Knorr, Chair, Department of Electrical and Computer Engineering (http://web.nps.navy.mil/~ece/) Research Associate Bob Bluth, Director of the Center for Interdisciplinary Remotely Piloted Aircraft Studies (http://web.nps.navy.mil/ ~cirpas/) and Paul Buczynski, Staff Director, Radar and Electronic Warfare Laboratory, have led to the acquisition of two new pieces of equipment to support faculty and student research. The AN/MPQ-64 Sentinal radar is a modern mobile, phased array, pulse doppler radar that will be modified so it can be used as an instrument for severe storm research. Funding from the National Science Foundation is expected to support the modification and deployment of the radar. The AN/TPQ- 37 Firefinder radar is a modern mobile, phased array, pulse doppler radar and will be modified so it can be used as an instrument for meteorological research. Funding from the Office of Naval Research is anticipated to support development of at sea capabilities for the Fleet. The AN/TPQ-37 Firefinder Radar. The AN/MPQ-64 Sentinel Radar. NPS Research page 31 October 2000
Page 1 and 2: NAVAL POSTGRADUATE SCHOOL RESEARCH
Page 3 and 4: MISSILE DEFENSE RESEARCH, continued
Page 5 and 6: MISSILE DEFENSE RESEARCH, continued
Page 7 and 8: FEATURED PROJECT JP-10/AEROSOL FOR
Page 9 and 10: FEATURED PROJECT MICRO-AIR VEHICLE
Page 11 and 12: RESEARCH AND EDUCATION WEAPONEERING
Page 15 and 16: RESEARCH CENTER RAD-HARD SEMICONDUC
Page 17 and 18: Professor Alan Ross, the Navy TENCA
Page 19 and 20: PROJECT NOTES SYSTEMATIC APPROACH T
Page 21 and 22: PROJECT NOTES SABBATICAL BRINGS PRO
Page 23 and 24: STUDENT RESEARCH INTELLIGENT AGENTS
Page 25 and 26: MOVES GRADUATES ITS LARGEST CLASS T
Page 27 and 28: ENGINEERING ACOUSTICS CHAIR ESTABLI
Page 29: TECHNOLOGY TRANSFER NPS PARTNERSHIP
Page 33 and 34: AERONAUTICS AND ASTRONAUTICS Von T.
Page 35 and 36: --continued from page 34 Programmab
Page 37 and 38: --continued from page 36 PHYSICS X.
Page 39 and 40: RESEARCH OVERVIEW MISSILE DEFENSE R
Page 41 and 42: FEATURED PROJECT JP-10/AEROSOL FOR
Page 43 and 44: MICRO-AIR VEHICLE AERODYNAMICS, con
Page 45 and 46: FEATURED PROJECT MICRO-AIR VEHICLE
Page 49 and 50: RESEARCH CENTER RAD-HARD SEMICONDUC
Page 51 and 52: CONFERENCE CALENDAR CONFERENCES/MEE

October 2000 Newsletter - Naval Postgraduate School

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