Performance improvements to the Naval Postgraduate School Turbopropulsion Labs Transonic Axially Splittered Rrotor
Lehrfeld, Michael C.
Gannon, Anthony J.
Hobson, Garth V.
MetadataShow full item record
Performance improvement investigations to the Naval Postgraduate School Turbo Propulsion Laboratorys (NPS TPL) Transonic Axially Splittered Rotor were investigated. Implementation of current NPS TPL design procedure that uses COTS software (MATLAB, SolidWorks, and ANSYS-CFX) for the geometric rendering and analysis was modified and documented. Numerical simulations were conducted and experimental data were collected at the NPS TPL utilizing the transonic compressor rig. This study advanced the understanding of casing tip gap, rotor-stator interaction, stator relative blade placement of a hybrid tandem/splittered design, and performance benefits. The reduction in rotor tip gap produced higher performance bench marks as predicted. The addition and analysis of multiple blade rows proved to be straight forward and the design methodology and in house procedure was further optimized. While other studies sought to affect the pressure surface of the lead blade, it was determined that using the trailing blade to influence the high momentum flow over suction surface of the lead blade produced better performance gains With tip gap closure and the addition of the stator stage, rotor alone performance was improved from experimentally measured peak total-to-total pressure ratio of 1.69 to 1.99 and the peak total-to-total isentropic efficiency from 72 to 77 percent at 100 percent design speed.
Approved for public release; distribution is unlimited.
Showing items related by title, author, creator and subject.
Nunn, Robert H.; Bloomer, James Wayne (Monterey, California. Naval Postgraduate School, 1981-01); NPS69-81-001BWhen a ball with a concentric hole through it is suspended within a spinning tubular projectile the ball will rotate in such a way that its hole is aligned with the axis of spin of the projectile. The ball thus serves as ...
Looney, John P. (Monterey, California. Naval Postgraduate School, 2010-09);Organizational research shows how mismatches between organizational design characteristics and contingency factors lead to lower performance. In addition to classic contingency factors, knowledge is a powerful resource ...
Agrawal, B.N. (2005);This paper presents a review of the spacecraft design program at the Naval Postgraduate School. This program is part of the space systems engineering curriculum. In this curriculum, the students take at least one course ...