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Measurements of rotor stalling in a matched and a mismatched multistage compressor
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1995], 1995)
This paper presents the results from a set of experiments on stall inception in multistage axial flow compressors. The experiments were tailored to investigate phenomena having a wide range of time and length scales. This ...
A computational model for rotating stall and inlet distortions in multistage compressors
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1999], 1999)
This thesis presents the conceptualization and development of a computational model for describing three-dimensional non-linear disturbances associated with instability and inlet distortion in multistage compressors. ...
UNSFLO : a numerical method for the calculation of unsteady flow in turbomachinery
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1991], 1991)
Introduction: There are four principal sources of unsteadiness in a single stage of a turbomachine in which there is one row of stationary blades (stators) and one row of moving blades (rotors). As shown in Fig. 1.1, ...
Aerodynamics of aircraft engines : stride and stumbles
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, 1992, 1992)
Summary: Attempts to understand and predict the aerodynamic behaviour of compressors and turbines in aircraft gas turbines have been encouraged by the intense competitive pressure which exists. Many of the apparently most ...
Control of the unsteady flow in a stator blade row interacting with upstream moving wakes
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1993], 1993)
A computational study of the unsteady flow in a 2-D stator blade row interacting with upstream rotor wakes has been carried out. A direct spectral-element Navier-Stokes solver has been used for the laminar flow regime ...
Active control of rotating stall in axial compressors
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1992], 1992)
An active control system has been implemented on a low-speed single-stage axial compressor. This control system stabilizes the perturbations which normally lead to rotating stall, thus extending the range of operation of ...
Role of flow alignment and inlet blockage on vaned diffuser performance
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, 1997, 1997)
A computational investigation of the effects of inlet conditions on straight-channel diffuser performance is undertaken. The steady, three-dimensional, Navier-Stokes solver used for the investigation is found to adequately ...
Airline overbooking performance measurement
([Cambridge, MA : Dept. of Aeronautics & Astronautics], Flight Transportation Laboratory, [1995], 1995)
Since the "product" of an airline cannot be stored, the value of every seat which is left empty upon departure is lost forever or "spoiled". In order to compensate for the economic effects of passengers holding a confirmed ...
Competitive behavior of airlines at multiple airport systems
([Cambridge, Mass.] : Flight Transportation Laboratory, [1995], 1995)
The way passenger traffic is distributed at multiple airport systems continues to intrigue air transportation planners, urban planners, and policy-makers as researchers attempt to unravel how airlines, air travelers and ...
The sell up potential of airline demand
(Cambridge, Mass. : Massachusetts Institute of Technology, Dept. of Aeronautics & Astronautics, Flight Transportation Laboratory, [1990], 1990)
Differential pricing of air transportation plays an important role in the current theories of airline seat inventory management. The ability to recognize those passengers willing to "sell up". or pay more for a seat on a ...