Browsing Department of Aeronautics and Astronautics by Title
Now showing items 76-95 of 503
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Bayesian Nonparametric Adaptive Control using Gaussian Processes
(2013-03-15)Most current Model Reference Adaptive Control (MRAC) methods rely on parametric adaptive elements, in which the number of parameters of the adaptive element are fixed a priori, often through expert judgment. An example ... -
Blade passage flow structure effects on axial compressor rotating stall inception
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1996], 1996)A new computational approach has been developed to study the inception of rotating stall in axial compressors. Using this approach the flow structures within the compressor blade passages have been examined in order to ... -
Blade scale effects of tip leakage
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1990], 1990)The effects of blade-tip leakage in a turbine are investigated by modeling the stage as an incomplete actuator disk. It is found that the spanwise flow redistribution due to the gap is such as to produce a uniform unloading ... -
Blown flap noise
(Cambridge, Mass. : Massachusetts Institute of Technology, Flight Transportation Laboratory, [1972], 1972)This report is concerned with the noise generated by blown flaps of the type currently being developed for the short take off and landing aircraft. The majority of the report is an experimental study of the sound-radiation ... -
Boredom and Distraction in Multiple Unmanned Vehicle Supervisory Control
(Interacting with Computers, 2013)Operators currently controlling Unmanned Aerial Vehicles report significant boredom, and such systems will likely become more automated in the future. Similar problems are found in process control, commercial aviation, and ... -
Boundary layer effects on airfoil lift
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1958], 1958)A study of the discrepancy in lift between potential flow calculations and experiments was made. In potential flow the fluid is assumed to follow the contour of the airfoil, forming a stagnation point at the geometric ... -
Boundary layer on an airfoil in a cascade
([Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1958], 1958)A study of the turbulent boundary layer on an airfoil in a cascade is presented. The major portion of the observations are on the suction surface of the airfoil. The effect of added diffusion across the cascade due to a ... -
Boundary layer separation ; preliminary report
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1962], 1962)The phenomenon of incompressible boundary layer separation and the existing methods of predicting it are discussed. The failure of these theories in many cases clearly indicates a need for further investigation. A program ... -
Boundary layer separation in internal flow
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1965], 1965)An investigation of incompressible turbulent boundary layer separation in internal flow is presented with experimental results for a variable geometry, two-dimensional diffuser and two conical diffusers. A simple analytical ... -
Brainstem processing of vestibular sensory exafference: implications for motion sickness etiology
(Springer, 2014-04-20)The origin of the internal “sensory conflict” stimulus causing motion sickness has been debated for more than four decades. Recent studies show a subclass of neurons in the vestibular nuclei and deep cerebellar nuclei ... -
Calculation of a self-consistent, low frequency electrostatic field in the drift-kinetic approximation
(Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine and Plasma Dynamics Laboratory, [1977], 1977)We derive an asymptotic series in [omega]p -2 , the inverse-square plasma frequency, for the self-consistent, low frequency electrostatic field in tori. The derivation is consistent with the drift-kinetic ordering and may ... -
Can airline deregulation work in international air transportation?
(Cambridge, Mass. : Massachusetts Institute of Technology, Flight Transportation Laboratory, 1980, 1980)"I AM PLEASED TO BE ABLE TO JOIN YOU TODAY TO TALK ABOUT THE DEVELOPMENT OF A MORE COMPETITIVE INTERNATIONAL AIR TRANSPORT SYSTEM -- A TOPIC THAT HAS GENERATED SUBSTANTIAL DEBATE WORLDWIDE OVER THE LAST SEVERAL YEARS- IN ... -
Cascade performance with accelerated or decelerated axial velocity
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1959], 1959)A theoretical method to estimate the effect of axial velocity change through a cascade was investigated. The change of axial velocity was reproduced by distributing sinks and sources within the blade passages, and the ... -
A cascade tunnel for investigation of rotating stall
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1954], 1954)A test apparatus which will reproduce the rotating stall phenomenon found in axial compressors has been constructed and installed in the main wind tunnel circuit of the Gas Turbine Laboratory. The test section consists of ... -
Cell fleet planning : an industry case study
(Cambridge, Mass. : Massachusetts Institute of Technology, Flight Transportation Laboratory, [1984], 1984)The objective of this thesis is to demonstrate the practical use of the Cell Fleet Planning Model in planning the fleet for the U.S. airline industry. The Cell Model is a cell theory, linear programming approach to fleet ... -
Centrifugal effect on the boundary layer on a blade of an axial turbo-machine
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1962], 1962)A study of the effect of centrifugal force acting on the turbulent boundary layer of a blade in a turbo-machine is presented. The study includes experimental work conducted in an apparatus featuring an annular cascade of ... -
Changes in air transport policy : the problem of regulating a market in transition
(Cambridge, Mass. : Massachusetts Institute of Technology, Flight Transportation Laboratory, 1981, 1981) -
Channel flow modeling of impingement cooling of a rotating turbine blade
(Cambridge, Mass. : Gas Turbine & Plasma Dynamics Laboratory, Massachusetts Institute of Technology, [1984], 1984)Local heat transfer distributions in impingement cooling have been measured by Kreatsoulas [1] and Preiser [2] for a range of conditions which model those in actual turbine blades, including the effects of rotation. These ... -
Characterization of a semidiurnal eastward-propagating tide at high northern latitudes with Mars Global Surveyor electron density profiles
(American Geophysical Union, 2007-08-03)Apparent phase velocities of zonal structure, estimated from Mars Global Surveyor (MGS) electron density profiles, are used to identify and characterize SE1, the semidiurnal eastward-propagating tide with zonal wave number ... -
The choice of V/STOL transportation for the Northeast Corridor
(Cambridge, Mass. : Massachusetts Institute of Technology, Flight Transportation Laboratory, [1972], 1972)Aircraft type, aircraft size, number of terminals, and degree of nonstop routing for a V/STOL transportation system in the Northeast Corridor are chosen by exploring a wide range of combinations. Helicopter and STOL aircraft ...
