Browsing Gas Turbine Laboratory by Title
Now showing items 77-96 of 123
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On the theory of shear flow
(Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine Laboratory, ©1966, ©1966)In this report are collected together some introductory notes on the theory of the three-dimensional, steady flow of an inviscid fluid. The equations of motion are discussed and transformed and expressions for the streamwise ... -
Optimal mistuning for enhanced aeroelastic stability of transonic fans
([Washington, D.C.? : National Aeronautics and Space Administration, 1983], 1983)An inverse design procedure was developed for the design of a mistuned rotor. The design requirements are that the stability margin of the eigenvalues of the aeroelastic system be greater than or equal to some minimum ... -
Parametric dependencies of aeroengine flutter for flutter clearance applications
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [2000], 2000)This thesis describes the effects of operational parameters upon aeroengine flutter stability. The study is composed of three parts: theoretical development of relevant parameters, exploration of a computational model, and ... -
The prediction of inter-electrode breakdown in magnetohydrodynamic generators
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1974], 1974)Introduction: In this paper, a method of calculation of inter-electrode electrical breakdown phenomena in magnetohydrodynamic generators is presented. Interelectrode breakdown is observed to occur in experimental MHD ... -
Prediction of three-dimensional compressible turbulent boundary layers on transonic compressor blades
(c1980, c1980)A small crossflow approximation to the full three dimensional compressible turbulent boundary layer equations for turbomachine blade rows is developed by taking advantage of the nature of blade geometry and inviscid flow ... -
Quantitative investigation of inlet vortex flow field
(Cambridge, Mass. : Gas Turbine & Plasma Dynamics Laboratory, Massachusetts Institute of Technology, [1984], 1984)A quantitative investigation of the flow field of an inlet in cross-wind has been carried out for various operating conditions, including flow regimes representative of aircraft engine inlets at take-off. The measurements ... -
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 ... -
Rotor wake behavior in a transonic compressor stage and its effect on the loading and performance of the stator
(Cambridge, Mass. : Gas Turbine & Plasma Dynamics Laboratory, Massachusetts Institute of Technology, [1980], 1980)The structure and behavior of wakes from a transonic compressor rotor and their effects on the loading and performance of the downstream stator have been studied experimentally. The rotor is 2 feet in diameter with a tip ... -
Rotor wake transport in turbomachine stators
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1971], 1971)The mechanism of rotor wake interaction with stators has been examined experimentally by using helium, injected into the rotor wakes, as a tracer for the wake fluid. Time averaged helium Drofiles downstream of the stator, ... -
Secondary flow and losses in a compressor cascade
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1958], 1958)Three ways in which secondary flow can be generated in a straight compressor cascade have been investigated. 1. Wakeflow. The inlet flow is characterized by a constant inlet angle and a varying stagnation pressure over the ... -
A secondary flow approach to the inlet vortex flow field
(c1980, c1980)A theoretical study is presented of the fluid mechanics of the inlet vortex (or ground vortex). The vorticity field associated with this phenomenon is investigated using a secondary flow approach. In this approach the flow ... -
Separation of turbulent, incompressible flow from a curved, backward-facing step
(Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine Laboratory, [1966], 1966)An experimental investigation of turbulent, incompressible flow separation over curved and sharp, backward-facing steps is presented with results for various step heights. Mean velocities in the separating boundary layer ... -
Separation of turbulent, incompressible flow from a curved, backward-facing step
(Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine Laboratory, [1966], 1966)An experimental investigation of turbulent, incompressible flow separation over curved and sharp, backward-facing steps is presented with results for various step heights. Mean velocities in the separating boundary layer ... -
Skewed turbulent boundary layers
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1959], 1959)The problem of predicting the growth of incompressible, skewed, turbulent boundary layers on smooth surfaces is considered. It is supposed that sufficient initial information and a complete knowledge of the external pressure ... -
Small disturbances in compressor annuli with swirl, throughflow and entropy variation
(Cambridge, Mass. : Gas Turbine Laboratory , Massachusetts Institute of Technology, [1970], 1970)Introduction: Control of the radiation of sound from the compressors and turbines of jet engines depends to a great extent on understanding of the propagation of acoustical modes in the ducting, the general design approach ... -
Some observations of the vibrations of slender rotating shafts
(Cambridge, Mass. : Gas Turbine & Plasma Dynamics Laboratory, Massachusetts Institute of Technology, [1982], 1982)The linear theory of a slender, initially bowed, rotating shaft is reviewed for both free and forced vibrations, and found to compare well with a simple experiment on such a shaft. The shaft behavior passing through the ... -
Sound generation from a transonic compressor stage
(Cambridge, Mass. : Gas Turbine & Plasma Dynamics Laboratory, Massachusetts Institute of Technology, [1981], 1981)Some aspects of the sound pressure wave characteristics produced by a transonic compressor stage are studied by the use of a simplified mathematical model involving flow parallel to a moving corrugated board. The critical ... -
Spherical pressure probe for retrieving freestream pressure and directional data
(Cambridge, Mass. : Massachusetts Institute of Technology, Gas Turbine & Plasma Dynamics Laboratory, [1977], 1977)A spherical pressure probe designed to time resolve the total and static pressure and freestream radial and rotational flow angles in turbomachine flow fields was found to produce accurate results for flow angles over a ... -
Stall propagation in a cascade of airfoils
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1956], 1956)An experimental investigation of stall propagation in a stationary circular cascade by means of high speed schlieren and interferometer photography is described. This investigation suggests an analytical approach to the ... -
Stall propagation in axial compressors
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1955], 1955)A theory of stall propagation in a cascade of airfoils of high solidity has been developed which includes the effects of finite blade chord and of the boundary layer response to changes in angle of attack. The theory is ...
