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Now showing items 71-78 of 78
Analysis, Fabrication and Testing of a MEMS-based Micropropulsion System
(Aerospace Computational Design Laboratory, Dept. of Aeronautics & Astronautics, Massachusetts Institute of Technology, 1999-06)
Various trends in the spacecraft industry are driving the development of low-thrust propulsion systems. These may be needed for fine attitude control, or to reduce the mass of the propulsion system through the use of small ...
Adaptive Mesh Euler Equation Computations of Vortex Breakdown in Delta Wing Flow
(Aerospace Computational Design Lab, Dept. of Aeronautics & Astronautics, Massachusetts Institute of Technology, 1993-01)
A solution method for the three-dimensional Euler equations is formulated and implemented.
The solver uses an unstructured mesh of tetrahedral cells and performs
adaptive refinement by mesh-point embedding to increase ...
Investigation of the F117A Vortical Flow Characteristics Preliminary Results
(Aerospace Computational Design Lab, Dept. of Aeronautics & Astronautics, Massachusetts Institute of Technology, 1992-10)
The investigation of the vortical flow around the F117A Stealth Fighter is presented in
order to demonstrate the capability to resolve leading edge vortices with an adaptive
finite element solver for the Euler equations. ...
A numerical analysis of 3-D inviscid stator/rotor interactions using non-reflecting boundary conditions
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1992], 1992)
This dissertation presents a method for the computation of three-dimensional inviscid, transonic steady and unsteady flows, primarily in axial flow turbines. The work is divided into two major contributions. The first is ...
Feedback stabilization of compression systems
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, 1993, 1993)
An experimental and analytical study was conducted on the use of feedback stabilization to extend the stable operating range of compression and pumping systems. Prevention of surge, in aircraft gas turbine engines, an ...
Active control of rotating stall in a three-stage axial compressor
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1993], 1993)
Stall inception in a three-stage axial compressor has been suppressed over a range of previously unstable operating points through the feedback of velocity perturbations to the inlet flow field. Perturbations were generated ...
A numerical investigation of a flutter in a transonic fan
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1996], 1996)
The mechanism of the bending mode flutter of a modern transonic fan has been studied using a quasi-3D viscous unsteady code. The type of flutter in the scope of this research is that for a highly loaded blade with a tip ...
Effects of inlet conditions on centrifugal diffuser performance
(Cambridge, Mass. : Gas Turbine Laboratory, Massachusetts Institute of Technology, [1997], 1997)
This report examines the influence of inlet flow conditions, including Mach number, flow angle, blockage, and axial flow non-uniformity, on the performance and operating range of a straight channel centrifugal compressor ...