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Development and assessment of a soot emissions model for aircraft gas turbine engines
(Massachusetts Institute of Technology, 2008)
Assessing candidate policies designed to address the impact of aviation on the environment requires a simplified method to estimate pollutant emissions for current and future aircraft gas turbine engines under different ...
Entry, descent and landing vehicle design space exploration for crewed Mars missions
(Massachusetts Institute of Technology, 2008)
With the announcement of the Vision for Space Exploration in 2004, NASA has been preparing plans for a crewed mission to Mars in the next few decades. One challenge associated with crewed missions to the Martian surface ...
A methodology for centrifugal compressor stability prediction
(Massachusetts Institute of Technology, 2009)
The stable operation of centrifugal compressors is limited by well-known phenomena, rotating stall and surge. Although the manifestation of the full scale instabilities is similar to the ones observed in axial machines, ...
Assessing low-fare entry in airline markets : impacts of revenue management and network flows
(Massachusetts Institute of Technology, 2004)
(cont.) the essential factors affecting traditional measures of airline performance following low-fare entry. Our simulation results show that these measures are greatly affected by the entrant's capacity relative to the ...
A collagen-GAG matrix for the growth of intervertebral disc tissue
(Massachusetts Institute of Technology, 2002)
Intervertebral disc (IVD) degeneration and herniation is a significant problem, more so in the aviation field. The IVD also changes during spaceflight. Current treatments for IVD problems can have unfavorable long-term ...
Advanced propulsion for microsatellites
(Massachusetts Institute of Technology, 2000)
Microsatellites have become increasingly popular in recent years as they offer significant cost savings, higher reliability, and are generally more affordable for a large variety of commercial applications. Since many ...
Integral twist actuation of helicolpter rotor blades for vibration reduction
(Massachusetts Institute of Technology, 2001)
Active integral twist control for vibration reduction of helicopter rotors during forward flight is investigated. The twist deformation is obtained using embedded anisotropic piezocomposite actuators. An analytical framework ...
Aerodynamic performance measurements of a film-cooled turbine stage
(Massachusetts Institute of Technology, 2001)
The goal of this research is to measure the aerodynamic performance of a film-cooled turbine stage and to quantify the loss caused by film-cooling. A secondary goal of the research is to provide a detailed breakdown of the ...
Applications of axial and radial compressor dynamic system modeling
(Massachusetts Institute of Technology, 2001)
The presented work is a compilation of four different projects related to axial and centrifugal compression systems. The projects are related by the underlying dynamic system modeling approach that is common in all of them. ...
Macro-scale investigation of high speed gas bearings for MEMS devices
(Massachusetts Institute of Technology, 2000)
A macro-scale experimental test facility for investigating high-speed gas bearings for MEMS devices such as the MIT Micro-Engine is presented along with results from subsequent experiments. It is shown that the bearings ...