Investigation of Advanced Counterrotation Blade Configuration Concepts for High Speed Turboprop Systems. Task 3: Advanced Fan Section Grid Generator Final Report and Computer Program User's Manual

A procedure is studied for generating three-dimensional grids for advanced turbofan engine fan section geometries. The procedure constructs a discrete mesh about engine sections containing the fan stage, an arbitrary number of axisymmetric radial flow splitters, a booster stage, and a bifurcated core/bypass flow duct with guide vanes. The mesh is an h-type grid system, the points being distributed with a transfinite interpolation scheme with axial and radial spacing being user specified. Elliptic smoothing of the grid in the meridional plane is a post-process option. The grid generation scheme is consistent with aerodynamic analyses utilizing the average-passage equation system developed by Dr. John Adamczyk of NASA Lewis. This flow solution scheme requires a series of blade specific grids each having a common axisymmetric mesh, but varying in the circumferential direction according to the geometry of the specific blade row

Investigation of advanced counterrotation blade configuration concepts for high speed turboprop systems. Task 4: Advanced fan section aerodynamic analysis

The purpose of this study is the development of a three-dimensional Euler/Navier-Stokes flow analysis for fan section/engine geometries containing multiple blade rows and multiple spanwise flow splitters. An existing procedure developed by Dr. J. J. Adamczyk and associates and the NASA Lewis Research Center was modified to accept multiple spanwise splitter geometries and simulate engine core conditions. The procedure was also modified to allow coarse parallelization of the solution algorithm. This document is a final report outlining the development and techniques used in the procedure. The numerical solution is based upon a finite volume technique with a four stage Runge-Kutta time marching procedure. Numerical dissipation is used to gain solution stability but is reduced in viscous dominated flow regions. Local time stepping and implicit residual smoothing are used to increase the rate of convergence. Multiple blade row solutions are based upon the average-passage system of equations. The numerical solutions are performed on an H-type grid system, with meshes being generated by the system (TIGG3D) developed earlier under this contract. The grid generation scheme meets the average-passage requirement of maintaining a common axisymmetric mesh for each blade row grid. The analysis was run on several geometry configurations ranging from one to five blade rows and from one to four radial flow splitters. Pure internal flow solutions were obtained as well as solutions with flow about the cowl/nacelle and various engine core flow conditions. The efficiency of the solution procedure was shown to be the same as the original analysis

Carolene Products Redux: An Argument for Judicial Review of Legislation, Against the Future Prejudice of Discrete and Insular Minorities

Footnote four of US Supreme Court Justice Stone’s judgment in Carolene Products sets out a counter-majoritarian safeguard justification for judicial review of legislation. Jeremy Waldron’s so-called ‘core-case’ against judicial review of legislation is premised upon certain assumptions, without which Waldron himself concedes his arguments would not be sufficient. Waldron assumes that in liberal democracies most members of society and most of its officials are committed to the idea of individual and minority rights. He argues that it follows from this that the justification for judicial review set out in Carolene Products footnote four does not apply. This assumption underestimates the potential for future prejudice of discrete and insular minorities in liberal democratic states. Contra Waldron, I suggest that there is no contradiction in noting our capability of moral reasoning, which makes us worthy right-bearers, and our moral fallibility, which is the basis for judicial review of legislation. Evidence suggests we should be pessimistic about whether we can reliably fulfil our moral capability. If legislatures may not perform their functions in accordance with right reason, we should utilise constitutional rights and judicial review of legislation as a safeguard to minimise error

Sacrificing Liberty for Security: North Carolina\u27s Unconstitutional Search and Seizure of Arrestee DNA

This Comment examines the constitutionality of North Carolina’s DNA Database Act of 2010. The Act is a newly passed expansion of the existing state DNA database, and this Comment argues that North Carolina’s expansion authorizes a constitutionally impermissible, mandatory, suspicionless, and warrantless search and seizure of DNA and the information contained therein. With warrantless searches, the default rule is that they are “per se unreasonable under the Fourth Amendment— subject only to a few specifically established and well-delineated exceptions.” The Act should not survive Fourth Amendment scrutiny because it does not qualify as a well-delineated exception to the warrant requirement: it is not a search incident to a lawful arrest, it authorizes a search without probable cause or exigent circumstances, it is unjustifiable as a special needs search, and it does not survive basic balancing test scrutiny. Those directly impacted by the Act are arrestees for particular crimes. Although not convicted of the crime, their bodies are invaded, their DNA seized, and their personal, genetic information is given to the state and federal government for further search and analysis

Sacrificing Liberty for Security: North Carolina\u27s Unconstitutional Search and Seizure of Arrestee DNA

This Comment examines the constitutionality of North Carolina’s DNA Database Act of 2010. The Act is a newly passed expansion of the existing state DNA database, and this Comment argues that North Carolina’s expansion authorizes a constitutionally impermissible, mandatory, suspicionless, and warrantless search and seizure of DNA and the information contained therein. With warrantless searches, the default rule is that they are “per se unreasonable under the Fourth Amendment— subject only to a few specifically established and well-delineated exceptions.” The Act should not survive Fourth Amendment scrutiny because it does not qualify as a well-delineated exception to the warrant requirement: it is not a search incident to a lawful arrest, it authorizes a search without probable cause or exigent circumstances, it is unjustifiable as a special needs search, and it does not survive basic balancing test scrutiny. Those directly impacted by the Act are arrestees for particular crimes. Although not convicted of the crime, their bodies are invaded, their DNA seized, and their personal, genetic information is given to the state and federal government for further search and analysis

Streamflow Forecast of Bear River at Harer, Idaho

The primary objective of this thesis is to make an accurate stream flow forecast for the Bear River at Harer, Idaho in order to provide helpful information for the operation of the largest reservoir in the Bear River System and in guiding cropping programs in the watershed

An Investigation of the Effects of Group Listening Skills on the Frequency of Questions Asked by Students

No abstract was provided

Investigation of seismicity and related effects at NASA Ames-Dryden Flight Research Facility, Computer Center, Edwards, California

This report discusses a geological and seismological investigation of the NASA Ames-Dryden Flight Research Facility site at Edwards, California. Results are presented as seismic design criteria, with design values of the pertinent ground motion parameters, probability of recurrence, and recommended analogous time-history accelerograms with their corresponding spectra. The recommendations apply specifically to the Dryden site and should not be extrapolated to other sites with varying foundation and geologic conditions or different seismic environments