Relief valve

Relief valve to permit slow and fast bleeding rates at difference pressure level

Blade row dynamic digital compression program. Volume 2: J85 circumferential distortion redistribution model, effect of Stator characteristics, and stage characteristics sensitivity study

The results of dynamic digital blade row compressor model studies of a J85-13 engine are reported. The initial portion of the study was concerned with the calculation of the circumferential redistribution effects in the blade-free volumes forward and aft of the compression component. Although blade-free redistribution effects were estimated, no significant improvement over the parallel-compressor type solution in the prediction of total-pressure inlet distortion stability limit was obtained for the J85-13 engine. Further analysis was directed to identifying the rotor dynamic response to spatial circumferential distortions. Inclusion of the rotor dynamic response led to a considerable gain in the ability of the model to match the test data. The impact of variable stator loss on the prediction of the stability limit was evaluated. An assessment of measurement error on the derivation of the stage characteristics and predicted stability limit of the compressor was also performed

TF34 engine compression system computer study

The stability of the fan and the compressor components was examined individually using linearized and time dependent, one dimensional stability analysis techniques. The stability of the fan core integrated compression system was investigated using a two dimensional compression system model. The analytical equations on which this model was based satisfied the mass, axial momentum, radial momentum, and energy conservation equations for flow through a finite control volume. The results gave an accurate simulation of the flow through the compression system. The speed lines of the components were reproduced; the points of instability were accurately predicted; the locations where the instability was initiated in the fan and the core were indicated; and the variation of the bypass ratio during flow throttling was calculated. The validity of the analytical techniques was then established by comparing these results with test data and with results obtained from the steady state cycle deck

Blade row dynamic digital compressor program. Volume 1: J85 clean inlet flow and parallel compressor models

The results are presented of a one-dimensional dynamic digital blade row compressor model study of a J85-13 engine operating with uniform and with circumferentially distorted inlet flow. Details of the geometry and the derived blade row characteristics used to simulate the clean inlet performance are given. A stability criterion based upon the self developing unsteady internal flows near surge provided an accurate determination of the clean inlet surge line. The basic model was modified to include an arbitrary extent multi-sector parallel compressor configuration for investigating 180 deg 1/rev total pressure, total temperature, and combined total pressure and total temperature distortions. The combined distortions included opposed, coincident, and 90 deg overlapped patterns. The predicted losses in surge pressure ratio matched the measured data trends at all speeds and gave accurate predictions at high corrected speeds where the slope of the speed lines approached the vertical

You Say You Want an e-Revolution?: Helping our Patrons Benefit from Developments in Personal Technology

In this article, the author provides advice on how libraries and patrons can adapt to changes in technology and the prevalence of personal tech devices

How to Be Uncommon: Advice to Grads Seeking a First Professional Law Library Job from a Recent Survivor of the Process

In this article, the author provides advice on how to successfully apply for jobs in law libraries

Outlaws, Pirates, Judges: Judicial Activism as an Expression of Antiauthoritarianism in Anglo-American Culture

This article will argue that the rejection of what scholars otherwise view as controlling legal authority lies at the heart of judicial activism. Furthermore, it will argue that judicial activism itself channels the antiauthoritarian current in American culture (and in English culture predating its importation to America). Part II will examine the extensive scholarly writings already existing on judicial activism in order to identify common themes and to explore to what extent scholars have arrived at a consensus definition of judicial activism. Part III will then show that judicial activism may better be understood within the context of law as culture and will offer an updated definition of judicial activism that accounts for a cultural component. Part IV will then delve into expressions of antiauthoritarianism in broader, non-legal Anglo-American culture to demonstrate under what circumstances Anglo-American culture actively encourages antiauthoritarian behavior and attitudes. It will do so specifically through the lens of recurring cultural motifs of outlaws and pirates. Part V will then analyze four sets of judicially activist decisions to gauge the extent to which the decisions align with culturally appropriate exercises of antiauthoritarianism. The first set of decisions will consist of United States Supreme Court decisions that scholars commonly describe as activist. If judicial activism is indeed a cultural phenomenon, however, then one would expect it to be more commonplace than a handful of high profile and oft-discussed Supreme Court decisions cherry picked from throughout history. Therefore, the second and third sets of decisions will comprise United States Supreme Court cases from the 2017-2018 term and cases from courts other than the United States Supreme Court. The fourth set of decisions to be analyzed will be a selection of problem cases, which are activist cases that even apologists of judicial activism decry, and non-activist cases that nonetheless face criticism for their results. Ultimately, this article will argue that assessing judicial activism through the cultural prism of acceptable antiauthoritarianism provides a tool to differentiate between proper and improper judicial activism

The Lexis Two-Step: After Two Major Updates in 2014, Lexis Advance Empowers Users with Improved Functionality

In this article, the author discusses improvements to the Lexis Advance research platform