Re´sume´ of Transonic-Compressor Research at NACA Lewis Laboratory

1961 ◽  
Vol 83 (3) ◽  
pp. 219-232 ◽  
Author(s):  
Seymour Lieblein ◽  
Irving A. Johnsen
Keyword(s):  
High Performance ◽  
Focal Point ◽  
Research Effort ◽  
Axial Flow ◽  
Intensive Research ◽  
Transonic Compressor ◽  
The Past ◽  
Analytical Studies ◽  
Extensive Bibliography ◽  
Axial Flow Compressors

During the past decade, the Lewis Laboratory of the NACA was engaged in intensive research on the aerodynamics of high-performance axial-flow compressors. The focal point of this program, the development of the transonic compressor, is briefly reviewed, and the basic significance of the results is discussed. Following this, a re´sume´ of succeeding experimental single and multistage investigations and analytical studies is given to indicate the scope of the work and the major results achieved. An extensive bibliography covering the research effort during this time is included.

A Proposal for Passive Wall Treatment Applied in High Performance Axial Flow Compressors

2021 ◽  
Author(s):  
Ruben Bruno Diaz ◽  
Jesuino Takachi Tomita ◽  
Cleverson Bringhenti ◽  
Luiz Henrique Lindquist Whitacker ◽  
Francisco Carlos Elizio De Paula
Keyword(s):  
High Performance ◽  
Axial Flow ◽  
Axial Flow Compressors

scholarly journals Design of Compressor Blades Suitable for Transonic Axial-Flow Compressors

1967 ◽  
Author(s):  
M. P. Boyce
Keyword(s):  
Digital Computer ◽  
Design Method ◽  
Axial Flow ◽  
Flow Chart ◽  
Blade Profile ◽  
Compressor Blades ◽  
Transonic Compressor ◽  
Maximum Thickness ◽  
Mach Numbers ◽  
Axial Flow Compressors

This paper deals with the development of a blade profile suitable for transonic axial-flow compressors. Development of new incidence and deviation rules incorporating thickness, Mach numbers, and position of maximum thickness corrections are fully explained. In addition, a step-by-step analysis for the calculation of the blade profile for a transonic compressor is presented. The design method outlined is easily adaptable for the digital computer. A flow chart of the procedure to facilitate programming has also been included.

The J83 Seven-Stage Transonic Compressor

1961 ◽  
Vol 83 (3) ◽  
pp. 291-301 ◽  
Author(s):  
J. A. King
Keyword(s):  
High Performance ◽  
Axial Flow ◽  
Axial Flow Compressor ◽  
Transonic Compressor ◽  
Turbojet Engine ◽  
Flow Compressor ◽  
Maximum Thrust

The J83 turbojet engine was a high-performance, lightweight engine with a maximum thrust of 2450 lb, a diameter of 18 in., and a weight of approximately 300 lb. The compressor for this engine was a seven-stage, transonic, axial-flow compressor with an inlet tip diameter of 15.2 in. and a hub-lip ratio of 0.433. Details of the aero-thermodynamic design of this compressor and the problems encountered during its development are given in this paper.

Performance Management Transformation

2020 ◽  
Keyword(s):  
Organizational Performance ◽  
Performance Management ◽  
High Performance ◽  
Best Practice ◽  
Call To Action ◽  
Daily Work ◽  
The Past ◽  
Great Debate ◽  
The Subject ◽  
New Research

No other talent process has been the subject of such great debate and emotion as performance management (PM). For decades, different strategies have been tried to improve PM processes, yielding an endless cycle of reform to capture the next “flavor-of-the-day” PM trend. The past 5 years, however, have brought novel thinking that is different from past trends. Companies are reducing their formal processes, driving performance-based cultures, and embedding effective PM behavior into daily work rather than relying on annual reviews to drive these. Through case studies provided from leading organizations, this book illustrates the range of PM processes that companies are using today. These show a shift away from adopting someone else’s best practice; instead, companies are designing bespoke PM processes that fit their specific strategy, climate, and needs. Leading PM thought leaders offer their views about the state of PM today, what we have learned and where we need to focus future efforts, including provocative new research that shows what matters most in driving high performance. This book is a call to action for talent management professionals to go beyond traditional best practice and provide thought leadership in designing PM processes and systems that will enhance both individual and organizational performance.

Fused Ambipolar Aza-isoindigos with NIR absorption

2021 ◽  
Author(s):  
Liping Yao ◽  
Danlei Zhu ◽  
Hailiang Liao ◽  
Sheik Haseena ◽  
Mahesh kumar Ravva ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Low Cost ◽  
Light Weight ◽  
The Past ◽  
Pi Conjugated ◽  
Nir Absorption ◽  
Conjugated Organic Semiconductors

Due to their advantages of low-cost, light-weight, and mechanical flexibility, much attention has been focused on pi-conjugated organic semiconductors. In the past decade, although many materials with high performance has...

scholarly journals Analgesia for Sheep in Commercial Production: Where to Next?

Animals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1127
Author(s):  
Alison Small ◽  
Andrew David Fisher ◽  
Caroline Lee ◽  
Ian Colditz
Keyword(s):  
Research Effort ◽  
Mitigation Strategies ◽  
Worth Living ◽  
Life Worth Living ◽  
The Past ◽  
Considerable Research ◽  
Husbandry Practices ◽  
Industry Practice ◽  
Successful Launch ◽  
Inflammatory Drugs

Increasing societal and customer pressure to provide animals with ‘a life worth living’ continues to apply pressure on livestock production industries to alleviate pain associated with husbandry practices, injury and illness. Over the past 15–20 years, there has been considerable research effort to understand and develop mitigation strategies for painful husbandry procedures in sheep, leading to the successful launch of analgesic approaches specific to sheep in a number of countries. However, even with multi-modal approaches to analgesia, using both local anaesthetic and non-steroidal anti-inflammatory drugs (NSAID), pain is not obliterated, and the challenge of pain mitigation and phasing out of painful husbandry practices remains. It is timely to review and reflect on progress to date in order to strategically focus on the most important challenges, and the avenues which offer the greatest potential to be incorporated into industry practice in a process of continuous improvement. A structured, systematic literature search was carried out, incorporating peer-reviewed scientific literature in the period 2000–2019. An enormous volume of research is underway, testament to the fact that we have not solved the pain and analgesia challenge for any species, including our own. This review has highlighted a number of potential areas for further research.

scholarly journals Analysis of the Mycosporine-Like Amino Acid (MAA) Pattern of the Salt Marsh Red Alga Bostrychia scorpioides

Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 321
Author(s):  
Maria Orfanoudaki ◽  
Anja Hartmann ◽  
Julia Mayr ◽  
Félix L. Figueroa ◽  
Julia Vega ◽  
...  
Keyword(s):  
Amino Acids ◽  
High Performance Liquid Chromatography ◽  
High Performance ◽  
Red Alga ◽  
Array Detector ◽  
Diode Array ◽  
Diode Array Detector ◽  
The Past ◽  
Specific Species

This study presents the validation of a high-performance liquid chromatography diode array detector (HPLC-DAD) method for the determination of different mycosporine-like amino acids (MAAs) in the red alga Bostrychia scorpioides. The investigated MAAs, named bostrychines, have only been found in this specific species so far. The developed HPLC-DAD method was successfully applied for the quantification of the major MAAs in Bostrychia scorpioides extracts, collected from four different countries in Europe showing only minor differences between the investigated samples. In the past, several Bostrychia spp. have been reported to include cryptic species, and in some cases such as B. calliptera, B. simpliciuscula, and B. moritziana, the polyphyly was supported by differences in their MAA composition. The uniformity in the MAA composition of the investigated B. scorpioides samples is in agreement with the reported monophyly of this Bostrychia sp.

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