Development of New High AN2 Last LP Stage Turbine and Exhaust Systems: A Cost Effective Solution for the 21st Century

2006 ◽  
Author(s):  
Brian Haller
Keyword(s):  
21St Century ◽  
High Performance ◽  
Coupled System ◽  
Cost Effective ◽  
The Novel ◽  
Engine Design ◽  
Air Turbine ◽  
Optimum Aerodynamic ◽  
Manufacturing Technologies ◽  
Exhaust Systems

A new high AN2 last LP stage turbine has been developed to provide leading performance for turbomachines in the 21st Century. It required a multi-disciplinary design approach involving aerodynamics, materials, mechanics (stress and vibration) and manufacturing technologies. The objective of the design was to achieve around 5% gain in last stage total-to-static efficiency, relative to the current competitive datum, for a very compact machine with few parts count ie reduced cost. It is shown how the optimum aerodynamic design was achieved for the stage. The paper presents details of the novel approaches used for the design including preliminary optimization, blading design and results from multistage 3D viscous predictions. The new stage has been tested in a Warm Air Turbine test rig at full scale engine representative conditions. The “loop was closed” by comparing the detailed test measurements with throughflow and 3D viscous analyses. This gives high confidence in the new approaches used. Additionally, the development of new compact high performance axial-radial and axial exhaust systems, which were designed to operate downstream of the new last LP stage, are described. To achieve the optimum performance, the last LP stage has to designed as a coupled system with the exhaust diffusers. The new LP technologies have already been scaled and cloned to a new engine design and sold by the Company.

scholarly journals An Automated and High-Throughput Immunoaffinity Magnetic Bead-Based Sample Clean-Up Platform for the Determination of Aflatoxins in Grains and Oils Using UPLC-FLD

Toxins ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 583 ◽  
Author(s):  
Zhihong Xuan ◽  
Jin Ye ◽  
Bing Zhang ◽  
Li Li ◽  
Yu Wu ◽  
...  
Keyword(s):  
High Throughput ◽  
High Performance ◽  
Cost Effective ◽  
Magnetic Bead ◽  
The Novel ◽  
Analysis Method ◽  
Automated Method ◽  
Accuracy And Precision ◽  
Optimized Conditions

Sample clean-up remains the most time-consuming and error-prone step in the whole analytical procedure for aflatoxins (AFTs) analysis. Herein, an automated and high-throughput sample clean-up platform was developed with a disposable, cost-effective immunoaffinity magnetic bead-based kit. Under optimized conditions, the automated method takes less than 30 min to simultaneously purify 20 samples without requiring any centrifugation or filtering steps. When coupled to ultra-high performance liquid chromatography with fluorescence detection, this new analysis method displays excellent accuracy and precision as well as outstanding efficiency. Furthermore, an interlaboratory study was performed in six laboratories to validate the novel protocol. Mean recovery, repeatability, reproducibility, and Horwitz ratio values were within 91.9%–107.4%, 2.5%–7.4%, 2.7%–10.6%, and 0.26%–0.90, respectively. Results demonstrate that the developed sample clean-up platform is a reliable alternative to most widely adopted clean-up procedures for AFTs in cereals and oils.

Chromatographic estimation of a novel triple-therapy combination targeting Helicobacter pylori eradication in different matrices

Bioanalysis ◽  
2021 ◽  
Vol 13 (20) ◽  
pp. 1547-1557
Author(s):  
Eman Darweish ◽  
Maya S Eissa ◽  
Yasmin M Fayez ◽  
Hoda M Marzouk
Keyword(s):  
Helicobacter Pylori ◽  
Triple Therapy ◽  
High Performance ◽  
Cost Effective ◽  
Gradient Elution ◽  
Array Detector ◽  
The Novel ◽  
Helicobacter Pylori Eradication ◽  
Serious Infections

Aim: Helicobacter pylori infection is a prevalent global bacterial infection that can potentially exaggerate symptoms of other serious infections like SARS-CoV-2 (COVID-19). Methodology: Herein, an efficient, accurate and cost-effective high-performance liquid chromatography-diode array detector method was developed and validated for determination of the novel triple therapy combination of tinidazole (TD), clarithromycin (CLR) and lansoprazole (LAN) in different analytical matrices (pharmaceutical formulation, dissolution media and spiked human plasma). Results: Successful chromatographic separation was achieved using Agilent Microsorb-MV 100–5 CN column (250 × 4.6 mm, 5 μm) and a mobile phase consisted of acetonitrile and 10.0 mM phosphate buffer, pH 7.5 ± 0.1 at flow rate of 1 ml/min via gradient elution. UV-detection was accomplished at 210.0 nm for CLR and 290.0 nm for TD and LAN. Conclusion: The developed method clearly provides a reliable, beneficial and cost-effective tool for quality control, dissolution testing and biological applications of the mentioned drugs.

High Performance and Cost Effective Recuperator for Micro-Gas Turbines

2002 ◽  
Author(s):  
Gunnar Lagerstro¨m ◽  
Max Xie
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
High Performance ◽  
Electrical Power ◽  
Cost Effective ◽  
Piping System ◽  
Micro Gas Turbine ◽  
Air Inlet ◽  
Manufacturing Technologies ◽  
Air Cells

Rekuperator Svenska AB owned by VOLVO Technology Transfer Corporation and Avesta Polarit, has successfully developed a completely laser welded recuperator for micro-gas turbine applications. Tests have shown that the thermal performance is very competitive. The recuperator was installed in a 100 kW(e) micro-gas turbine power plant for combined electricity and heat generation by a customer. The recuperator is a primary surface counter flow heat exchanger with cross corrugated duct configuration. The primary heat transfer surface plate patterns are stamped and a pair of the plates are laser welded to form an air cell. The air cells are then stacked and laser welded together to form the recuperator core which is tied between two end beams. Manifolds for air inlet and outlet as well as piping system are welded to the core. Through varying the number of air cells the recuperator core can easily be adapted for micro-gas turbine applications with different output rates of electrical power. The key manufacturing technologies are stamping of the air cell plates and laser welding of the air cells. These processes can be fully automated for mass production at low costs.

Cost effective and high-performance thin film Si solar cell towards the 21st century

2001 ◽  
Vol 66 (1-4) ◽  
pp. 117-125 ◽  
Author(s):  
Kenji Yamamoto ◽  
Masashi Yoshimi ◽  
Yuko Tawada ◽  
Yoshifumi Okamoto ◽  
Akihiko Nakajima
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
21St Century ◽  
High Performance ◽  
Cost Effective ◽  
Si Solar Cell

Out-of-Autoclave (OOA) Manufacturing Technologies for Composite Sandwich Structures

2017 ◽  
pp. 292-317
Author(s):  
Laraib Alam Khan ◽  
Wajid Ali Khan ◽  
S. Ahmed
Keyword(s):  
High Performance ◽  
Sandwich Structures ◽  
Cost Effective ◽  
Filament Winding ◽  
Composite Sandwich ◽  
Recent Developments ◽  
Belt Press ◽  
Out Of Autoclave ◽  
Manufacturing Technologies ◽  
Processing Techniques

This chapter gives an overview of cost effective processing techniques, employed for manufacturing of sandwich structures, primarily for high performance applications. The scope of this chapter is to review the processes which may produce the autoclave cured quality parts, without the use of autoclave. The chapter starts with an overview of autoclave processing, highlighting the different features, which depicts the capacity of technique to produce highly repeatable parts. Studies related to manufacturing of sandwich structures in autoclave, with and without adhesive film, are reviewed and discussed. Process briefs and recent developments of different out of autoclave (OOA) techniques for manufacturing of sandwich structures are then discussed which includes, OOA prepregs systems, Quickstep processing, Vacuum Infusion Process, compression molding, double belt press and filament winding. A brief overview of manufacturing processes for thermoplastic based sandwich structures is also provided at the end.

Mineral/microfibrillated cellulose composite materials: High performance products, applications, and product forms

TAPPI Journal ◽  
2018 ◽  
Vol 17 (09) ◽  
pp. 507-515 ◽  
Author(s):  
David Skuse ◽  
Mark Windebank ◽  
Tafadzwa Motsi ◽  
Guillaume Tellier
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
Aqueous Suspension ◽  
Production Capacity ◽  
Cost Savings ◽  
Cost Effective ◽  
New Materials ◽  
Wet Strength ◽  
Product Forms ◽  
Cellulose Composite

When pulp and minerals are co-processed in aqueous suspension, the mineral acts as a grinding aid, facilitating the cost-effective production of fibrils. Furthermore, this processing allows the utilization of robust industrial milling equipment. There are 40000 dry metric tons of mineral/microfbrillated (MFC) cellulose composite production capacity in operation across three continents. These mineral/MFC products have been cleared by the FDA for use as a dry and wet strength agent in coated and uncoated food contact paper and paperboard applications. We have previously reported that use of these mineral/MFC composite materials in fiber-based applications allows generally improved wet and dry mechanical properties with concomitant opportunities for cost savings, property improvements, or grade developments and that the materials can be prepared using a range of fibers and minerals. Here, we: (1) report the development of new products that offer improved performance, (2) compare the performance of these new materials with that of a range of other nanocellulosic material types, (3) illustrate the performance of these new materials in reinforcement (paper and board) and viscosification applications, and (4) discuss product form requirements for different applications.

Parallel Computing for Tire Simulations

2011 ◽  
Vol 39 (3) ◽  
pp. 193-209 ◽  
Author(s):  
H. Surendranath ◽  
M. Dunbar
Keyword(s):  
High Performance ◽  
Effective Means ◽  
Cost Effective ◽  
Turnaround Time ◽  
Careful Consideration ◽  
Rolling Contact ◽  
Element Analysis ◽  
Parallel Solvers ◽  
Design Changes ◽  
Highly Nonlinear

Abstract Over the last few decades, finite element analysis has become an integral part of the overall tire design process. Engineers need to perform a number of different simulations to evaluate new designs and study the effect of proposed design changes. However, tires pose formidable simulation challenges due to the presence of highly nonlinear rubber compounds, embedded reinforcements, complex tread geometries, rolling contact, and large deformations. Accurate simulation requires careful consideration of these factors, resulting in the extensive turnaround time, often times prolonging the design cycle. Therefore, it is extremely critical to explore means to reduce the turnaround time while producing reliable results. Compute clusters have recently become a cost effective means to perform high performance computing (HPC). Distributed memory parallel solvers designed to take advantage of compute clusters have become increasingly popular. In this paper, we examine the use of HPC for various tire simulations and demonstrate how it can significantly reduce simulation turnaround time. Abaqus/Standard is used for routine tire simulations like footprint and steady state rolling. Abaqus/Explicit is used for transient rolling and hydroplaning simulations. The run times and scaling data corresponding to models of various sizes and complexity are presented.

A Compact Embodiment of Pluralities and Denial of Origins: Atwood’s The Year of The Flood

2016 ◽  
Vol 1 (3) ◽  
pp. 141
Author(s):  
Rana Sağıroğlu
Keyword(s):  
Science Fiction ◽  
21St Century ◽  
Social Order ◽  
Margaret Atwood ◽  
Rapid Change ◽  
The Novel ◽  
The World ◽  
Narrative Techniques ◽  
Why Questions ◽  
Near Future

Margaret Atwood, one of the most spectacular authors of postmodern movement, achieved to unite debatable and in demand critical points of 21st century such as science fiction, postmodernism and ecocriticism in the novel The Year of The Flood written in 2009. The novel could be regarded as an ecocritical manifesto and a dystopic mirror against today’s degenerated world, tending to a superficial base to keep the already order in use, by moving away from the fundamental solution of all humanity: nature. Although Atwood does not want her works to be called science fiction, it is obvious that science fiction plays an introductory role and gives the novel a ground explaining all ‘why’ questions of the novel. However, Atwood is not unjust while claiming that her works are not science fiction because of the inevitable rapid change of 21st century world becoming addicted to technology, especially Internet. It is easily observed by the reader that what she fictionalises throughout the novel is quite close to possibility, and the world may witness in the near future what she creates in the novel as science fiction. Additionally, postmodernism serves to the novel as the answerer of ‘how’ questions: How the world embraces pluralities, how heterogeneous social order is needed, and how impossible to run the world by dichotomies of patriarchal social order anymore. And lastly, ecocriticism gives the answers of ‘why’ questions of the novel: Why humanity is in chaos, why humanity has organized the world according to its own needs as if there were no living creatures apart from humanity. Therefore, The Year of The Flood meets the reader as a compact embodiment of science fiction, postmodernism and ecocriticism not only with its theme, but also with its narrative techniques.

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