Experimental and Computational Analysis of a High-Performance Motorcycle Engine

1996 ◽  
Author(s):  
A. A. Boretti ◽  
G. Cantore ◽  
E. Mattarelli ◽  
F. Preziosi
Keyword(s):  
High Performance ◽  
Computational Analysis ◽  
Motorcycle Engine

scholarly journals High Performance Computational Analysis of Large-scale Proteome Data Sets to Assess Incremental Contribution to Coverage of the Human Genome

2013 ◽  
Vol 12 (6) ◽  
pp. 2858-2868 ◽  
Author(s):  
Nadin Neuhauser ◽  
Nagarjuna Nagaraj ◽  
Peter McHardy ◽  
Sara Zanivan ◽  
Richard Scheltema ◽  
...  
Keyword(s):  
Human Genome ◽  
High Performance ◽  
Large Scale ◽  
Computational Analysis ◽  
Data Sets

scholarly journals A combinatorial approach to improving the performance of azoarene photoswitches

2019 ◽  
Vol 15 ◽  
pp. 2753-2764 ◽  
Author(s):  
Joaquin Calbo ◽  
Aditya R Thawani ◽  
Rosina S L Gibson ◽  
Andrew J P White ◽  
Matthew J Fuchter
Keyword(s):  
Benzene Ring ◽  
High Precision ◽  
Half Life ◽  
High Performance ◽  
Computational Analysis ◽  
Experimental Measurements ◽  
Combinatorial Approach ◽  
Switch Architecture ◽  
Key Innovations

Azoarenes remain privileged photoswitches – molecules that can be interconverted between two states using light – enabling a huge range of light addressable multifunctional systems and materials. Two key innovations to improve the addressability and Z-isomer stability of the azoarenes have been ortho-substitution of the benzene ring(s) or replacement of one of the benzenes for a pyrazole (to give arylazopyrazole switches). Here we study the combination of such high-performance features within a single switch architecture. Through computational analysis and experimental measurements of representative examples, we demonstrate that ortho-benzene substitution of the arylazopyrazoles drastically increases the Z-isomer stability and allows further tuning of their addressability. This includes the discovery of new azopyrazoles with a Z-isomer thermal half-life of ≈46 years. Such results therefore define improved designs for high performance azo switches, which will allow for high precision optically addressable applications using such components.

Development of High Performance Four-Cycle Motorcycle Engine Oils

2008 ◽  
Author(s):  
Akira Yaguchi ◽  
Hiroyuki Hoshino ◽  
Kazuhiro Yagishita ◽  
Kenichi Komiya ◽  
Masatoshi Akagi
Keyword(s):  
High Performance ◽  
Engine Oils ◽  
Motorcycle Engine

scholarly journals Computational analysis of novel high performance optically controlled RF switches for reconfigurable millimeterwave-to-THz circuits

OSA Continuum ◽  
2021 ◽  
Vol 4 (10) ◽  
pp. 2642
Author(s):  
Yu Shi ◽  
Yijing Deng ◽  
Jun Ren ◽  
Peizhao Li ◽  
Patrick Fay ◽  
...  
Keyword(s):  
High Performance ◽  
Computational Analysis ◽  
Rf Switches

New Approach to Development of Packaging for MEMS Inertial Sensors

2001 ◽  
Author(s):  
Ryszard J. Pryputniewicz ◽  
Thomas F. Marinis ◽  
David S. Hanson ◽  
Cosme Furlong
Keyword(s):  
Performance Evaluation ◽  
Material Properties ◽  
High Performance ◽  
Computational Analysis ◽  
Inertial Sensors ◽  
Inertial Sensor ◽  
Process Conditions ◽  
New Approach ◽  
Laser Interferometric ◽  
Extensive Performance

Abstract Development of MEMS inertial sensor packages for high performance applications cannot be accomplished by analysis alone. There are too many unknown material properties, process conditions, and assembly tolerances to make this feasible. Extensive performance evaluation of packaged sensors is also prohibitively expensive and time consuming. However, recent advances in the ACES methodology of micro-interferometric measurements coupled with analytical and computational analysis offer a considerable promise for effective optimization of the design of advanced sensor packages. Sub-micron displacements of sensors can be readily measured with nanometer accuracy over a range of environmental conditions. This greatly facilitates the validation and refinement of quantitative models of packages and complex material structures. This paper describes the new approach, based on optoelectronic laser interferometric microscope methodology, to development of packaging for MEMS inertial sensors and discusses preliminary results that have been obtained.

Numerical and Experimental Analysis of the Intake Flow in a High Performance Four-Stroke Motorcycle Engine: Influence of the Two-Equation Turbulence Models

2007 ◽  
Vol 129 (4) ◽  
pp. 1095-1105 ◽  
Author(s):  
Angelo Algieri ◽  
Sergio Bova ◽  
Carmine De Bartolo ◽  
Alessandra Nigro
Keyword(s):  
Flow Field ◽  
Combustion Chamber ◽  
High Performance ◽  
Laser Doppler Anemometry ◽  
Fluid Dynamic ◽  
Turbulence Models ◽  
Mean Flow ◽  
Intake System ◽  
Cylinder Flow ◽  
Motorcycle Engine

An experimental and numerical analysis of the intake system of a production high performance four-stroke motorcycle engine was carried out. The aim of the work was to characterize the fluid dynamic behavior of the engine during the intake phase and to evaluate the capability of the most commonly used two-equation turbulence models to reproduce the in-cylinder flow field for a very complex engine head. Pressure and mass flow rates were measured on a steady-flow rig. Furthermore, velocity measurements were obtained within the combustion chamber using laser Doppler anemometry (LDA). The experimental data were compared to the numerical results using four two-equation turbulence models (standard k-ε, realizable k-ε, Wilcox k-ω, and SST k-ω models). All the investigated turbulence models well predicted the global performances of the intake system and the mean flow structure inside the cylinder. Some differences between measurements and computations were found close to the cylinder head while an improving agreement was evident moving away from the engine head. Furthermore, the Wilcox k-ω model permitted the flow field inside the combustion chamber of the engine to be reproduced and the overall angular momentum of the flux with respect to the cylinder axis to be quantified more properly.

Experimental and computational analysis of droplet formation in a high-performance flow-focusing geometry

2007 ◽  
Vol 138 (1) ◽  
pp. 203-212 ◽  
Author(s):  
Wee-Liat Ong ◽  
Jinsong Hua ◽  
Baili Zhang ◽  
Teng-Yuan Teo ◽  
Junlong Zhuo ◽  
...  
Keyword(s):  
High Performance ◽  
Computational Analysis ◽  
Droplet Formation ◽  
Flow Focusing ◽  
Performance Flow
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