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Blade Envelopes Part I: Concept and Methodology [article]

Chun Yui Wong, Pranay Seshadri, Ashley Scillitoe, Andrew B. Duncan, Geoffrey Parks
2021 arXiv   pre-print
In this paper, the first of two parts, we discuss its underlying concept and detail its computational methodology, assuming one is interested only in the single objective of ensuring that the loss of all  ...  We introduce the blade envelope as a computational manufacturing guide for a blade that is also amenable to qualitative visualizations.  ...  PS was funded through a Rolls-Royce research fellowship and AS was funded through the Digital Twins in Aeronautics grant as part of the Strategic Priorities Fund EP/T001569/1.  ... 
arXiv:2011.11636v5 fatcat:ijxg5l3hffflfilrmbkzxebvqq

Optimization of Nano-Rotor Blade Airfoil Using Controlled Elitist NSGA-II

Zhen Liu, Longlei Dong, Jean-Marc Moschetta, Jianping Zhao, Guirong Yan
2014 International Journal of Micro Air Vehicles  
The authors would like to thank the support of project 11302164 supported by National Natural Science Foundation of China, project 2012JQ1018 supported by Natural Science Foundation of Shaanxi Province and  ...  multiple disciplines and multiple points.  ...  As the aerodynamic performance of nano rotor blade airfoil remarkably influences nano rotor performance, the airfoil optimization is an important part of rotor design.  ... 
doi:10.1260/1756-8293.6.1.29 fatcat:cjrbl3wwvfebbfrvcqrk5b3bsu

An Integrated Design and Optimization Approach for Radial Inflow Turbines—Part II: Multidisciplinary Optimization Design

Qinghua Deng, Shuai Shao, Lei Fu, Haifeng Luan, Zhenping Feng
2018 Applied Sciences  
This paper proposes an integrated design and optimization approach for radial inflow turbines consisting of an automated preliminary design module and a flexible three-dimensional multidisciplinary optimization  ...  At the same time, it is implied that the preliminary design plays an essential role in the radial inflow turbine design process, and it is hard for only 3-D optimization to get a further performance improvement  ...  In this paper, as Part II, a flexible 3-D multidisciplinary optimization system is developed.  ... 
doi:10.3390/app8112030 fatcat:zwqihavjnfhwvbapwdnu64ymfq

Studies on Biplane Wind Vanes, Ventilator Tabes and Cup Anemometers (II)

M. Sanuki
1950 Papers in Meteorology and Geophysics  
The trend is, however, inversed, i, e., it decreases as the number of blades decrease for blade angle above 30'.  ...  It is to be noted that the researches described in Articles 10, 11 and 12, Chapter 2, Part II, were conducted backed by the Grant in Aid for Developmental Scientific Research of the Ministry of Education  ... 
doi:10.2467/mripapers1950.1.2-4_227 fatcat:t6n3zyb2wvem7eam5zwtxj5pey

3.12 Inspection and Monitoring of Composite Aircraft Structures [chapter]

Roger M. Groves
2018 Comprehensive Composite Materials II  
This article was originally published in Comprehensive Composite Materials II, published by Elsevier, and the attached copy is provided by Elsevier for the author's benefit and for the benefit of the author's  ...  institution, for noncommercial research and educational use including without limitation use in instruction at your institution, sending it to specific colleagues who you know, and providing a copy to  ...  To use this method, the projector must also be calibrated as part of the multi-camera system, usually using the approach of considering the projector as an inverse camera.  ... 
doi:10.1016/b978-0-12-803581-8.10340-6 fatcat:fumafqczq5ddzbrmyyjk6m4xiu

Notices of papers in physiological chemistry; No. II

G. F. Barker
1869 American Journal of Science  
and can its intestinal origin be doubted?  ...  They should be nnmbered (55) and (56), and placed in "heir proper order. ~ C. R.t xlvi, 1264. * C. R., xlvii, 112.  ...  "The object of my communication" he says, "is to establish anatomically and physiologically the fact that beside the various uses without doubt sub served by the placenta, it is designed to accomplish  ... 
doi:10.2475/ajs.s2-47.140.258 fatcat:d466wjhc35badefgh5yptgfloq

Damping of high-temperature shape memory alloys

Kirsten P. Duffy, Santo A. Padula II, Daniel A. Scheiman, Marcelo J. Dapino, Zoubeida Ounaies
2008 Behavior and Mechanics of Multifunctional and Composite Materials 2008  
Researchers at NASA Glenn Research Center have been investigating high temperature shape memory alloys as potential damping materials for turbomachinery rotor blades.  ...  Elevated damping was demonstrated between the M s and M f phase transformation temperatures and between the A s and A f temperatures.  ...  Newer high-performance turbomachinery blade designs have led to decreased blade damping and higher vibratory stresses 1 .  ... 
doi:10.1117/12.776288 fatcat:e5mx5ej3wjgqpfu6oxpiteu42m

Transducer models in the ultrasound simulation program FIELD II and their accuracy

J. A. Jensen, D. Bk
2010 Journal of the Acoustical Society of America  
Ocean Phys. and Eng., Woods Hole Oceanograph.  ...  utilizes the split-step Fourier technique and a 3-D variant of the Thomson and Chapman wide-angle approximation.  ...  Since electric hearing with current cochlear implants is based on envelope information, comodulation of envelopes on multiple electrodes might also be beneficial for detection in electric hearing.  ... 
doi:10.1121/1.3384240 fatcat:m5fvh5cecjceneniqfd5w2y3xy

Soft Robotic Gripper with Compliant Cell Stacks for Industrial Part Handling

Metodi Netzev, Alexandre Angleraud, Roel S. Pieters
2020 IEEE Robotics and Automation Letters  
Robot object grasping and handling requires accurate grasp pose estimation and gripper/end-effector design, tailored to individual objects.  ...  The motivation behind the gripper design is handling of industrial parts, such as jet and Diesel engine components.  ...  ACKNOWLEDGMENT The authors would like to thank Mika Kiirikki and Petri Virta for their insight in internal combustion engines, 3D printing and provision of test parts.  ... 
doi:10.1109/lra.2020.3020546 fatcat:ayft7jqo5fabdikkjds23cxkde

Optimal output feedback for linear time-periodic systems

ANTHONY J. CALISE, MARK E. WASIKOWSKI, DANIEL P. SCHRAGE
1992 Journal of Guidance Control and Dynamics  
The envelope term is defined by using the constant part of Q,(¥) 2h+1 {u7Ru}, = r| ) > KEEOTROE a (18) i=l | ifi=1 " ~ po (19) and A is the number of harmonics used.  ...  It can be seen that use of the modified performance index in Eq. (23) achieves the objective of altering the in-plane response envelope, thus adding modal damping directly to the in-plane mode.  ... 
doi:10.2514/3.20852 fatcat:wdlk4sxbn5fbfhbe5brlkgu4my

Understanding the potential of Self-Protection Jamming on board of miniature UAVs

Christos V. Ilioudis, Carmine Clemente, John Soraghan
2019 2019 International Radar Conference (RADAR)  
Unarmed Aerial Vehicle (UAV) systems are very challenging targets due to their small size and ability to fly in low altitudes and speed.  ...  Particularly, in radar systems UAVs can exhibit similar radar cross section and Doppler parameters to clutter returns such as birds and trees.  ...  with 90% overlap. having a pronounced envelope and similar profile for both sides of the blade.  ... 
doi:10.1109/radar41533.2019.171405 fatcat:epuyioxi5zfefmglgjuvqy65ce

PART II: NATURE-STUDY IN SCHOOLS [chapter]

2019 Nature Guiding  
The growth of plants and animals depends upon the multiplication of these cells.  ...  design."-" Outline of Botany" (1819) , Dr.  ...  Have the seeds named and used in games of touch, sight, smell, and sound. Make designs with them. 4 10. Signs of Spring. March through June.  ... 
doi:10.7591/9781501740862-005 fatcat:jv6lktlvmzbnremp42by4qf2mq

Design of a 3.4‐MW wind turbine with integrated plasma actuator‐based load control

Mayank Chetan, M. Sadman Sakib, D. Todd Griffith, Abhineet Gupta, Mario A. Rotea
2021 Wind Energy  
K E Y W O R D S active load control, blade design, controllable Gurney flap, iterative sequential design, LCOE analysis, loads analysis, plasma actuator, rotor design | INTRODUCTION With the advancement  ...  To achieve these results, a comprehensive sequential-iterative design procedure is introduced to integrate the controllable Gurney flap into the turbine design and to drive the design solution toward the  ...  Any opinions, findings, and conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of ARPA-E.  ... 
doi:10.1002/we.2684 fatcat:mteyg3dj25aibow3nlx4637u2q

Optical In-Process Measurement: Concepts for Precise, Fast and Robust Optical Metrology for Complex Measurement Situations

Ralf B. Bergmann, Michael Kalms, Claas Falldorf
2021 Applied Sciences  
Preferably, measurements should take place within the production line (in-process) and keep pace with production speed, even if the parts have a complex geometry or are difficult to access.  ...  Concerning interferometric techniques, we report on fast acquisition as used in holography, tailoring of coherence properties and use of Multiple simultaneous Viewing direction holography (MultiView),  ...  Li from VEW Bremen in the BLADE project mentioned in the funding section and for the collaboration with industrial members of the committee associated with the IGF-project mentioned in the funding section  ... 
doi:10.3390/app112210533 fatcat:3t7aw6uupvgt7pkcxmqi56u6lm

100 An Open, Randomised, Explorative, Phase II, Investigation Comparing Enamel Matrix Derivative Proteins (EMD) and Control In Patients With Pressure Ulcer Stage II

AM. Dierick, Dirk Van De Looverbosch, Hilde Heyman, Dieter Van De Looverbosch
2004 Wound Repair and Regeneration  
enveloped viruses.  ...  TGF-ß1, ß2 and ß3 isoforms signal by sequentially binding to the TGF-ß type II and type I receptors, respectively.  ...  Objective To investigate the histological characteristics and pathophysiological changes in diabetic skin.  ... 
doi:10.1111/j.1067-1927.2004.0abstractct.x fatcat:sqjlqcdtyzf33imuo4i3wz2nte
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