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Defining Reference Area for Prediction of Aerodynamic Coefficients of a Biologically Inspired Hybrid Buoyant Vehicle
2017
Unmanned Systems
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Geometric and volumetric quantities are usually used to define the reference area for the prediction of aerodynamic coefficients of various aquatic mammals, airships and unmanned vehicle. ...
However, reference area does not have a unique definition, especially for a hybrid buoyant aerial vehicle having hybrid lifting hull which resembles a Steller sea lion. ...
Based on the predicted trends of aerodynamic coefficients and a deep literature survey, the projected planform area is proposed as the best option for reference area of a Steller sea lion as well as for ...
doi:10.1142/s230138501750011x
fatcat:axvssipc6zavfaw6vj4uavraqa
Hydrostatic and Hydrodynamic Characteristics of Swimming Animals- an Inspiration for Hybrid Buoyant Aircraft
2016
Animal Review
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Correlation of the geometric and buoyant properties of the swimming animals with the hybrid buoyant aerial vehicles is an example of this hypothesis. ...
It was found that the fineness ratio of this animal is of the same order as the optimum value of that for the condition of minimum drag and power required for the buoyant aerial vehicle. ...
He mentioned that that there is no powerful hydrodynamic basis for the selection of reference area for the estimation of drag coefficient and the same holds good for hybrid aerial vehicles as well. ...
doi:10.18488/journal.ar/2016.3.1/101.1.1.9
fatcat:zb4icsnuprbzpcbu44nwsvakbm
Design and Shape Optimization of Unmanned, Semi-Rigid Airship for Rapid Descent Using Hybrid Genetic Algorithm
2019
2019 International Conference on Unmanned Aircraft Systems (ICUAS)
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Mutation: Mutation in a GA refers to the process of alteration of one or more genes in a chromosome to address genetic diversity in a biological population. ...
Consequently, a hybrid genetic algorithm (HGA), a combination of local search and global search techniques, is employed on the mathematical model of airship hull to optimize its surface area and aerodynamic ...
Then, the convexity of a function can be formally defined as, for a function f i of n variables to be convex on a convex set S, it must satisfy the inequality condition for any two points x and y in S ...
doi:10.1109/icuas.2019.8798185
fatcat:otn5gvvjwvfzzn7hmtgtapzfre
A biologically inspired, flapping-wing, hybrid aerial-aquatic microrobot
2017
Science Robotics
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devices that culminate in a hybrid, aerial-aquatic microrobot. ...
To develop robots capable of hybrid aerial and aquatic locomotion, we require versatile propulsive strategies that reconcile the different physical constraints of airborne and aquatic environments. ...
For rotorcrafts, the vehicle needs to tilt by 90° (12) , and this configuration induces large form drag because of the large exposed frontal area. ...
doi:10.1126/scirobotics.aao5619
pmid:33157886
fatcat:iu6342sbsrarnlaysi54qtgpem
Shark skin-inspired designs that improve aerodynamic performance
2018
Journal of the Royal Society Interface
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Through parametric modelling to query a wide range of different designs, we discovered a set of denticle-inspired surface structures that achieve simultaneous drag reduction and lift generation on an aerofoil ...
Our findings not only open new avenues for improved aerodynamic design, but also provide new perspective on the role of the complex and potentially multifunctional morphology of shark denticles for increased ...
Specifically, biological systems have evolved a wide range of drag reducing mechanisms that have inspired the design of synthetic surfaces [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] . ...
doi:10.1098/rsif.2017.0828
pmid:29436512
fatcat:vvhpivs4wbcijfpzjbwwht36gi
Continuous Open Access Special Issue "Aircraft Design": Number 2 / 2020
[article]
2020
Zenodo
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As such, the Special Issue "Aircraft Design" can be a home for all those working in the field who regret the absence of an aircraft design journal. SI-2/2020 contains seven papers; an Editorial: 1.) ...
Design Space Exploration of Jet Engine Components, 4.) Study of Subsonic Wing Flutter, 5.) Design Optimization of a Blended Wing Body Aircraft, 6.) Discrete Mobile Control Surfaces, 7.) ...
Acknowledgments: The presented work is part of the electro-impulse de-icing system for aircraft, which is funded by State Grid Corporation of China. ...
doi:10.5281/zenodo.4624993
fatcat:vkm2umjhcbekzba4x6rbt22pla
Living systems, 'total design' and the evolution of the automobile: the significance and application of holistic design methods in automotive design, manufacture and operation
[chapter]
2006
Design and Information in Biology
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Pugh's 'total design' method is described as a linear activity in that product manufacture and use are considered but not what happens to the product at the end of life. ...
During the latter decades of the 20th century as products became increasingly complex it became necessary to formalise engineering and product design methods, reputed exponents of which include Gerhard ...
and vehicles with particular reference to solar powered cars), which demonstrated how a low coefficient of drag (C d ) contributes to energy efficiency. ...
doi:10.2495/978-1-85312-853-0/13
fatcat:wuvhjpvqgfhxnboux5frpxkb2q
Operational, regional-scale, chemical weather forecasting models in Europe
2011
Atmospheric Chemistry and Physics Discussions
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Such a single point of reference for European CWF information has not previously been operational. ...
Sometimes the term biological weather forecasting is used to refer to forecasting of biological constituents in the air, such as various pollen species and airborne allergens. which are the optimal ones ...
Comparison studies of the various chemical sub-models. ...
doi:10.5194/acpd-11-5985-2011
fatcat:ea5r4uylxbcxje6jeak7cnq2hy
Table of Contents
2016
Australian Journal of Primary Health
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The report will recommend acceptable levels of a change in acceleration over a defined time for transit vehicles for several passenger conditions, acceleration conditions, and vehicle types in reference ...
In task five we develop a numerical model to predict the performance of the hybrid CLT systems under static and dynamic loads. Preliminary results are shown for these two tasks. ...
doi:10.1071/pyv22n4toc
fatcat:hrwhnxdpjreslhuwi7y4edqmo4
A review of operational, regional-scale, chemical weather forecasting models in Europe
2012
Atmospheric Chemistry and Physics
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focus areas: emission inventories, the integration of numerical weather prediction and atmospheric chemical transport models, boundary conditions and nesting of models, data assimilation of the various ...
Finally, this article highlights the most prominent gaps of knowledge for chemical weather forecasting models and suggests potential priorities for future research directions, for the following selected ...
Kenneth Schere (US Environmental Protection Agency) is thanked for a thorough review of this article, and for his many valuable comments. Edited by: R. Vautard ...
doi:10.5194/acp-12-1-2012
fatcat:dfu7klhg3bf2lafhc7xlnp65cu
Space Tourism — From Dream to Reality
[chapter]
2002
Beyond the International Space Station: The Future of Human Spaceflight
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Shuxing Feng created the title of this report, From Dream to Reality. It is a reference to the dream or folk tale in China of travelling to the Moon to visit the mystical princess who lives there. ...
On the back cover a painting depicts the elegance and romance of love with no bounds. Cover design by Patricia Garner. Front cover image courtesy of NASA, vehicle sketch by Li-Te Cheng. ...
1 Introduction "Sure it´s expensive…But what´s the cost of an unfulfilled dream?" -Mike Saemisch [Triplett, 1994] ...
doi:10.1007/978-94-015-9880-4_31
fatcat:fy3a3afdrfgs3mjfdmuo7gh2ve
Green's-function reaction dynamics: A particle-based approach for simulating biochemical networks in time and space
2005
Journal of Chemical Physics
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AM we present two applications of this hybrid meteorological-acoustical calculation scheme: i͒ propagation of impulse noise in a coastal area, and ii͒ propagation of industrial noise in a rural area with ...
On the prediction of absorption coefficient of porous materials with Finite Elements. ...
We explore this phenomenon by evaluating the ЉAuditory Image ModelЉ ͑AIM͒, a biologically inspired model of the human auditory system from the outer ear up to central processing. ...
doi:10.1063/1.2137716
pmid:16392952
fatcat:tyehqewfnzahfju3rxvivugvaa
Nonnative listeners prefer perceptual cues they know from their L1: Dutch listeners use vowel duration less than English listeners for English final /v/‐/f/
2008
Journal of the Acoustical Society of America
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AM we present two applications of this hybrid meteorological-acoustical calculation scheme: i͒ propagation of impulse noise in a coastal area, and ii͒ propagation of industrial noise in a rural area with ...
On the prediction of absorption coefficient of porous materials with Finite Elements. ...
We explore this phenomenon by evaluating the ЉAuditory Image ModelЉ ͑AIM͒, a biologically inspired model of the human auditory system from the outer ear up to central processing. ...
doi:10.1121/1.2933287
fatcat:gqdetkftz5cmrghkql35figuw4
On determination of microphone response and other parameters by a hybrid experimental and numerical method
2008
Journal of the Acoustical Society of America
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A hybrid method for jet noise predictions based on Large Eddy Simulation and Reynolds-Averaged Navier-Stokes simulations. ...
On the prediction of absorption coefficient of porous materials with Finite Elements. ...
We explore this phenomenon by evaluating the ЉAuditory Image ModelЉ ͑AIM͒, a biologically inspired model of the human auditory system from the outer ear up to central processing. ...
doi:10.1121/1.2933455
fatcat:gl6kkwih6rbkriigc7g6ghdlnq
Relationship between room shape and acoustics of rectangular concert halls
2008
Journal of the Acoustical Society of America
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A hybrid method for jet noise predictions based on Large Eddy Simulation and Reynolds-Averaged Navier-Stokes simulations. ...
On the prediction of absorption coefficient of porous materials with Finite Elements. ...
We explore this phenomenon by evaluating the ЉAuditory Image ModelЉ ͑AIM͒, a biologically inspired model of the human auditory system from the outer ear up to central processing. ...
doi:10.1121/1.2933354
fatcat:eymbpllxwjcfdbkedeijrtwbwq
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