Newsletter #17

Words From The Editor

Dear Colleague,

 Since last newsletter the ATW 2016 and Eucass 2017 announcements have been published. We encourage our readers to visit the webpages linked above to find more. A brief reminder of the specificity of each event will be presented below for your convenience.

The usual brief review and characterization of interesting papers published since last newsletter is present, as well an example of some interesting patents applications in the field of UAVs, a sector in full expansion with interesting opportunities.


JP Taran

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In this issue

News from Eucass

News from Journals

News from Readers

Recently Published Patents of interest

How to browse the EPO patent list

News from Eucass

ATW 2016

The 2016 AEROSPACE THEMATIC WORKSHOP on "Fundamentals of of Collisions of Fast Particles with Surfaces" will take place during the week of 11-16 September 2016 at the well known CNRS Conference Centre Paul Langevin, Aussois, at the heart of the beautiful French Alps.

This is the very first conference of its kind, in a consecrated series dedicated to the fundamental issues of scientific disciplines relevant to aeronautics and space.

Participants to the previous editions of the workshops have already received an announcement. You can visit the event webpage here.


In the tradition of biannual conferences, the 7th EUCASS conference has been announced and the official website is avaliable at

The conference will be hosted by the Politecnico di Milano at the Campus Bovisa which is located at 20mn from the historical city center and well served by public transport.

The conference will be coordinated with that of partner association CEAS which is scheduled in Bucharest (see here). Among others, joint sessions will be organised.

We do not need to remind to our readers that EUCASS is the high-level forum for all aeronautics and space research players in Greater Europe, including Russia. It is dedicated to the promotion of enabling sciences and technologies. It is also the place where scientists can gain a comprehensive picture of European accomplishments. EUCASS is the natural venue for decision makers as well as an opportunity for young scientists to meet their peers and the industry leaders.

You'll find all furtther informations at event website reminded above.


News from Journals

For your convenience, starting from newsletter #10 we  provide for each article the keywords selected by the respective journal editor.

At the same time, our newsletter editor or his helper is classifying the most interesting articles for EUCASS according to our areas of interest.

You'll find below first the EUCASS classification with links to the proper article in the classical article list based on the different journals presented in this newsletter.

Thermophysics and Aeromechanics


Since last newsletter, Volume 23 Issue 1 has been released: 

The toc for the this issue is reported below for your convenience.


Problems and outlooks for petrothermal power engineering (review)
Alekseenko, S. V. and Borodulin, V. Yu. and Gnatus, N. A. and Nizovtsev, M. I. and Smirnova, N. N.
Pages: 1–16
Keywords: Geo power plant, geothermal energy, hydrothermal resources, petrothermal power engineering,

Evaporation of liquid droplets from a surface of anodized aluminum
Kuznetsov, G. V. and Feoktistov, D. V. and Orlova, E. G.
Pages: 17–22
Keywords: contact angle, contact spot diameter, pinning mode, specific evaporation rate, spreading mode,

Heat and mass transfer at adiabatic evaporation of binary zeotropic solutions
Makarov, M. S. and Makarova, S. N.
Pages: 23–32
Keywords: adiabatic evaporation, binary solution, boundary layer, heat and mass transfer,

Computation of leading edge film cooling from a console geometry (converging slot hole)
Guelailia, A. and Khorsi, A. and Hamidou, M. K.
Pages: 33–42
Keywords: film cooling efficiency, gas turbine blade, numerical simulation,

Impact of incident mach wave on supersonic boundary layer
Vaganov, A. V. and Ermolaev, Yu. G. and Kolosov, G. L. and Kosinov, A. D. and Panina, A. V. and Semionov, N. V. and Yatskikh, A. A.
Pages: 43–48
Keywords: boundary layer, experimental studies, flat plate, hot-wire anemometry, sharp and blunt leading edges, supersonic velocities, wind tunnel,

Numerical simulation of the influence of the control surfaces deflection on the aerodynamics of a slender axisymmetric configuration
Mazhul, I. I. and Volkov, V. F. and Zvegintsev, V. I. and Ivanov, I. V.
Pages: 49–58
Keywords: numerical simulation, supersonic velocities,

Dynamics of momentumless turbulent wake in a shear flow of a linearly stratified medium
Voropaeva, O. F. and Chernykh, G. G.
Pages: 59–68
Keywords: momentumless turbulent wake,

Thermal performance enhancement in tubes using helically twisted tape with alternate axis inserts
Yongsiri, K. and Thianpong, C. and Nanan, K. and Eiamsa-ard, S.
Pages: 69–81
Keywords: heat exchanger, heat transfer enhancement, helically twisted tape, helical tape, turbulence,

Forces acting on a stationary sphere in power-law fluid flow near the wall
Bocharov, O. B. and Kushnir, D. Yu.
Pages: 83–95
Keywords: flow around sphere, numerical simulation, power-law fluid, the drag force, the lift force, wall-bounded flow,

Influence of thermophoresis on heat and mass transfer under non-darcy mhd mixed convection along a vertical flat plate embedded in a porous medium in the presence of radiation
Kishan, N. and Jagadha, S.
Pages: 97–108
Keywords: implicit finite difference scheme, MHD, mixed convection, non-Darcy porous medium, thermal radiation, thermophoresis,

Single-phase stefan problem in selectively absorbing medium
Sleptsov, S. D. and Rubtsov, N. A. and Savvinova, N. A.
Pages: 109–117
Keywords: emissivity, heat removal, radiant-conductive heat transfer, selectivity, Stefan problem,

Plasma treatment of wood
Volokitin, G. G. and Skripnikova, N. K. and Sinitsyn, V. A. and Volokitin, O. G. and Shekhovtsov, V. V. and Vaschenko, S. P. and Kuz’min, V. I.
Pages: 119–124
Keywords: electroplasma setup, protective-decorative coating, temperature field, wood surface treatment,

Reduction of noxious substance emissions at the pulverized fuel combustion in the combustor of the bkz-160 boiler of the almaty heat electropower station using the “overfire air” technology
Askarova, A. S. and Messerle, V. E. and Ustimenko, A. B. and Bolegenova, S. A. and Bolegenova, S. A. and Maximov, V. Yu. and Yergalieva, A. B.
Pages: 125–134
Keywords: combustion, computational experiment, heat and mass transfer, overfire air,

Experimental study of the speed of sound in liquid and gaseous refrigerant r-407c
Komarov, S. G. and Stankus, S. V.
Pages: 135–137
Keywords: liquid, method of ultrasonic interferometer, refrigerant R-407C, speed of sound, vapor,

Experimental investigation of thermal processes in the multi-ring couette system with counter rotation of cylinders
Mamonov, V. N. and Nazarov, A. D. and Serov, A. F. and Terekhov, V. I.
Pages: 139–142
Keywords: coaxial cylinders, Couette ring system, counter rotation, dissipation, heat generator,

Gas-flow exergy at heat supply and kinetic energy dissipation
Latypov, A. F.
Pages: 143–145
Keywords: dissipation, exergy, gas flow, heat supply/removal,

100th Anniversary of the birth of Ivan I. Novikov

Journal of Aerospace Engineering


Since last newsletter, two new issues have been released:

The toc for this last issue N.6 is reported below for your convenience.


Numerical investigation of fragmentation initiation threshold for sphere impacting on thin wall at hypervelocity
Zhang, X. and Liu, T. and Li, X.
Pages: 967–980
Keywords: Finite element method,space debris,spacecraft shielding,failure criteria,hypervelocity impact

Investigations of rotating instability and fluctuating tip clearance flow in a low-speed axial compressor
Wang, H. and Wu, Y. and Ouyang, H. and Tian, J. and Du, Z.
Pages: 981–994
Keywords: Rotating instability,fluctuating tip clearance flow,unsteady pressure measurements,numerical computational fluid dynamics simulations,frequency characteristics

Multiphase trajectory optimization for gun-launched glide guided projectiles
Chen, Q. and Wang, Z. and Chang, S. and Fu, J.
Pages: 995–1010
Keywords: Guided projectile,gun-launched,glide,multiphase trajectory optimization,Gauss pseudospectral method

Matrix weighted multisensor data fusion for ins/gnss/cns integration
Hu, G. and Gao, S. and Zhong, Y. and Gao, B. and Subic, A.
Pages: 1011–1026
Keywords: INS/GNSS/CNS integration,multisensor system,data fusion,weighting matrix,Kalman filtering

Robust adaptive finite time control for spacecraft global attitude tracking maneuvers
Gao, J. and Cai, Y.
Pages: 1027–1043
Keywords: Attitude tracking,sliding mode,gain adaptation,finite-time control,robustness,geometric homogeneity

Numerical study on vibration stress of rotating fan blade under aerodynamic load at critical speed
Kou, H.-j. and Lin, J.-s. and Zhang, J.-h.
Pages: 1044–1058
Keywords: Fan blade,resonance,vibration stress,fluid-structure interaction,computational fluid dynamics,finite element modeling

The fault diagnosis of aircraft power system based on inverse problem of fuzzy optimization
Cao, H. and Haiwen, Y. and Zhao, M. and Jian, S. and Limei, Z. and Xin, G.
Pages: 1059–1074
Keywords: Aircraft power system,paroxysmal fault,inverse problem,fuzzy diagnosis theory,Petri net,fault diagnosis

Finite-horizon servo sdre for super-maneuverable aircraft and magnetically-suspended cmgs
Geranmehr, B. and Vafaee, K. and Rafee Nekoo, S.
Pages: 1075–1093
Keywords: Finite-time convergence,servo,state-dependent Riccati equation,super-maneuverable aircraft,magnetically suspended control moment gyro

Computational fluid dynamics-based virtual flight simulation of a flying wing micro air vehicle
Cai, H. and Wu, Z. and Li, Z. and Xiao, T.
Pages: 1094–1102
Keywords: Virtual flight,flying wing,micro air vehicle,momentum source,prediction-correction

A new approach in uav path planning using bezier-dubins continuous curvature path
Askari, A. and Mortazavi, M. and Talebi, H. and Motamedi, A.
Pages: 1103–1113
Keywords: Path planning,unmanned aerial vehicle,continuous curvature path,Dubins path,Bezier curve

Star selection strategy using measurement coupling matrix in starlight doppler-based integrated navigation system
Liu, J. and Fang, J.-C. and Yang, Z.-H. and Liu, G. and Wu, J.
Pages: 1114–1125
Keywords: Star selection,measurement,Doppler effects,navigation,X-ray pulsar

Experimental study of the vortex flow and aerodynamic characteristics of a reverse delta wing
Lee, T. and Ko, L.
Pages: 1126–1138
Keywords: Reverse delta wing,experimental aerodynamics,particle image velocimetry

Design point analysis of the turbofan-driven turboelectric distributed propulsion system with boundary layer ingestion
Liu, C. and Valencia, E. and Teng, J.
Pages: 1139–1149
Keywords: Distributed propulsion,TeDP,BLI,N3-X

Acta Astronautica


Since the last newsletter Volume 122 has been completed and Volume 123 has been issued by the International Academy of Astronautics. The last volume, currently in progress, is number 126 and it is due for September/October 2016 (see journal page here). Volumes 124 and 125 are not announced yet.

The toc at the time of this writing is reported below for your convenience.


Numerical study of hypersonic flows over reentry configurations with different chemical nonequilibrium models
Hao, Jiaao and Wang, Jingying and Lee, Chunhian
Pages: 1–10
Keywords: Hypersonic; Chemical reaction model; Thermal nonequilibrium

Orbital debris hazard insights from spacecraft anomalies studies
McKnight, Darren S.
Pages: 27–34

Design of a cusped field thruster for drag-free flight
Liu, H. and Chen, P.B. and Sun, Q.Q. and Hu, P. and Meng, Y.C. and Mao, W. and Yu, D.R.
Pages: 35–39

Impact fragmentation model developments
Sorge, Marlon E. and Mains, Deanna L.
Pages: 40–46

A new approach to predict and estimate enhancements of “killer” electron flux at geosynchronous orbit
Potapov, Alexander and Ryzhakova, Larisa and Tsegmed, Battuulai
Pages: 47–51

Strategic map for exploring the ocean-world enceladus
Sherwood, Brent
Pages: 52–58

Characteristics of mineral nutrition of plants in the bio-technical life support system with human wastes included in mass exchange
Tikhomirova, Natalia and Ushakova, Sofya and Kalacheva, Galina and Tikhomirov, Alexander
Pages: 59–65

Innovative hazard detection and avoidance strategy for autonomous safe planetary landing
Jiang, Xiuqiang and Li, Shuang and Tao, Ting
Pages: 66–76

Effect of satellite formations and imaging modes on global albedo estimation
Nag, Sreeja and Gatebe, Charles K. and Miller, David W. and de Weck, Olivier L.
Pages: 77–97

Attitude tracking control for spacecraft formation with time-varying delays and switching topology
Yang, Hongjiu and You, Xiu and Hua, Changchun
Pages: 98–108

Drag and heat reduction mechanism induced by a combinational novel cavity and counterflowing jet concept in hypersonic flows
Sun, Xi-wan and Guo, Zhen-yun and Huang, Wei and Li, Shi-bin and Yan, Li
Pages: 109–119

Dynamic characteristics of vibration isolation platforms considering the joints of the struts
Zhang, Jingrui and Guo, Zixi and Zhang, Yao
Pages: 120–137

Nonlinear filtering for autonomous navigation of spacecraft in highly elliptical orbit
Vigneron, Adam C. and de Ruiter, Anton H.J. and Burlton, Bruce V. and Soh, Warren K.H.
Pages: 138–149

Risk to space sustainability from large constellations of satellites
Bastida Virgili, B. and Dolado, J.C. and Lewis, H.G. and Radtke, J. and Krag, H. and Revelin, B. and Cazaux, C. and Colombo, C. and Crowther, R. and Metz, M.
Pages: 154–162

Experimental analysis of sic-based refractory concrete in hybrid rocket nozzles
D’Elia, Raffaele and Bernhart, Gérard and Hijlkema, Jouke and Cutard, Thierry
Pages: 168–177
Keywords: Hybrid rocket motor; Nozzle materials; Silicon carbide; Refractory concrete; Material ablation; Oxidation

Rosetta following a living comet
Accomazzo, Andrea and Ferri, Paolo and Lodiot, Sylvain and Pellon-Bailon, Jose-Luis and Hubault, Armelle and Porta, Roberto and Urbanek, Jakub and Kay, Ritchie and Eiblmaier, Matthias and Francisco, Tiago
Pages: 190–198

Using modified ballistic limit equations in spacecraft risk assessments
Schonberg, William P.
Pages: 199–204

Giada – grain impact analyzer and dust accumulator – onboard rosetta spacecraft: extended calibrations
Della Corte, V. and Sordini, R. and Accolla, M. and Ferrari, M. and Ivanovski, S. and Rotundi, A. and Rietmeijer, F.J.M. and Fulle, M. and Mazzotta-Epifani, E. and Palumbo, P. and et al.
Pages: 205–214

Control of flow separation on a contour bump by jets in a mach 1.9 free-stream: an experimental study
Lo, Kin Hing and Zare-Behtash, Hossein and Kontis, Konstantinos
Pages: 229–242
Keywords: Contour bump; Active jet; Supersonic free-stream

Characterization of abandoned rocket body families for active removal
Pardini, Carmen and Anselmo, Luciano
Pages: 243–257
Keywords: Space debris; Environmental criticality; Ranking index; Active removal; Geopolitical distribution; Abandoned rocket bodies in LEO

Thermocapillary migration of an isolated droplet and interaction of two droplets in zero gravity
Alhendal, Yousuf and Turan, Ali and Kalendar, Abdulrahim
Pages: 265–274

Lidar-based relative navigation with respect to non-cooperative objects
Woods, John O. and Christian, John A.
Pages: 298–311
Keywords: Relative navigation; Spacecraft rendezvous; LIDAR; OUR-CVFH

Effective methodology to derive strategic decisions from esa exploration technology roadmaps
Cresto Aleina, Sara and Viola, Nicole and Fusaro, Roberta and Saccoccia, Giorgio
Pages: 316–324
Keywords: Technology roadmap; Space exploration; Technology Readiness Level

Diameter and position effect determination of diaphragm on hybrid rocket motor
Sun, Xingliang and Tian, Hui and Cai, Guobiao
Pages: 325–333
Keywords: Diaphragm effect; Regression rate; Combustion efficiency; Hybrid rocket motor

News from Readers

Moore Law, Tensor Processing and NVIDA's Artificial Intelligence dedicated chip

A reader is excited to share with us a few interesting recent announcements. For a scientist the ever increasing computational power allows to be optimistic about the possibility of tackling ever increasing complex problems in the years to come.


For years there was a sort of rule of thumb that was used to predict how the computational power of future chips would reasonably evolve, that was the Moore's Law. This law, or better yet empirical observation, stated that the number of transistors in a dense integrated circuit doubles approximately every two years.


Without going inside the complexities of CPU and integrated circuits designs, and barring vast amounts of transistors dedicated to legacy and interoperability operations, this meant for many decades an easy way to set targets and reasonable expectations.


When certain dimension where reached however, simple technological and manufacturing process could not keep up anymore with Moore's Law, since other physical factors became preponderant that could be easily ignored when the manufacturing process was coarser than the few nanometers of today.


For reference, the 14-16 nanometer FinFet products are currently mainstream for certain configuration already, i.e. in high-end smartphones and soon in more powerful devices like GPUs. These dimensions are becoming difficult to shrink further on, so for example in certain fields other techniques (i.e. asynchronous shading for GPUs) are used.


It is understandable that many times critics had heralded the end of Moore's law in the past. But IBM with a recent announcement showed that possibly rumors of Moore's Law death were greatly exaggerated: in an announcement held recently in Paris, Intel announced that an old technology, Phase-Change Memory, has been sufficiently refined to be perhaps become exploitable in the immediate future.


This is only the initial announcement. While similar announcements have been ostensibly false in the past, the weight of the announcer makes even the most skeptical of the experts adopt a wait and see approach. Maybe this is really a second coming for the Moore's Law.


Another Technology giant, Google, has instead announced a new type of processor that names "Tensor Processing Unit", and that would bring in their expectations a jump of three generations in the field of Machine Learning.  One analyst speculates that this processor could have the same impact of developing some algorithm for Artificial Intelligence on a traditional CPU, and then implement it in hardware with a FPGA- or ASIC-like design. 


Considering how dedicated chips for specific tasks (i.e. video encoding/decoding) can outperform general purpose CPU in performance for watts, it is not impossible to imagine some of this tools in UAVs, satellites and other similar devices dear to our readers.


And in the field of machine and more specifically deep-learning, the recently released GP100 processor based on the new Pascal architecture seems to promise great advances at a "reasonable" cost.  These new GPUs, with their dedicated communication network (NVLink, to overcome the current standard way of communicating between GPUs and between GPUs and CPUs, the PCI Express standard) will be shipping H2 2016, with some HPC centers already beta testing them in some configurations.


NVIDIA is even selling directly to customers complete solutions calling them "Deep Learning Supercomputer in a box", see link here.


Will any of these announcements have a profound impact in the future of scientific research? It is difficult to say. Advancements in micro-conductors technology are always welcome, while new processors types may not take the market by storm (see the Intel Xeon Phi technology that did not reach a widespread usage at every level of research, like, say, GPGPU computing).


Recently Published Patents of Interest


The following patents have been selected from the EPO database using the following criteria:  "WORD = UAV AND PUA12 >= 20160101". In this case, this means all patents whose A1/A2 documents have been published after the fist January 2016, with somewhere in the text UAV for Unmanned Air Vehicle. Since patents can be filed towards different organizations, sometimes the data available in the EPO database (the version available for free online) is not the most complete. In that case an external link is used.

How to browse the EPO patent list

There are different tools online to browse/search patents, for example google and the wipo. Here we will be using the EPO Patent information services for experts, from this address. It is possible to browse patents based on many parameters, inventor name, applicant/proprietor (usually a company), application date, etc. etc.  In the future we will consider patents that have published their A1/A2 documents since the date of the last newsletter.

The definition of A1 and A2 are available here.