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Institution

National Aerospace Laboratories

FacilityBengaluru, India
About: National Aerospace Laboratories is a facility organization based out in Bengaluru, India. It is known for research contribution in the topics: Coating & Corrosion. The organization has 1838 authors who have published 2349 publications receiving 36888 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, a modified evolutionary structural optimisation (ESO) algorithm for optimal design of a stringer cutout used in many pressured fuselages of transport aircrafts is studied.

11 citations

Journal ArticleDOI
TL;DR: In this paper, the authors used polyamide 12-SiO2 nanocomposite (NC) on glass substrates by the spin-coating method and showed that the transformation from hydrophobic to super-hydrophobic is achieved with increase in roughness, which increases with SiO2 content.
Abstract: Optically transparent hydrophobic and superhydrophobic coatings have been prepared using polyamide 12–SiO2 nanocomposite (NC) on glass substrates by the spin-coating method. The coatings have been optimized for their hydrophobicity and transparency. The transformation from hydrophobic to superhydrophobic is achieved with increase in roughness (Ra) which increases with SiO2 content. These coatings are highly transparent in the entire visible region (400–800 nm). The influence of layer thickness on water contact angle (WCA) and optical transmittance of the coatings has been studied. Field emission scanning electron micrograph (FESEM) shows the presence of SiO2 nanoparticles covered with polyamide homogenously on the surface and the particles are aggregated to form a rough structure. X-ray diffraction (XRD) patterns show that the polyamide losses its crystalline structure in the composite. The preparation procedure reported here is simple and eco-friendly. The dual nature of the coatings, that is, high transparency and superhydrophobicity in the entire visible region suggests for its potential usage in self-cleanings, wind screen and optoelectronic applications. Copyright © 2016 John Wiley & Sons, Ltd.

11 citations

Journal ArticleDOI
TL;DR: In this article, the authors present the latest developments in the least squares kinetic upwind method (LSKUM), a kinetic theory based grid free approach for the solution of Euler equations.

11 citations

Proceedings ArticleDOI
01 Jan 1998
TL;DR: In this paper, a comparison between supersonic combustion in two commonly used, but fundamentally different, facilities for scramjet research - a vitiation-heated blowdown tunnel and a free piston shock tunnel -was made.
Abstract: A comparison has been made between supersonic combustion in two commonly used, but fundamentally different, facilities for scramjet research - a vitiation-heated blowdown tunnel and a free piston shock tunnel. By passing the shock tunnel freestream flow through a normal shock and then expanding it to Mach 2.5, combustor inlet conditions were nominally replicated between the two facilities, as were the combustor geometries. A straight rectangular duct and a diverging duct, both employing central strut hydrogen injection, were used. Boundary layer growth and separation in the straight duct limited meaningful comparisons to a fuel equivalence ratio Φ of the order of 0.20. With the diverging duct, comparisons were made up to Φ = 1.05. Reasonably good agreement between the two facilities was found, with differences attributable to differences in the flow parameters between the two facilities, particularly the total enthalpy and static temperature, and to the large water content of the vitiation-heated flow.

11 citations

Journal ArticleDOI
TL;DR: In this paper, the experimental strength and stiffness of glass-epoxy composite specimens with varied fiber orientations (±2° to ±88°) prepared by both braided and filament winding techniques were investigated.
Abstract: Investigations were carried out on glass-epoxy composite specimens with varied fibre orientations (±2° to ±88°), prepared by both braided and filament winding techniques. The experimental strength and stiffness of these composites while exhibiting similar trends, correlated well with those predicted by classical laminate theory. The filament wound composites exhibited (20–40%) initial higher properties vis-a-vis the braided composites, while a correlation index between the experimental and theoretical values has been evolved.

11 citations


Authors

Showing all 1850 results

NameH-indexPapersCitations
Harish C. Barshilia462366825
K.S. Rajam42834765
Kozo Fujii394115845
Parthasarathi Bera391365329
R.P.S. Chakradhar361664423
T. N. Guru Row363095186
Takashi Ishikawa361545019
Henk A. P. Blom341685992
S. Ranganathan332115660
S.T. Aruna331014954
Arun M. Umarji332073582
Vinod K. Gaur33924003
Keisuke Asai313503914
K. J. Vinoy302403423
Gangan Prathap302413466
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202310
202216
2021143
2020100
201996
2018119