TY  - JOUR
AU  - Linić, Suzana
AU  - Lučanin, Vojkan J.
AU  - Živković, Srđan P.
AU  - Raković, Marko
AU  - Ristić, Slavica S.
AU  - Radojković, Bojana
AU  - Polić, Suzana R.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4240
AB  - A multidisciplinary research method was employed with the intention to create a series of bio-inspired flattened airfoils, observe their aerodynamic characteristics, and analyse their applicability to small devices or to designs of high-speed trains, within the shortest period in the conceptual stage. A research specimen of a kingfisher, selected for biomimicry, was examined with the following methods: visual inspection, analysis of photographs, manufacturing quality control measurement with a 3D laser scanner, and microscopy. A basic multi-arc-line profile, re-engineered from the overlapped specimen shape data and based on the observations, was used for designing a series of seven derived airfoils. The aerodynamic characteristics of the bio-inspired airfoils were obtained with the panel methods at low and moderate subsonic speeds, while the small transonic difference method was used in the high-subsonic speed range. Basic and ellipse-like airfoils produce higher total drag at low and moderate velocities and higher forebody drag in the high-subsonic range when compared to derived and parabola-like airfoils. The obtained critical Mach numbers are in the range from 0.76 to 0.78, where three bionic airfoils show values equal to or smaller than the values of ellipse- and parabola-like airfoils. The profile with the shortest bio-inspired relative chord has a higher critical Mach number value than the parabola-like profile. The sonic lines above these profiles appear at close positions. The applied set of examination methods of the bio-inspired design is not time consuming and produces sufficiently good results in the conceptual stage. Therefore, a further development of unique and adjusted numerical methods and codes at pre-computational fluid dynamics run is encouraged, together with shape parameterization.
PB  - Springer Nature Switzerland AG 2020
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage
VL  - 43
IS  - 1
SP  - 57
DO  - 10.1007/s40430-020-02789-2
ER  - 

@article{
author = "Linić, Suzana and Lučanin, Vojkan J. and Živković, Srđan P. and Raković, Marko and Ristić, Slavica S. and Radojković, Bojana and Polić, Suzana R.",
year = "2021",
abstract = "A multidisciplinary research method was employed with the intention to create a series of bio-inspired flattened airfoils, observe their aerodynamic characteristics, and analyse their applicability to small devices or to designs of high-speed trains, within the shortest period in the conceptual stage. A research specimen of a kingfisher, selected for biomimicry, was examined with the following methods: visual inspection, analysis of photographs, manufacturing quality control measurement with a 3D laser scanner, and microscopy. A basic multi-arc-line profile, re-engineered from the overlapped specimen shape data and based on the observations, was used for designing a series of seven derived airfoils. The aerodynamic characteristics of the bio-inspired airfoils were obtained with the panel methods at low and moderate subsonic speeds, while the small transonic difference method was used in the high-subsonic speed range. Basic and ellipse-like airfoils produce higher total drag at low and moderate velocities and higher forebody drag in the high-subsonic range when compared to derived and parabola-like airfoils. The obtained critical Mach numbers are in the range from 0.76 to 0.78, where three bionic airfoils show values equal to or smaller than the values of ellipse- and parabola-like airfoils. The profile with the shortest bio-inspired relative chord has a higher critical Mach number value than the parabola-like profile. The sonic lines above these profiles appear at close positions. The applied set of examination methods of the bio-inspired design is not time consuming and produces sufficiently good results in the conceptual stage. Therefore, a further development of unique and adjusted numerical methods and codes at pre-computational fluid dynamics run is encouraged, together with shape parameterization.",
publisher = "Springer Nature Switzerland AG 2020",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage",
volume = "43",
number = "1",
pages = "57",
doi = "10.1007/s40430-020-02789-2"
}

Linić, S., Lučanin, V. J., Živković, S. P., Raković, M., Ristić, S. S., Radojković, B.,& Polić, S. R.. (2021). Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage. in Journal of the Brazilian Society of Mechanical Sciences and Engineering
Springer Nature Switzerland AG 2020., 43(1), 57.
https://doi.org/10.1007/s40430-020-02789-2

Linić S, Lučanin VJ, Živković SP, Raković M, Ristić SS, Radojković B, Polić SR. Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2021;43(1):57.
doi:10.1007/s40430-020-02789-2 .

Linić, Suzana, Lučanin, Vojkan J., Živković, Srđan P., Raković, Marko, Ristić, Slavica S., Radojković, Bojana, Polić, Suzana R., "Multidisciplinary research method for designing and selection of bio-inspired profiles in the conceptual designing stage" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 43, no. 1 (2021):57,
https://doi.org/10.1007/s40430-020-02789-2 . .

TY  - JOUR
AU  - Linić, Suzana
AU  - Ocokoljić, Goran J.
AU  - Ristić, Slavica S.
AU  - Lučanin, Vojkan J.
AU  - Kozić, Mirko S.
AU  - Rašuo, Boško
AU  - Jegdić, Bore
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2309
AB  - Methods of diagnosing aerodynamic characteristics are constantly developing in order to conduct the precise and energy efficient wind tunnel testing of transport vehicles in the prototype design early stages. This is of a special importance when facing the time/cost consumption problems of detection of the transition zone over the simplified design of the high-speed train. Herein the applied thermodynamics found a very significant role in the field of experimental aerodynamics. With the intention of detecting the boundary-layer transition zone the following measurements were applied: the infrared thermography, flow visualization, and drag force measurements. In addition, the CFD was applied to predict the flow behaviour and transition zone, solving PDE consisting of the Reynolds-averaged Navier-Stokes equations, energy equation, and the equation of state for an ideal gas employing density-based solver. The thermal imaging defined the transition zone by simple application, and fast recognition, while the transition bounds were defined in the analysis. The flow visualization confirmed thermography results and the method itself as favourable, especially in the most expensive early phases of redesigning for aerodynamically optimized and energy efficient solutions. The numerical method was confirmed by the experiments, resulting in acceptable differences in the definition of the transition zone. For a better understanding of the phenomenon, the overlapped implementation of the presented methods focused on forced convection showed as the best solution. Based on the experiences of this research, development of the additional equipment and adjustments will be introduced in the future experiments.
PB  - Belgrade : VINČA Institute of Nuclear Sciences
T2  - Thermal Science
T1  - Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test
VL  - 22
IS  - 2
SP  - 1137
EP  - 1148
DO  - 10.2298/TSCI170619302L
ER  - 

@article{
author = "Linić, Suzana and Ocokoljić, Goran J. and Ristić, Slavica S. and Lučanin, Vojkan J. and Kozić, Mirko S. and Rašuo, Boško and Jegdić, Bore",
year = "2018",
abstract = "Methods of diagnosing aerodynamic characteristics are constantly developing in order to conduct the precise and energy efficient wind tunnel testing of transport vehicles in the prototype design early stages. This is of a special importance when facing the time/cost consumption problems of detection of the transition zone over the simplified design of the high-speed train. Herein the applied thermodynamics found a very significant role in the field of experimental aerodynamics. With the intention of detecting the boundary-layer transition zone the following measurements were applied: the infrared thermography, flow visualization, and drag force measurements. In addition, the CFD was applied to predict the flow behaviour and transition zone, solving PDE consisting of the Reynolds-averaged Navier-Stokes equations, energy equation, and the equation of state for an ideal gas employing density-based solver. The thermal imaging defined the transition zone by simple application, and fast recognition, while the transition bounds were defined in the analysis. The flow visualization confirmed thermography results and the method itself as favourable, especially in the most expensive early phases of redesigning for aerodynamically optimized and energy efficient solutions. The numerical method was confirmed by the experiments, resulting in acceptable differences in the definition of the transition zone. For a better understanding of the phenomenon, the overlapped implementation of the presented methods focused on forced convection showed as the best solution. Based on the experiences of this research, development of the additional equipment and adjustments will be introduced in the future experiments.",
publisher = "Belgrade : VINČA Institute of Nuclear Sciences",
journal = "Thermal Science",
title = "Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test",
volume = "22",
number = "2",
pages = "1137-1148",
doi = "10.2298/TSCI170619302L"
}

Linić, S., Ocokoljić, G. J., Ristić, S. S., Lučanin, V. J., Kozić, M. S., Rašuo, B.,& Jegdić, B.. (2018). Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test. in Thermal Science
Belgrade : VINČA Institute of Nuclear Sciences., 22(2), 1137-1148.
https://doi.org/10.2298/TSCI170619302L

Linić S, Ocokoljić GJ, Ristić SS, Lučanin VJ, Kozić MS, Rašuo B, Jegdić B. Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test. in Thermal Science. 2018;22(2):1137-1148.
doi:10.2298/TSCI170619302L .

Linić, Suzana, Ocokoljić, Goran J., Ristić, Slavica S., Lučanin, Vojkan J., Kozić, Mirko S., Rašuo, Boško, Jegdić, Bore, "Boundary-layer transition detection by thermography and numerical method around bionic train model in wind tunnel test" in Thermal Science, 22, no. 2 (2018):1137-1148,
https://doi.org/10.2298/TSCI170619302L . .

TY  - JOUR
AU  - Vencl, Aleksandar
AU  - Bobić, Biljana
AU  - Vučetić, Filip
AU  - Svoboda, Petr
AU  - Popović, Vladimir
AU  - Bobić, Ilija
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2370
AB  - Nanocomposites were synthesized via compocasting using Zn25Al3Si and Zn25Al3Si0.03Sr alloys as the matrices and nanoparticles of Al2O3 (1 wt%) as the reinforcement. Structure of the nanocomposites was examined, and their basic mechanical and tribological properties were tested. Distribution of primary silicon particles in the structure of nanocomposites has been improved compared to their distribution in the Zn25Al3Si matrix alloy due to the presence of Al2O3 nanoparticles and strontium. The primary silicon particles in the structure of the nanocomposites were found to be more fine-grained compared to the same particles in the structure of the as-cast Zn25Al3Si alloy. Tested mechanical properties of the nanocomposite with Zn25Al3Si alloy matrix are improved, compared to the matrix alloy. The nanocomposite with Zn25Al3Si0.03Sr alloy matrix is characterized with slightly higher value of compressive yield strength and a slightly lower hardness value compared to the as-cast Zn25Al3Si alloy. Both nanocomposites showed lower wear rate and higher coefficient of friction, compared to the matrix alloy, in sliding under the boundary lubricating regime. However, the nanocomposite with Zn25Al3Si alloy matrix showed better tribological properties than the nanocomposite with Zn25Al3Si0.03Sr alloy matrix.
PB  - Springer Heidelberg, Heidelberg
T2  - Journal of the Brazilian Society of Mechanical Sciences and Engineering
T1  - Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy
VL  - 40
IS  - 11
DO  - 10.1007/s40430-018-1441-9
ER  - 

@article{
author = "Vencl, Aleksandar and Bobić, Biljana and Vučetić, Filip and Svoboda, Petr and Popović, Vladimir and Bobić, Ilija",
year = "2018",
abstract = "Nanocomposites were synthesized via compocasting using Zn25Al3Si and Zn25Al3Si0.03Sr alloys as the matrices and nanoparticles of Al2O3 (1 wt%) as the reinforcement. Structure of the nanocomposites was examined, and their basic mechanical and tribological properties were tested. Distribution of primary silicon particles in the structure of nanocomposites has been improved compared to their distribution in the Zn25Al3Si matrix alloy due to the presence of Al2O3 nanoparticles and strontium. The primary silicon particles in the structure of the nanocomposites were found to be more fine-grained compared to the same particles in the structure of the as-cast Zn25Al3Si alloy. Tested mechanical properties of the nanocomposite with Zn25Al3Si alloy matrix are improved, compared to the matrix alloy. The nanocomposite with Zn25Al3Si0.03Sr alloy matrix is characterized with slightly higher value of compressive yield strength and a slightly lower hardness value compared to the as-cast Zn25Al3Si alloy. Both nanocomposites showed lower wear rate and higher coefficient of friction, compared to the matrix alloy, in sliding under the boundary lubricating regime. However, the nanocomposite with Zn25Al3Si alloy matrix showed better tribological properties than the nanocomposite with Zn25Al3Si0.03Sr alloy matrix.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Journal of the Brazilian Society of Mechanical Sciences and Engineering",
title = "Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy",
volume = "40",
number = "11",
doi = "10.1007/s40430-018-1441-9"
}

Vencl, A., Bobić, B., Vučetić, F., Svoboda, P., Popović, V.,& Bobić, I.. (2018). Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy. in Journal of the Brazilian Society of Mechanical Sciences and Engineering
Springer Heidelberg, Heidelberg., 40(11).
https://doi.org/10.1007/s40430-018-1441-9

Vencl A, Bobić B, Vučetić F, Svoboda P, Popović V, Bobić I. Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy. in Journal of the Brazilian Society of Mechanical Sciences and Engineering. 2018;40(11).
doi:10.1007/s40430-018-1441-9 .

Vencl, Aleksandar, Bobić, Biljana, Vučetić, Filip, Svoboda, Petr, Popović, Vladimir, Bobić, Ilija, "Effect of Al2O3 nanoparticles and strontium addition on structural, mechanical and tribological properties of Zn25Al3Si alloy" in Journal of the Brazilian Society of Mechanical Sciences and Engineering, 40, no. 11 (2018),
https://doi.org/10.1007/s40430-018-1441-9 . .