- TITLE:
FEATURES OF DETERMINING THE CONVERSION OF ENERGY IN HYDRAULIC SYSTEMS
- AUTHOR(S):
D. Kostiuk, I. Nochnichenko, A. Murashchenko, O. Jakhno
- ABSTRACT:
The analysis of the processes of transformation of kinetic energy in various types of devices providing both stabilizations of the flow and partial damping of energy is carried out. In the analysis, the features of the flow of a viscous fluid in diffusers, pulsation dampers, and shock absorbers are considered. In addition, it has been shown that for electrically conductive liquids, the transverse magnetic field method can be used. The materials of the analysis can be used to describe energy transport phenomena in liquids.
- DOI:
https://http//doi.org/10.62853/QBYO6474
- PAGES:
21-23
- DOWNLOAD:
FEATURES OF DETERMINING THE CONVERSION OF ENERGY IN HYDRAULIC SYSTEMS
- HOW TO CITE THIS ARTICLE:
Kostiuk D., Nochnichenko I., Murashchenko A., Jakhno O. Features of determining the conversion of energy in hydraulic systems. Journal of the Technical University of Gabrovo 65 (2022) 21-23
- TITLE:
TRANSFER PHENOMENA IN ECOLOGICAL SYSTEMS
- AUTHOR(S):
O. Jakhno, R. Gnativ, I. Nochnichenko
- ABSTRACT:
The phenomenon of transfer finds great application in the problems of hydromechanics of heat and mass transfer associated with structural features and rheological properties of liquid media. A wide distribution of problem solving on the use of ideas about the phenomena of transfer was found in the physicochemical processes of biological media, the processes of transfer of mechanical media, phenomena associated with systems. The article considers cases of solving hydrodynamic problems using the analysis of transport processes for different types of channel flows described by non-stabilized pulsating flow equations, as well as open channel flows that find their place in practice.
- DOI:
https://doi.org/10.62853/EERP5493
- PAGES:
17-20
- DOWNLOAD:
TRANSFER PHENOMENA IN ECOLOGICAL SYSTEMS
- HOW TO CITE THIS ARTICLE:
Jakhno O., Gnativ R., Nochnichenko I. Transfer phenomena in ecological systems. Journal of the Technical University of Gabrovo 65 (2022) 17-20
- TITLE:
INVESTIGATION OF HARDNESS AND ELASTIC MODULUS OF MILLED AND SLM Ti6Al4V ALLOY
- AUTHOR(S):
Ts. Dikova, Vl. Dunchev, Y. Gagov
- ABSTRACT:
The aim of the present paper is to investigate the hardness and elastic modulus of Ti6Al4V alloy produced by CAD/CAM milling and selective laser melting. The Vickers micro-hardness is measured, while the modulus of elasticity is determined by new developed methodology consisting of bending test and finite element analysis. It was established that the manufacturing method lead to differences in the micro-hardness and elastic modulus of the milled and SLM samples. The measured micro-hardness of the Ti6Al4V alloy was higher for the SLM samples (396 HV) compared to the milled ones (347 HV). The values of the modulus of elasticity of Ti6Al4V alloy are 180 GPa for the milled and 120 GPa for the SLM fabricated samples. They are higher than the data given in the literature or by the manufacturers. Subsequent heat treatment with porcelain firing modes slightly decreased the micro-hardness to 322 HV for the milled and 388 HV for the SLM produced samples and had almost no effect on the modulus of elasticity for both groups.
- DOI:
https://doi.org/10.62853/ZECM7737
- PAGES:
11-16
- DOWNLOAD:
INVESTIGATION OF HARDNESS AND ELASTIC MODULUS OF MILLED AND SLM Ti6Al4V ALLOY
- HOW TO CITE THIS ARTICLE:
Dikova Ts., Dunchev Vl., Gagov Y. Investigation of hardness and elastic modulus of milled and SLM Ti6Al4V alloy. Journal of the Technical University of Gabrovo 65 (2022) 11-16
- TITLE:
SEARCH OF MULTIFUNCTIONAL VEHICLES USING THE VENN DIAGRAM AND MORPHOLOGICAL ANALYSIS
- AUTHOR(S):
Y. Kuznetsov
- ABSTRACT:
The article is devoted to one of the directions of the search for technical ideas in the methodology of scientific and technical creativity on the example of the creation of multifunctional vehicles on land, water and in the air using a system-morphological approach and a three-level Venn diagram. Consider interesting examples for movement in non-standard situations. The proposed considerations can be useful for students, graduate students and engineering and technical workers when searching for creative and innovative ideas in various branches of the national economy.
- DOI:
https://doi.org/10.62853/GQPB9330
- PAGES:
08-10
- DOWNLOAD:
SEARCH OF MULTIFUNCTIONAL VEHICLES USING THE VENN DIAGRAM AND MORPHOLOGICAL ANALYSIS
- HOW TO CITE THIS ARTICLE:
Kuznetsov Y. Search of multifunctional vehicles using the Venn diagram and morphological analysis. Journal of the Technical University of Gabrovo 65 (2022) 8-10
- TITLE:
STRUCTURAL - MORPHOLOGICAL SYNTHESIS OFPARALLEL KINEMATICS-BASED HYBRID 3D-PRINTER AND CONNECTION WITH THE CHALLENGES OF INDUSTRY 4.0
- AUTHOR(S):
Y. Kuznietsov, O. Solntsev
- ABSTRACT:
This article highlights the application of a systematic method, a structural - morphological approach to the synthesis of new technical solutions in the field of additive technologies to meet the challenges of Industry 4.0, namely the synthesis of a hybrid, fully automated 3D printer with parallel kinematic structures.
- DOI:
https://doi.org/10.62853/ISOC8142
- PAGES:
03-07
- DOWNLOAD:
STRUCTURAL - MORPHOLOGICAL SYNTHESIS OFPARALLEL KINEMATICS-BASED HYBRID 3D-PRINTER AND CONNECTION WITH THE CHALLENGES OF INDUSTRY 4.0
- HOW TO CITE THIS ARTICLE:
Kuznietsov Y., Solntsev O. Structural � morphological synthesis of parallel kinematics-based hybrid 3d-printer and connection with the challenges of Industry 4.0. Journal of the Technical University of Gabrovo 65 (2022) 3-7
