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RISS 인기검색어
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- 저자 : Khelifa Hocine (검색결과 2 건)
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FE Simulation and Experiment of a Self-Excited SynRel Generator Based on COMSOL Software
Khelifa Hocine,Bentounsi Ammar,Rebahi Fares,Machmoum Mohamed 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.2
This paper presents the performance of a self-excited synchronous reluctance generator with fl ux barriers rotor (transversally laminated) in standalone operation mode. This type of generator’s growing interest is due to its multiple advantages (rugged structure, reliability, and low cost), which allows it to compete with conventional generators in some applications related to renewable energies. The proposed study is carried out in several steps: (i) presentation of designed low power SynRM prototype, (ii) fi nite element modeling (FEM) and simulation of self-excitation process based on COMSOL Multiphysics, (iii) analytical simulations performed with MATLAB/Simulink software based on a d-q model where the dq-inductances are identifi ed experimentally, (iv) and experimental tests performed to validate the results of the simulations.
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Treatment of Collapsible Soils by Additions of Granulated Slag and Natural Pozzolan
Hocine Ziani,Khelifa Abbèche,Ibrahim Messaoudene,L. J. Andrade Pais 대한토목학회 2019 KSCE Journal of Civil Engineering Vol.23 No.3
The study of collapsible soils, due to flooding, is a major problem in soil mechanics. The majority of researches carried out regarding this type of soil have been devoted to their identification, collapse mechanisms and treatments using salts, hydraulic binders and glass fibers. However, little research has been reported on their improvements using industrial waste (e.g., slag) or natural materials (e.g., pozzolan) in order to meet environmental and socio-economic challenges. In this work, a series of tests were conducted to examine the effect of adding granulated slag and natural pozzolan, at different contents, on the suction and the collapse potential (Cp) of a soil reconstituted in the laboratory, and having a behavior similar to natural and undisturbed soils. The obtained results showed clearly that treated collapsible soils with granulated slag and natural pozzolan, lead to a significant reduction in the collapse potential (Cp) followed by a decrease of suction. Furthermore, SEM/EDAX analysis conducted on the same samples revealed that the soil pores were filled with these two materials particles and as a result a significant improvement of the physical andmechanical characteristics of the soil was noted.
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