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RISS 인기검색어
- 검색키워드
- 저자 : Saha Ujjwal K. (검색결과 2 건)
- 무료
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Sloshing of liquids in partially filled tanks - a review of experimental investigations
Eswaran, M.,Saha, Ujjwal K. Techno-Press 2011 Ocean systems engineering Vol.1 No.2
Liquid sloshing constitutes a broad class of problems of great practical importance with regard to the safety of liquid transportation systems, such as tank trucks on highways, liquid tank carriages on rail roads, ocean going vessels and propellant tanks in liquid rocket engines. The present work attempts to give a review of some selected experimental investigations carried out during the last couple of decades. This paper highlights the various parameters attributed to the cause of sloshing followed by effects of baffles, tank inclination, magnetic field, tuned liquid dampers, electric field etc. Further, recent developments in the study of sloshing in micro and zero gravity fields have also been reported. In view of this, fifteen research articles have been carefully chosen, and the work reported therein has been addressed and discussed. The key issues and findings have been compared, tabulated and summarized.
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Mondal Prosenjit,Tripathy Praveen,Saha Ujjwal K.,Adda Ravindranath 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.5
The increasing number of nonlinear loads and the integration of renewable energy sources into the grid make the conventional SRF-PLL less accurate for estimating the phase and frequency of the grid voltage. A variety of enhanced fi ltering-based PLLs have been reported in the literature to solve this issue. However, these techniques are computationally more complex. For this reason, a method has been proposed to improve the performance of low pass fi lter (LPF)-based SRF-PLL, which is easy to implement and is computationally less expensive. In this paper, two in-loop second-order notch fi lters have been used with an LPF to nullify the eff ect of dominant lower order harmonics. The dynamic performance of the proposed technique is improved by implementing a PID type loop fi lter. The proposed scheme is compared with the other methods, like MRFPLL, conventional and LPF-based SRF-PLL. The response of the proposed PLL is found to be encouraging under diff erent grid disturbances. The effi cacy of the proposed PLL has been verifi ed by implementing the current controller to control the active and reactive grid current for the grid side converter in the hardware setup.
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