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RISS 인기검색어
- 검색키워드
- 저자 : A. E. HASSANEEN (검색결과 2 건)
- 무료
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- 유료
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COMBUSTION INSTABILITIES AND NANOPARTICLES EMISSION FLUCTUATIONS IN GDI SPARK IGNITION ENGINE
A. E. HASSANEEN,S. SAMUEL,I. WHELAN 한국자동차공학회 2011 International journal of automotive technology Vol.12 No.6
The main challenge facing the concept of gasoline direct injection is the unfavourable physical conditions at which the premixed charge is prepared and burned. These conditions include the short time available for gasoline to be sprayed, evaporated, and homogeneously mixed with air. These conditions most probably affect the combustion process and the cycle-by-cycle variation and may be reflected in overall engine operation. The aim of this research is to analyze the combustion characteristics and cycle-by-cycle variation including engine-out nanoparticulates of a turbocharged, gasoline direct injected spark ignition (DISI) engine at a wide range of operating conditions. Gasoline DISI, turbo-intercooled, 1.6L, 4 cylinder engine has been used in the study. In-cylinder pressure has been measured using spark plug mounted piezoelectric transducer along with a PC based data acquisition. A single zone heat release model has been used to analyze the in-cylinder pressure data. The analysis of the combustion characteristics includes the flame development (0-10% burned mass fraction) and rapid burn (10-90% burned mass fraction) durations at different engine conditions. The cycle-by-cycle variations have been characterized by the coefficient of variations (COV) in the peak cylinder pressure, the indicated mean effective pressure (IMEP), burn durations, and particle number density. The combustion characteristics and cyclic variability of the DISI engine are compared with data from throttle body injected (TBI) engine and conclusions are developed.
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Synthesis of pyrido[2,3-d][1,2,4]triazolo[4,3-a]pyrimidin-5-ones as potential antimicrobial agents
Thoraya A. Farghaly,Huwaida M. E. Hassaneen 대한약학회 2013 Archives of Pharmacal Research Vol.36 No.5
Synthesis of new derivatives of pyrido[2,3-d][1,2,4]triazolo[4,3-a]pyrimidin-5-one via reaction of7-(4-bromophenyl)-1,2-dihydro-5-(4-fluorophenyl)-2-thioxopyrido[2,3-d] pyrimidin-4(3H)-one with hydrazonoylchlorides or reaction of 2-hydrazino-pyrido[2,3-d]pyrimidin-4(3H)-one with different aldehydes followed bycyclization of the products. All the newly synthesizedcompounds were evaluated for their antimicrobial activitiesand also their minimum inhibitory concentration againstmost of test organisms was performed. Amongst the testedcompounds displayed excellent activity against all thetested microorganisms except SR and PA.
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