7 results for “return stroke”

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Research ArticleOpen accessPhrase in the titleThe Horizontal Electric Field Induced by a Lightning Return StrokeScott L. Meredith, Susan K. Earles, Niescja E. TurnerProblem statement: Develop a new formula which describes the horizontal electric field induced by a lightning return stroke in contact with an imperfect conductive surface. Approach: A new method for describing the horizontal electric field induced by a lightning return stroke will be presented. The method presented here had utilized an approach which purposely downplayed the physics of how image … …Journal of Mathematics and Statistics, Vol. 6, Issue 3 · 30 Sep 2010 · 7,416 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleThe Return-Stroke of Lightning Current, Source of Electromagnetic Fields (Study, Analysis and Modelling)Dib Djalel, Haddouche Ali, Chemam FayçalIn this study we present and analysis of the return-stroke lightning current and described their models which existing in the literature by several authors for the evaluation of radiated electromagnetic fields and modelling the coupling with electrical systems based on the calculation of induced voltages. The objective of this work is to take part in the improvement of the coordination … …American Journal of Applied Sciences, Vol. 4, Issue 1 · 30 Apr 2007 · 7,546 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleThe Effect of Spring Design as Return Cycle of Two Stroke Spark Ignition Linear Engine on the Combustion Process and PerformanceA. Z.M. Fathallah, R. A. BakarProblem statements: The effects of optimization on spring design of the linear engine with spring mechanism in its performance and combustion process have been examined. However, at certain conditions the engine can not work properly as predicted. This can happen because displacement of engine stroke is depending on thrust forces of combustion process in cylinder of the engine. For that, … …American Journal of Engineering and Applied Sciences, Vol. 3, Issue 2 · 30 Jun 2010 · 7,512 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsSTUDY OF THE LIGHTNING IMPACT ON THE WIND-TURBINEDib Djalel, Guebla Abdallah, Labar HocineGenerally, lightning damage has mainly been to home appliances and telephones, Towers and power transmission and generation equipment mal functions and damage due to strikes on power lines. With the adoption of wind power generation equipment, however, lightning damage is also increasing in this area. Through his dimensional characteristics and the wind power system is more exposed in the nature … …Energy Research Journal, Vol. 5, Issue 1 · 16 Oct 2014 · 7,045 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsNew Approach of Electromagnetic Fields of the Lightning DischargeDib Djalel, Mordjaoui Mourad, Hocine LabarDespite the significant developments in the protection means of electrical and electronic systems against the lightning and its effects. With its unpredictability and aggress if character, the lightning is the most dangerous phenomenon for electrical systems, which requires more interest and greater effort by researchers and designers means of protection. We present in this study a new analytic model of … …American Journal of Engineering and Applied Sciences, Vol. 6, Issue 4 · 18 Jan 2014 · 6,912 accessesView PDF Cite

Research ArticleOpen accessIn the abstractPrediction Studies for the Performance of a Single Cylinder High Speed Spark Ignition Linier Engine with Spring Mechanism as Return CycleA.Z.M. Fathallah, R.A. BakarProblem statement: Most concepts of linear engines were constructed as opposed pistons with complicated control devise to drive the engines. The advantage of the engines was their high overall efficiency. Approach: Although the efficiency was higher than conventional engine, however, it did not be applied yet, because the design of these engines was not only difficult to fabricate, but also … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 4 · 31 Dec 2009 · 7,302 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordMOTIONS STUDY OF A SINGLE CYLINDER HIGH SPEED SPARK IGNITION LINIER ENGINE WITH SPRING SYSTEM AS RETURN CYCLEA. Z.M. Fathallah, Semin, I. M. Ariana, I. GeriantoA single cylinder two stroke spark ignition conventional engine have been modified to linier engine with spring mechanism. Before develop the design of linear engine is necessary to analysis of motion. Although principle of combustion process in combustion chamber is the same in fact the oscillation movement is different. Simulation technique has been adopted to study both linear and conventional … …American Journal of Applied Sciences, Vol. 11, Issue 3 · 17 Jan 2014 · 7,179 accessesView PDF Cite