eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
1999-01-01
22
1
1
20
10.21608/erjm.1999.72988
72988
Original Article
General Correlation of Pressure Distribution for Swirl Flow in Pipes
M. H. Embaby
1
Mech, Power Eng. Dept. Faculty of Eng., Menoufia Univ., Egypt.
Early correlations of wall static pressure distribution along pipes, through whicha Newtonian fluid flows with-unguided vane generated-swirl component, havebeen generalized. Generalization includes another - tangential tap generated -swirl type in addition to fluids other than Newtonian. These correlations are ofgreat benefit for many applications provided knowledge of the fluid rheologicalproperties as well as the conventional friction factor correlations. An expressionfor swirl number evaluation has been introduced in order to make use of theavailable correlations. Application on non-Newtomian power law fluids has beencarried out and the correlation represented well the available experimental datafor both laminar and turbulent flow conditions. Application on drag reductionflow, under conditions of maximum drag reduction, has shown that thepercentage drag reduction increases as the pipe length increases, i.e., as the swirlintensity decreases.
https://erjm.journals.ekb.eg/article_72988_d8ee8aaebdaf87ac7a0e15cf26679311.pdf
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
1999-01-01
22
1
21
28
10.21608/erjm.1999.72989
72989
Original Article
A novel speed control technique for single-phase induction motor
A.S. ZEIN EL-DIN
1
A.E. EL-SABBE
2
Department of Electrical Engineering, Faculty of Engineering, Shebin El-Kom, Egypt,
Department of Electrical Engineering, Faculty of Engineering, Shebin El-Kom, Egypt,
In this paper, a novel speed control of a single phase induction motor is proposed using amodified inverter. Three MOSFETs are used for controlling the flux linkage of a singlephase transformer, its secondary winding is connected in series with the motor. On-lineBang-Bang speed control of motor scheme is implemented using a microprocessor to derivethe inverter. A mathematical model for the single-phase induction motor is presented, whichis used to build up a simulation program for a certain desired speed. Experimental resultshave been carried out to investigate the motor performance with the controller. Goodagreement has been obtained between simulation and experimental results.
https://erjm.journals.ekb.eg/article_72989_ecec993a53bcd28cca5cec78dd1655f0.pdf
microprocessor
Flux linkage
MOSFET
Bang-Bang control
and single-phase induction
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
1999-01-01
22
1
29
44
10.21608/erjm.1999.72992
72992
Original Article
Effect Of Geometry Of The Broad Crested Weir On The Dimensions Of The Downstream Apron
Kassem S. El- Alfy
1
Moustafa A. El-Enany
2
Assistant Prof., Dept. of Civil Eng., Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt.
Assistant Prof., Dept. of Civil Eng., Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt.
The objective of this study is to investigate the effect of thegeometry of the broad crested weir, (crest height, crest width,top surface slope, top surface roughness, corners radius, andcrest contraction ratio ), on the predicted apron length (L) anddepth (D).The experimental work has been carried out using a beechmodels placed in an open rectangular flume under differentvalues of discharge. These models are divided to six categoriesto study the effect of the aforementioned parameters. Also, onemodel of cach category is built-up with the experimentalpredicted apron dimensions and reexamined against the D.S.scour at the same conditions.From the experimental results of the present investigation ,itis found that there is a general increase in the apron length
https://erjm.journals.ekb.eg/article_72992_805f37eb23d1f5fe0cc18670d751c4a6.pdf
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
1999-01-01
22
1
45
60
10.21608/erjm.1999.72994
72994
Original Article
OPERATION AND PERFORMANCE OF A SWITCHED RELUCTANCE GENERATOR
M. M. Khater
1
S. M. R. Tahoun
2
Department of Electrical Engineering, Faculty of Engineering, Menoufiya University, Shebin El-Kom,
Department of Electrical Engineering, Faculty of Engineering, Menoufiya University, Shebin El-Kom,
Former studies have been focused on switched reluctance machine as a motor.This paper introduces an analytical and experimental study on a switchedreluctance generator. Two basic operating conditions namely, constant voltagedc source and separately-excited generator with direct load have beenproposed and analytically investigated. An experimental study has been carriedout on the separately-excited condition and good matching has been obtainedbetween measured and corresponding analytical results. Specific characteristicsand suitable applications of this generating system have been discussed.
https://erjm.journals.ekb.eg/article_72994_7420cade40a29d5b1907c8777c50fc76.pdf
Switched reluctance generators
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
1999-01-01
22
1
61
78
10.21608/erjm.1999.72997
72997
Original Article
PARADIGM SHIFT IN REGIONAL AND U AN DEVELOPMENT STUDIES IN THE AGE OF GLOBALIZATION: THE CASE OF DEVELOPING THE SOUTH OF EGYPT
Ahmed o. El-Kholei
1
Associate Professor, Department of Architecture, Faculty of Engineering, Minoufiya University, EGYPT
Developn~ent management of human settlements in developing countries has gained planners' attention. Regional imbalances associate with urban problems including environmental degradation, housing problems, unen~ployment and the like. Different development approaches have experienced limited effectiveness. The philosophical foundation of these approaches and the decision-nlaking process are among the reasons for the limited succcss. Today in the age of globalization, a new mode of capital accunlulation associates with new modalities of thinking. This paper presents the design of the project to articulate a Strategic Plan for the Development of Human Settlements, South of Egypt, using post-modernist p1,uming mode of thinking and a participatory decision-making process. Postmodern planning en~phasizes a combination of instrumental and communicative action directed by cmancipatoly interests where planning is an enlightening social process. It offers a franlework that is suitable for the dynamic nature of contemporary societal transfomiations. Postmodern piamling offers new definitions for old problems thus presenting new solutions that could be adequate in the coming millenium.
https://erjm.journals.ekb.eg/article_72997_448a0df8602b39d0388c19a6cec8b1c7.pdf
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
1999-01-01
22
1
79
92
10.21608/erjm.1999.73002
73002
Original Article
HYBRID OF SOLAR PHOTOVOLTAIC AND WIND ENERGY TO SUPPLY AN ISOLATED LOAD
G. E. M. Aly
1
A. A. El-Zeftawy
2
Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt
Faculty of Engineering, Menoufia University, Shebin El-Kom, Egypt
This work aims to determine the optimal hybrid of an autonomousgeneration system of renewable energy sources (RESS) to supply anisolated load. This system includes solar photovoltaic generators, wind-generators and energy storage units. A technical and economical model isintroduced here to optimize the combined energy of this hybrid system.This model depends on the hourly solar radiation, wind speed and theload demand at the considered site, in addition to the economicalparameters and operational constraints of the aforementioned RESs.The suggested model is applied numerically with the nonlinearprogramming for planning photovoltaic and wind energy systems tosupply an isolated load in remote area of Egypt. Also, the capacity ofenergy storage units to ensure the continuity of the power supply used isdetermined and optimized by a load management technique. Thecombined energy of this hybrid system is optimized from economicalpoint of view.
https://erjm.journals.ekb.eg/article_73002_5da048fefc69d872940a532be7593077.pdf
eng
Menoufia University, Faculty of Engineering
ERJ. Engineering Research Journal
1110-1180
1999-01-01
22
1
93
110
10.21608/erjm.1999.73009
73009
Original Article
غربة المسکن المعاصر
إيمان عيد محمد عطيه
1
قسم الهندسة المعمارية - کلية الهندسة - جامعة المنوفية
يهدف البحث الى:محاولة ايجاد المعايير التصميمية التى يجب أن يترکز عليها المسکن المعاصر حتى يمکنه تلبية کافة الاحتياجات الاجتماعية و الانسانية والوظيفية للاسرة دون المساس بالمقاومات الثقافية والحضارية و البيئية لمجتمعنا فى اطار تکامل بين القيم والمبادئ والعادات والتقاليد والاعراف التى تحکمنا مع تقنيات العصر وصولاً إلى مسکن معاصر يعبر عن مجتمعنا مکانياً وزمانياً حتى يتکون له طابع معمارى يميزة.
https://erjm.journals.ekb.eg/article_73009_b009ca837494f730740034c97dc809dd.pdf