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Rafeq A. Khalefa
Rafeq A. Khalefa
Other namesالاستاذ المساعد رفيق احمد خليفه
Northern Technical University-Iraq
Verified email at ntu.edu.iq
Title
Cited by
Cited by
Year
Hybrid nanofluid to enhance heat transfer under turbulent flow in a flat tube
SE Kaska, RA Khalefa, AM Hussein
Case Studies in Thermal Engineering, 100398, 2019
692019
The effect of using compound techniques (passive and active) on the double pipe heat exchanger performance
HH Hamed, AE Mohammed, RA Khalefa, OA Habeeb, MA Abdulqader
Egyptian Journal of Chemistry 64 (6), 2797-2802, 2021
72021
Experimental Performance Investigation of Domestic Refrigerator Charged by R600a and R134a
MH Khaleel, E Kaska, RA Khalefa
Journal of University of Babylon for Engineering Sciences 26 (9), 26-34, 2018
62018
Performance Enhancement of the Vertical Double Pipe Heat Exchanger by Applying of Bubbling Generation on the Shell Side
HH Habeeb, RA Khalefa, SE Kaska
kirkuk university journal for scientific studies 13 (1), 156-171, 2018
6*2018
Performance of a Small 4-Stroke Single Cylinder Diesel Engine Under Effect of the Friction Losse
RA Khalefa
Internal Journal of Applied Engineering Research 8 (6), 675-687, 2013
22013
The Effect of Using Small Cylindrical Aluminum Pieces as a Packing Material on the Double Pipe Heat Exchanger Performance
SE Kaska, MH Khaleel, RA Khalefa
International Journal of Mechanical Engineering and Technology 9 (13), 1621-1631, 2018
12018
The Effect of Spark Timing on the Spark Ignition Engine Performance
RA Khalefa
Tikrit Journal of Engineering Sciences 18 (2), 62-71, 2011
12011
Performance of a Single Cylinder Direct Injection 4-Stroke Diesel Engine under Effect of Using Diesel and Naphtha Blends
ME Basas, RA Khalefa
Advances in Mechanical and Materials Engineering 40 (1), 181-187, 2023
2023
The Performance of the U Shape Double pipe heat exchanger under effect of using Active Techniques
MF ALbayati, RA Khalefa
NTU Journal of Engineering and Technology 1 (3), 2022
2022
The Performance of the hairpin type U Shape Double pipe heat exchanger type under effect of using Passive and Active Techniques.
MF ALbayati, RA Khalefa
Design Engineering, 6557-6572, 2021
2021
Experimental Investigation of the Hydroxy Gas Generation as a Clean Energy Source for Spark Ignition Engine Operation Using Different Electrolytes
YA Sharif, SS Jasim, RA Khalefa, SJ Taher
Polytechnic Journal 11 (1), 4, 2021
2021
Friction Power Modeling As A Function Of Diesel Engine Speed And Geometry With Predicting Their Effects On Some Performance Parameters
SEK Rafeq A. Khalefa
Thi-Qar University Journal for Engineering Sciences 8 (1), 55-64, 2017
2017
THE EFFECT OF VALVE TIMING ON THE LOW SPEED DIESEL ENGINE PERFORMANCE
HH Hamed, II Yousif, RA Khalefa
Journal of Techniques 30 (1), 2017
2017
SIMULATION OF THE COMPRESSION RATIO EFFECTS ON THE COMBUSTION CHARACTERISTICS AND PERFORMANCE OF A SPARK IGNITION ENGINE
RA Khalefa
Journal of Techniques 30 (6), 2017
2017
EVALUATION OF THE DIESEL ENGINE PERFORMANCE UNDER EFFECT OF DIFFERENT PATTERNS OF THE FUEL INJECTION RATES
RA Khalefa
Journal of Al-Taqani 27 (4), 2014
2014
Simulation of the (Bore/Stroke) Ratio Effects on the Combustion Characteristics and Performance of a Spark Ignition Engine
RA Khalefa
3rd Scientific International Conference-Najaf Technical Collage, 486-502, 2013
2013
Estimating of the Environmental Pollutants and Energy Losses Resulting from the Flaring of the Associated Gas of the Khabaz oil Field
RA Khalefa
The 12th Scientific Conference Foundation of Technical Education 3 (Eng …, 2011
2011
Construction of a mathematic Model for Simulating the Effect of Loads(A/F) on the Duration and Performance of the 4-Stroke Single Cylinder Diesel Engine Type (ANDORIA)
RA Khalefa
The 12th Scientific Conference Foundation of Technical Education 12 (3), 271-281, 2011
2011
Case Studies in Thermal Engineering
KA Pathan, PS Dabeer, SA Khan
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Articles 1–19