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Article
Digital Flow Rate Measurement System Design for Minichannel based on Cross Correlation Technique

Authors: H.A. Dhahad --- E.M. Alfayydh --- K.H. Fahem
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 7 Part (A) Engineering Pages: 756-763
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this paper, a demonstration for an experimental study to measure mean fluid velocity in minichannels is presented. Fluid flow velocity was estimated by applying cross correlation technique on measured thermal fluctuation using two ultra-small thermistors in every channel. These experiments were conducted on two flow field plates (single serpentine and parallel Z-type arrangement) with dimensions (L*W*H= 75*70*3


Article
Effect of Aluminum Oxide Nanoparticles Fuel Additives on the Performance and Emissions of Diesel Engine

Authors: H.A. Dhahad --- A.S. Hamadi --- S.A. Ali
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 9 Part (A) Engineering Pages: 956-960
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

The effect of Aluminum Oxide (AL2O3) nanoparticles fuel additives on the performance and emission characteristics of diesel engine was investigates. Diesel fuel was mixed with the (AL2O3) nanoparticles in the mass fractions of 100 and 150 ppm by using ultrasonicator. Direct injection (DI), by using fiat diesel engine that run at fixed speed (1500 rpm) and constant fuel injection pressure (400 bar) with varying the operation load. The gain result was likening with those obtain when the operation the diesel engine with normal fuel. Measurements indicated that there is enhancement in the thermal efficiency and the brake specific fuel consumption with increasing the dosing level of (AL2O3) nanoparticles in the blended fuel. The emission results at all loads showed that NOx and smoke produced by (AL2O3) blended fuels were less than those produced by diesel fuel. Diesel fuel produced CO and HC more than (AL2O3) blended fuels at high load and less at low load.

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