Mechanical & Industrial Engineering: Recent submissions
Now showing items 301-320 of 1396
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Experimental investigations on the performance of a thermo-mechanical refrigeration system utilizing ultra-low temperature waste heat sources
( Elsevier , 2023 , Article)Experimental studies that investigate the utilization of ultra-low temperature (between 48 °C and 120 °C) waste heat, which forms 25 % of the global unrecovered waste heat, to drive thermal cooling systems are rare. Thus, ... -
Experimental study of exhaust emissions and performance of a dual fuel IDI diesel engine
(1999 , Conference Paper)Dual fuel engines of the compression ignition type provide an alternative approach for I.C. engines to improve economy, reduce exhaust emissions and achieve a greater power. The present contribution is an experimental ... -
Abnormal release of toxic gases from natural gas processing plants
( American Society of Mechanical Engineers (ASME) , 2001 , Conference Paper)Qatar, one of the Arabian Gulf States, possesses one of the world's largest non-associated gas fields. Most of the country's development plans are based on the preparation of natural gas for export and local use. Under ... -
Risk assessment of accidental spills of toxic and flammable liquids on land
( Emerald Publishing , 2004 , Master Thesis)The main objective of this paper is the assessment of the environmental impact due to accidental spills of toxic and flammable liquids on land. Different case studies of possible accidents in the State of Qatar were ... -
Environmental impact of fuel spills on land
(2006 , Conference Paper)This study considers the toxicity and flammability of emitted fuel vapor from un-ignited pools of spilled chemicals on land. It also estimates the thermal radiation levels emitted from such pools in case they catch fire. ... -
Baseline formation for damage diagnosis in one dimensional-beam problems
(2002 , Conference Paper)A brief account of the theories behind modal analysis, dimensional analysis, the stereolithography process and the strain energy damage detection method is presented. An integrated system of those techniques is formulated ... -
Solving the inverse problem of crack identification using fuzzy genetic algorithms
(2010 , Conference Paper)Failure due to low-cycle fatigue initiated cracks in rotating equipment may result in catastrophic scenarios. It is, therefore, important to identify fault parameters, such as crack size and crack location, to avoid such ... -
Flow induced vibrations of pressure let-down station in QATARGAS
(2006 , Conference Paper)The use of the pipes to transfer oil and gases from production to export places is a common application in oil and gas industries. The safety and stability of the pipelines are crucial to prevent human and equipment losses. ... -
Centrifugal Compressor Spiral Dry Gas Seal Simulation Working at Reverse Rotation
( Elsevier Ltd , 2013 , Conference Paper)Unidirectional dry gas seal may experiences reverse rotation when equipped in a centrifugal compressor. This paper describes how the reverse rotation effects on the spiral unidirectional dry gas seal performance and pressure ... -
Three Dimensional Computational Study for Spiral Dry Gas Seal with Constant Groove Depth and Different Tapered Grooves
( Elsevier Ltd , 2013 , Conference Paper)The three dimensional simulation for dry gas seal with constant depth spiral grooves and with different taper grooves is done using ANSYS FLUENT CFD code. Grid independence study and code validation are done with experimental ... -
Numerical simulation of stall development into surge and stall control using air injection in centrifugal compressors
( American Society of Mechanical Engineers (ASME) , 2014 , Conference Paper)This study presents a numerical simulation of the formation of rotating stall and the initiation of surge in order to study the connection between stall and surge in centrifugal compressors. Also, the current paper introduces ... -
Optical investigation of a long throated Venturi conveying inert spherical particulate with size range similar to pulverised coal
( Elsevier B.V. , 2011 , Article)This experimental and numerical calculation work demonstrates the behaviour of a two-phase gas-solid Venturi. The type of two-phase flow studied is that encountered in conveying coal to the furnaces in power stations - a ... -
Characterisation of multiphase fluid-structure interaction using non-intrusive optical techniques
(2011 , Article)The purpose of this study is to determine experimentally the effectiveness of passive drag reduction techniques (which involve adjusting surface geometry) within a chaotic multiphase flow system. To quantify the intrusion ... -
Utilization of pulverised coal monitoring system for cleaner electricity generation
( Universiti Malaysia Pahang , 2014 , Article)This paper describes a utilization of the coal monitoring system, which is a clamp-on particle sizer (CPS) device for monitoring particle size at the outlet of a classifier model. The device is examined in terms of its ... -
Numerical investigation of rotating stall characteristics and active stall control in centrifugal compressors
( American Society of Mechanical Engineers (ASME) , 2014 , Conference Paper)This paper focuses on providing better view for the understanding of rotating stall phenomenon in centrifugal compressors by using numerical simulations and presents a study of the role of air injection method in delaying ... -
Numerical simulation and control of rotating stall in a transonic centrifugal compressor
( Web Portal ASME (American Society of Mechanical Engineers) , 2014 , Conference Paper)This study presents a numerical simulation of precursors and characteristics of rotating stall in a centrifugal compressor with vaned diffuser. The aim is to further understand the causes of stall inception, characteristics ... -
Numerical investigation of steady air injection flow to control rotating stall in centrifugal compressors
( Web Portal ASME (American Society of Mechanical Engineers) , 2014 , Conference Paper)This paper concerns the role of air injection method in stabilization and stall control in centrifugal compressors. The main aim is to find the best arrangement of air injection parameters such as injection angle and ... -
Unsteady CFD simulation for high speed centrifugal compressor operating near surge
( American Society of Mechanical Engineers (ASME) , 2014 , Conference Paper)Centrifugal compressor surge and stall are an instabilities flow and system phenomenon, which can lead to a loss of engine power, large pressure transients and, in some cases, failure of the compressor and bearing system. ... -
Numerical simulation of using combined active and passive stall control techniques in centrifugal compressors
( American Society of Mechanical Engineers (ASME) , 2014 , Conference Paper)This study presents a numerical simulation of stall control by using the casing treatment method which represents the passive control technique and also by using the air injection method which represents the active control ... -
Numerical investigation of rotating stall in centrifugal compressor with vaned and vaneless diffuser
( Science Press , 2015 , Article)This study presents a numerical simulation of the stall and surge in a centrifugal compressor and presents a descriptionof the stall development in two different cases. The first case is for a compressor with vaneless ...
