The Experts below are selected from a list of 15486 Experts worldwide ranked by ideXlab platform
Brian Rothwell - One of the best experts on this subject based on the ideXlab platform.
-
investigation of the Effects of pipe wall roughness and pipe diameter on the decompression wave speed in natural gas pipelines
2012 9th International Pipeline Conference, 2012Co-Authors: Guillaume Michal, Alhoush Elshahomi, Ajit R Godbole, Phillip Venton, Kamal K Botros, Leigh Fletcher, Brian RothwellAbstract:The shock tube experimental results have shown clearly that the decompression wave was slowed down in a pipe with a rough inner surface relative to that in a smooth pipe under comparable conditions. In the present paper a one-dimensional dynamic simulation model, named EPDECOM, was developed to investigate the Effects of pipe wall roughness and pipe diameter on the decompression wave speed. Comparison with experimental results showed that the inclusion of Frictional Effects led to a better prediction than that of the widely used model implemented in GASDECOM. EPDECOM simulation results showed that the Effect of roughness on the decompression wave speed is significant for pipe diameters less than 250 mm. However the decompression wave speed is nearly independent of the roughness for diameters above 250 mm as the Frictional Effect becomes negligible at such diameters.Copyright © 2012 by ASME
Guillaume Michal - One of the best experts on this subject based on the ideXlab platform.
-
investigation of the Effects of pipe wall roughness and pipe diameter on the decompression wave speed in natural gas pipelines
2012 9th International Pipeline Conference, 2012Co-Authors: Guillaume Michal, Alhoush Elshahomi, Ajit R Godbole, Phillip Venton, Kamal K Botros, Leigh Fletcher, Brian RothwellAbstract:The shock tube experimental results have shown clearly that the decompression wave was slowed down in a pipe with a rough inner surface relative to that in a smooth pipe under comparable conditions. In the present paper a one-dimensional dynamic simulation model, named EPDECOM, was developed to investigate the Effects of pipe wall roughness and pipe diameter on the decompression wave speed. Comparison with experimental results showed that the inclusion of Frictional Effects led to a better prediction than that of the widely used model implemented in GASDECOM. EPDECOM simulation results showed that the Effect of roughness on the decompression wave speed is significant for pipe diameters less than 250 mm. However the decompression wave speed is nearly independent of the roughness for diameters above 250 mm as the Frictional Effect becomes negligible at such diameters.Copyright © 2012 by ASME
I M Monirul - One of the best experts on this subject based on the ideXlab platform.
-
optimization of performance emission friction and wear characteristics of palm and calophyllum inophyllum biodiesel blends
Energy Conversion and Management, 2016Co-Authors: M H Mosarof, M A Kalam, H H Masjuki, Abdullah Alabdulkarem, A Arslan, A M Ashraful, H K Rashedul, I M MonirulAbstract:Abstract A running automobile engine produces more friction and wear between its sliding components than an idle one, and thus requires lubrication to reduce this Frictional Effect. Biodiesel is an alternative diesel fuel that is produced from renewable resources. Energy studies conducted over the last two decades focused on solutions to problems of rising fossil fuel price, increasing dependency on foreign energy sources, and worsening environmental concerns. Palm oil biodiesel is mostly used in Malaysia. This study conducted engine performance and emission tests with a single-cylinder diesel engine fueled with palm and Calophyllum inophyllum biodiesel blends (PB10, PB20, PB30, CIB10, CIB20, and CIB30) at a full-load engine speed range of 1000–2400 rpm, and then compared the results with those of diesel fuel. Friction and wear tests were conducted using the four-ball tester with different temperatures at 40 and 80 kg load conditions and a constant speed of 1800 rpm. The average brake specific fuel consumption increased from 7.96% to 10.15% while operating on 10%, 20%, and 30% blends of palm and C. inophyllum biodiesel. The respective average brake powers for PB20 and PB30 were 9.31% and 12.93% lower compared with that for diesel fuel. PB20 produced relatively lower CO and HC emissions than the diesel and biodiesel blends. Diesel produced low amounts of NO X emission, and the CIB blend produced a lower Frictional coefficient compared with the diesel and PB blends. PB30 showed high average FTP and low average WSD, both of which enhanced lubricating performance. An average metal element composition was found in PB20 under the 40 and 80 kg load conditions. PB20 showed lower worn scar surface areas compared with the diesel and biodiesel blends. Results indicated that PB20 has better engine performance, lower emission, and good lubrication properties compared with diesel and biodiesel blends. Thus, PB20 is suitable for use in diesel engines without the need for any engine modification.
-
assessment of friction and wear characteristics of calophyllum inophyllum and palm biodiesel
Industrial Crops and Products, 2016Co-Authors: M H Mosarof, M A Kalam, H H Masjuki, Abdullah Alabdulkarem, M Habibullah, A Arslan, I M MonirulAbstract:Abstract When an automobile engine is running it produces more friction and wear between the sliding components and lubrication is required for reducing the Frictional Effect. Friction and wear reduce engine life, reliability and increase the maintenance cost. This study investigated and compared the friction and wear characteristics of diesel, Calophyllum inophyllum , palm biodiesel, and their blends, by using the four-ball tester. The experimental test was conducted at 30 °C, 45 °C, 60 °C and 75 °C, under 40 kg and 80 kg loads, at a constant speed of 1800 rpm for all samples. The average coefficient of friction of diesel was 28.8% and 23.4% higher than pure C. inophyllum and palm biodiesel respectively. The wear scar diameter of diesel was higher than biodiesel and biodiesel blends at different temperatures and loads. The highest amount of elements were found from CIB100 (45 ppm), which changes by about 14.6 ppm compared to ordinary oil. PB10 and PB20 have lower amounts of metal composition and oxide formation. PB20 exhibits a lower worn scar surface area than diesel and biodiesel blends. PB20 shows good lubrication performance and the possibility to form highly lubricating film without breaking down over a long time.
Phillip Venton - One of the best experts on this subject based on the ideXlab platform.
-
investigation of the Effects of pipe wall roughness and pipe diameter on the decompression wave speed in natural gas pipelines
2012 9th International Pipeline Conference, 2012Co-Authors: Guillaume Michal, Alhoush Elshahomi, Ajit R Godbole, Phillip Venton, Kamal K Botros, Leigh Fletcher, Brian RothwellAbstract:The shock tube experimental results have shown clearly that the decompression wave was slowed down in a pipe with a rough inner surface relative to that in a smooth pipe under comparable conditions. In the present paper a one-dimensional dynamic simulation model, named EPDECOM, was developed to investigate the Effects of pipe wall roughness and pipe diameter on the decompression wave speed. Comparison with experimental results showed that the inclusion of Frictional Effects led to a better prediction than that of the widely used model implemented in GASDECOM. EPDECOM simulation results showed that the Effect of roughness on the decompression wave speed is significant for pipe diameters less than 250 mm. However the decompression wave speed is nearly independent of the roughness for diameters above 250 mm as the Frictional Effect becomes negligible at such diameters.Copyright © 2012 by ASME
Alhoush Elshahomi - One of the best experts on this subject based on the ideXlab platform.
-
investigation of the Effects of pipe wall roughness and pipe diameter on the decompression wave speed in natural gas pipelines
2012 9th International Pipeline Conference, 2012Co-Authors: Guillaume Michal, Alhoush Elshahomi, Ajit R Godbole, Phillip Venton, Kamal K Botros, Leigh Fletcher, Brian RothwellAbstract:The shock tube experimental results have shown clearly that the decompression wave was slowed down in a pipe with a rough inner surface relative to that in a smooth pipe under comparable conditions. In the present paper a one-dimensional dynamic simulation model, named EPDECOM, was developed to investigate the Effects of pipe wall roughness and pipe diameter on the decompression wave speed. Comparison with experimental results showed that the inclusion of Frictional Effects led to a better prediction than that of the widely used model implemented in GASDECOM. EPDECOM simulation results showed that the Effect of roughness on the decompression wave speed is significant for pipe diameters less than 250 mm. However the decompression wave speed is nearly independent of the roughness for diameters above 250 mm as the Frictional Effect becomes negligible at such diameters.Copyright © 2012 by ASME
