Analysis of Flow Characteristics In Inlet And Exhaust Manifolds of Experimental Gasoline Combustion In A VCR Engine

J Kutaiba, Al-Khishali, Mahmoud Mashkour, Shamil Ehsan, Omaraa
2010 Eng. & Tech. Journal   unpublished
In the present work, an approach to estimate of flow characteristic in inlet and exhaust manifolds of internal combustion engines is performed using a four-stroke variable compression ratio single cylinder gasoline engine. In the theoretical part a computer simulations of the flow field in the intake and exhaust systems as well as the cylinder cavity for the experimental data obtained in the gas exchange cycle program using the method of characteristics for the engine dimensions and timings
more » ... in the experimental study as well as the data obtained from the gas exchange cycle program for the sake of comparison and presentation of flow characteristic. In the experimental work, the compression ratio was varied from 7 to 11 at variable speed with constant throttle opening, where engine performance was obtained. Results of engine performance as well as pressure, temperature and velocity fields in the intake and exhaust systems obtained by the gas exchange cycle program using the method of characteristics are presented. Keywords: Internal combustion engine, flow field in pipes, method of characteristic ‫ﻤﺘﻐﻴﺭﺓ‬ ‫ﺍﻨﻀﻐﺎﻁ‬ ‫ﻨﺴﺒﺔ‬ ‫ﺫﻭ‬ ‫ﻟﻤﺤﺭﻙ‬ ‫ﺍﻟﺤﺭﻴﺎﻥ‬ ‫ﺨﺼﺎﺌﺹ‬ ‫ﺘﺤﻠﻴل‬ ‫ﺍﻟﺨﻼﺼﺔ‬ ‫ﻟﻤﺤﺭﻜﺎﺕ‬ ‫ﻭﺍﻟﻌﺎﺩﻡ‬ ‫ﺍﻟﺴﺤﺏ‬ ‫ﻗﻨﻭﺍﺕ‬ ‫ﻓﻲ‬ ‫ﺍﻟﺠﺭﻴﺎﻥ‬ ‫ﺨﻭﺍﺹ‬ ‫ﺤﺴﺎﺏ‬ ‫ﺍﻟﺤﺎﻟﻲ‬ ‫ﺍﻟﺒﺤﺙ‬ ‫ﻴﺘﻀﻤﻥ‬ ‫ﺍﻨﻀﻐﺎﻁ‬ ‫ﺒﻨﺴﺒﺔ‬ ‫ﻭﺍﺤﺩﺓ‬ ‫ﺃﺴﻁﻭﺍﻨﺔ‬ ‫ﺫﻭ‬ ‫ﺍﻷﺸﻭﺍﻁ‬ ‫ﺭﺒﺎﻋﻲ‬ ‫ﻤﺤﺭﻙ‬ ‫ﺒﺎﺴﺘﺨﺩﺍﻡ‬ ‫ﺘﺠﺭﻴﺒﻴﺎ‬ ‫ﻨﻔﺫ‬ ‫ﺍﻟﺩﺍﺨﻠﻲ‬ ‫ﺍﻻﺤﺘﺭﺍﻕ‬ ‫ﺍﻟﺒﻨﺯﻴﻥ‬ ‫ﺒﻭﻗﻭﺩ‬ ‫ﻴﻌﻤل‬ ‫ﻤﺘﻐﻴﺭﺓ‬. ‫ﺘ‬ ‫ﺍﻟﻨﻅﺭﻱ‬ ‫ﺍﻟﺠﺎﻨﺏ‬ ‫ﻓﻲ‬ ‫ﺘﺠﻭﻴﻑ‬ ‫ﻭﻜﺫﻟﻙ‬ ‫ﻭﺍﻟﻌﺎﺩﻡ‬ ‫ﺍﻟﺴﺤﺏ‬ ‫ﻟﻨﻅﺎﻡ‬ ‫ﻟﻠﺠﺭﻴﺎﻥ‬ ‫ﺒﺎﻟﺤﺎﺴﺒﺔ‬ ‫ﻤﺤﺎﻜﺎﺓ‬ ‫ﻋﻤل‬ ‫ﻡ‬ ‫ﻋﻠﻰ‬ ‫ﺒﺎﻻﻋﺘﻤﺎﺩ‬ ‫ﺍﻟﺨﺼﺎﺌﺹ‬ ‫ﻁﺭﻴﻘﺔ‬ ‫ﺒﺎﺴﺘﺨﺩﺍﻡ‬ ‫ﺍﻟﻐﺎﺯﻱ‬ ‫ﺍﻟﺘﺒﺎﺩل‬ ‫ﺩﻭﺭﺓ‬ ‫ﺒﺭﻨﺎﻤﺞ‬ ‫ﺒﻭﺍﺴﻁﺔ‬ ‫ﺍﻻﺴﻁﻭﺍﻨﺔ‬ ‫ﺍﻟﺩﺭﺍﺴﺔ‬ ‫ﻓﻲ‬ ‫ﺍﻟﻤﺴﺘﻌﻤﻠﺔ‬ ‫ﺍﻟﻤﺤﺭﻙ‬ ‫ﻭﺘﻭﻗﻴﺘﺎﺕ‬ ‫ﻹﺒﻌﺎﺩ‬ ‫ﻭﻓﻘﺂ‬ ‫ﺍﻟﻌﻤﻠﻲ‬ ‫ﺠﺎﻨﺏ‬ ‫ﻤﻥ‬ ‫ﺍﻟﻤﺴﺘﺤﺼﻠﺔ‬ ‫ﺍﻟﺒﻴﺎﻨﺎﺕ‬ ‫ﺍﻟﻤﻘﺎﺭﻨﺔ‬ ‫ﻷﻏﺭﺍﺽ‬ ‫ﺍﻟﺘﺠﺭﻴﺒﻴﺔ‬. ‫ﻓﻲ‬ ‫ﻤﻥ‬ ‫ﺍﻻﻨﻀﻐﺎﻁ‬ ‫ﻨﺴﺒﺔ‬ ‫ﺘﻐﻴﻴﺭ‬ ‫ﻋﻠﻰ‬ ‫ﺍﻟﻌﻤل‬ ‫ﺘﻀﻤﻥ‬ ‫ﺍﻟﻌﻤﻠﻲ‬ ‫ﺍﻟﺠﺎﻨﺏ‬ 7 ‫ﺇﻟﻰ‬ 11 ‫ﺍﺨﺘﺒﺎﺭﺍﺕ‬ ‫ﻓﻲ‬ ‫ﺍﻟﻤﺘﻐﻴﺭﺓ‬ ‫ﺍﻟﺴﺭﻋﺔ‬ , ‫ﺍﻟﻤﺤﺭﻙ‬ ‫ﺃﺩﺍﺀ‬ ‫ﻋﻠﻰ‬ ‫ﺍﻟﺤﺼﻭل‬ ‫ﺘﻡ‬. ‫ﺃﺩﺍﺀ‬ ‫ﻨﺘﺎﺌﺞ‬ ‫ﻋﺭﺽ‬ ‫ﺘﻡ‬ ‫ﺍﻟﻨﻅﺭﻱ‬ ‫ﺍﻟﺠﺎﻨﺏ‬ ‫ﻭﻓﻲ‬ ‫ﺍﻟﻀﻐﻁ‬ ‫ﻤﺠﺎﻻﺕ‬ ‫ﻭﻜﺫﻟﻙ‬ ‫ﻤﺤﺭﻙ‬ , ‫ﺍﻟﻤﺴﺘﺨﻠﺼﺔ‬ ‫ﻭﺍﻟﻌﺎﺩﻡ‬ ‫ﺍﻟﺴﺤﺏ‬ ‫ﻗﻨﻭﺍﺕ‬ ‫ﻓﻲ‬ ‫ﻭﺍﻟﺴﺭﻉ‬ ‫ﺍﻟﺤﺭﺍﺭﺓ‬ ‫ﺩﺭﺠﺔ‬ ‫ﺍﻟﻐﺎ‬ ‫ﺍﻟﺘﺒﺎﺩل‬ ‫ﺒﺭﻨﺎﻤﺞ‬ ‫ﻤﻥ‬ ‫ﺍﻟﺨﺼﺎﺌﺹ‬ ‫ﻁﺭﻴﻘﺔ‬ ‫ﺒﻭﺍﺴﻁﺔ‬ ‫ﺯﻱ‬. PDF created with pdfFactory Pro trial version www.pdffactory.com
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