科研之友
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摘要
The aim of this work is to investigate and analyze the spray and exhaust emission characteristics of biodiesel fuel derived from soybean oil in a diesel engine both experimentally and numerically The spray characteristics of biodiesel fuel are measured and investigated in a constant volume vessel and analyzed using spray images obtained by a high speed camera The calculated combustion and exhaust emission characteristics of the biodiesel fuel are compared to experimental results from diesel fuel The combustion and exhaust emission calculations for the biodiesel fuel are performed in KIVA 3v code Investigations revealed that biodiesel fuel shows a fast spray development in the initial stage of injection However, at the end of injection, the biodiesel spray shows a somewhat slow development compared to diesel spray in the same injection quantity conditions In addition, the biodiesel spray targeted the piston lib due to the piston geometry and the low ambient gas density at an injection timing of BTDC 30 degrees At this time, the spray and combustion temperature distributions are concentrated within the entire engine cylinder, while they are mainly concentrated in the piston bowl region when injected after BTDC 30 degrees When compared to diesel fuel at the same injection quantity, biodiesel fuel shows lower NO(x) and soot emissions, and the CO and HC emissions of biodiesel fuel show similar trends
- 出版日期2010-11
