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Acoustic analysis of a single cylinder diesel engine using biodiesel fuel blends

机译:使用生物柴油燃料混合的单缸柴油机声学分析

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Fuel type has a direct effect on the quality of IC engine's combustion phenomenon. One of the most important quality parameters that can be fluctuated by fuel type is engine noise. The purpose of this study is to analyze the noise parameter of a diesel engine using BO, B5 (5% vol., biodiesel and 95% vol., diesel blends), B10, B15, B20, B25 and B30 biodiesel-diesel blends. This study was carried out at stationary position and at three positions such driver's left ear position (Drivers Left Ear Position-DLEP), 1.5 meter (1.5 meter Away From Exhaust-MAFE) and 7.5 meters (7.5 meter Away From Exhaust-MAFE) away from exhaust at 6 engine speeds (1200, 1400, 1600, 1800, 2000 & 2200 RPM). The results proved that the lowest and highest Sound Pressure Level (SPL) of power tiller takes place at B10, and B30 respectively. The SPL increased by 7.8 dB for increasing engine speed from 1200 to 2200 RPM. The test results showed that the average SPL at DLEP was 4.3 dB higher than 7.5 MAFE position. The dominant frequency of engine noise was315Hz that exhaust structure is the source of it. In this frequency SPL of B10 was, 23%lower than thefuelB30 (a mixture of 30percentbiodiesel and70percentdieselfuel, respectively). The slightest and strongest sound by using theB10, B30 fuel mixture was produced respectively.
机译:燃料类型对IC发动机燃烧现象的质量直接影响。可以通过燃料类型波动的最重要的质量参数之一是发动机噪声。本研究的目的是使用BO,B5(5%Vol.,生物柴油和95%Vol。,柴油混合物),B10,B15,B20,B25和B30生物柴油 - 柴油混合物分析柴油发动机的噪声参数。本研究在固定位置进行,在三个位置,此类驾驶员的左耳位置(驾驶员左耳位置-DLEP),1.5米(远离排气机制1.5米)和7.5米(距离排气后的排气速度为7.5米)从排气到6发动机速度(1200,1400,1600,1800,2000和2200rpm)。结果证明,在B10和B30分别发生了电力分蘖的最低和最高声压(SPL)。 SPL增加7.8 dB,以增加1200至2200rpm的发动机速度。测试结果表明,DLEP的平均SPL为4.3 dB高于7.5 Mafe位置。发动机噪声的主导频率为315Hz,排气结构是它的源泉。在该频率下,B10的分裂比Fulb30低23%(分别为30percentiesel和70percentdieselfuel的混合物)。通过使用B30,B30燃料混合物的丝毫和最强烈的声音。

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