柴油机燃用生物柴油表面辐射噪声测试与研究

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采用表面声压级测量法,对发动机分别燃用生物柴油和纯柴油的表面辐射噪声进行了试验研究,结果表明:发动机燃用生物柴油的表面辐射噪声明显低于燃用纯柴油,两者表面辐射噪声频谱变化较小,燃用柴油在1000~1600Hz范围的噪声级略大于生物柴油。 The surface radiated noise of biodiesel and pure diesel engine were respectively tested by surface acoustic pressure level measurement method. The results show that the radiated noise of engine biodiesel is obviously lower than that of pure diesel fuel, the surface of both The radiated noise has a small change in spectrum, and the noise level of diesel fuel used in the range of 1000 ~ 1600Hz is slightly larger than that of biodiesel.
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