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首页> 外文学位 >High pressure soot formation in non-smoking methane-air laminar diffusion flames from 1.5 MPa to 6.0 MPa.
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High pressure soot formation in non-smoking methane-air laminar diffusion flames from 1.5 MPa to 6.0 MPa.

机译：从1.5 MPa至6.0 MPa的无烟甲烷-空气层流扩散火焰中高压烟灰形成。

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Measurements of soot concentration, flame temperature and flame geometry have been recorded for non-smoking methane-air laminar diffusion flames at pressures from P = 1.5 MPa to P = 6.0 MPa. Soot concentration and temperature profiles were obtained using the spectral soot emission diagnostic method and the Abel inversion deconvolution technique. Visual inspection and measurement of the flame revealed a slight increase in height and decrease in cross-section with increasing pressure. Soot volume fraction increased with pressure according to fv max ∝ P1.4 for 1.5 ≤ P ≤ 5.0 MPa. The maximum carbon conversion to soot was related to pressure following the relationship eta s,max ∝ P0.55 for 1.5 ≤ P ≤ 5.0 MPa. The maximum value of carbon converted to soot was etas,max = 10.1% at P = 5.0 MPa. The maximum soot concentration was always found at a height approximately half way between the burner and the flame tip. The temperature was lower in high soot loading regions of the flame. For the same height in the flame, temperature decreased with increasing pressure.
机译：记录了在P = 1.5 MPa至P = 6.0 MPa压力下非吸烟甲烷-空气层流扩散火焰的烟尘浓度，火焰温度和火焰几何形状的测量值。使用光谱烟尘排放诊断方法和Abel反演反卷积技术获得烟尘浓度和温度曲线。目视检查和测量火焰发现，随着压力的增加，火焰高度略有增加，而横截面减小。当f≤P≤5.0 MPa时，烟灰体积分数随fv max ∝ P1.4的增加而增加。对于1.5≤P≤5.0 MPa，最大碳转化为烟灰与压力有关，其关系为eta s，max ∝ P0.55。在P = 5.0 MPa时，转化为烟灰的碳的最大值为etas，max = 10.1％。始终在燃烧器和火焰尖端之间大约一半的高度处发现最大烟灰浓度。在火焰的高烟灰负载区域中温度较低。对于相同高度的火焰，温度随着压力的增加而降低。

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