Experimental and numerical study on auto-ignition characteristics of the PODE-diesel blends (PDF)
发布时间：2025-04-30
点击次数：
- 发布时间：
- 2025-04-30
- 论文名称：
- Experimental and numerical study on auto-ignition characteristics of the PODE-diesel blends (PDF)
- 发表刊物：
- Energy Fuels
- 摘要：
- A modified cooperative fuel research (CFR) octane rating engine and a constant-volume combustion chamber (CID510) were adopted to investigate the effect of the addition of Polyoxymethylene dimethyl ether (PODE) on the ignition characteristics of diesel fuels. PODE was blended in diesel fuel with volume fraction from 0% to 30%. The ignition delay times of PODE/diesel blends were obtained on constant-volume combustion chamber at a temperature of 833 K~893 K and a reduction of environmental oxygen (O2) content range from 21% to 12.8%. With PODE addition, the ignition delay time decreases, while the onset of low-temperature heat release (LTHR) moves forward and the peak of LTHR increases. The blends with higher PODE fraction can weaken the negative effect on ignition delay caused by the reduction of oxygen content in air. Critical compression ratio (CCR) and apparent heat release rate of binary blends were measured on the CFR engine at an equivalence ratio of 0.5 under HCCI combustion mode. The CCR becomes lower with higher PODE content in the blend. All blends exhibited two-stage ignition. The blends with higher PODE fraction give a higher percentage of LTHR. Numerical simulation reveals that decomposition of PODE produces more CH2O, which accelerates the low-temperature reaction. The reactions related to O and O2 are enhanced by oxygen available in PODE, which along with the molecular structure of PODE, results in higher reactivity for the PODE/diesel binary blends.
- 合写作者：
- Meng X, Hu EJ, Yoo KH, Boehman AL, Huang ZH
- 卷号：
- 2019, 33(3): 2538-2546
- 页面范围：
- 2538-2546
- 是否译文：
- 否
- 发表时间：
- 2019-03-21