| 张超,许愿,郑子康,等.中介尺度内燃机甲醇-汽油混合燃料燃烧特性试验研究[J].内燃机工程,2024,45(6):12-19. |
| 中介尺度内燃机甲醇-汽油混合燃料燃烧特性试验研究 |
| Experimental Study on Combustion Characteristics of Methanol-Gasoline Blend Fuel in Intermediate-Scale Internal Combustion Engines |
| DOI：10.13949/j.cnki.nrjgc.2024.06.002 |
| 关键词:中介尺度内燃机 甲醇 汽油 燃烧特性 |
| Key Words:medium-scale internal combustion engine methanol gasoline combustion characteristic |
| 基金项目:道路交通安全公安部重点实验室开放课题项目（2023ZDSYSKFKT12） |
|
| 摘要点击次数: 382 |
| 全文下载次数: 89 |
| 摘要:为研究不同转速下混合气浓度和甲醇–汽油燃料掺混比对中介尺度内燃机燃烧特性的影响，以拓阳FS-S100AC四冲程往复活塞式微型单缸机为研究对象搭建燃烧试验台架，通过失火率、平均峰值缸压、峰值缸压循环变动和燃烧持续期等参数来反映燃烧质量，其中纯汽油记为G100，纯甲醇记为M100。结果表明：高转速下中介尺度内燃机失火率为0；转速较低时存在失火现象，并且λ与掺混比均对失火率有影响。平均峰值缸压随混合气浓度的增加而下降，λ为1.2时其值最大。当λ相同时呈现两头高中间低的趋势，且M100高于G100；当燃料掺混比和λ相同时，平均峰值缸压随转速的增大而上升。当λ和转速相同时，峰值缸压循环变动随甲醇掺混比的减少而下降，且混合气浓度越高峰值缸压循环变动越大。当掺混比和过量空气系数相同时，峰值缸压循环变动随转速的上升而减小。当λ相同时，中介尺度内燃机在各转速下燃烧持续期随甲醇掺混比的减少而上升，燃烧G100燃烧持续期最长。5种燃料的燃烧持续期均随均质混合气浓度的增加而下降，当λ为0.8时最短。当燃料和均质混合气浓度相同时，燃烧持续期随转速的增大而下降。 |
| Abstract:To investigate the influence of different air-fuel mixture concentrations and methanol-gasoline blending ratios on the combustion characteristics of an intermediate-scale internal combustion engine， a combustion test bench was constructed using the Tuoyang FS-S100AC four-stroke reciprocating piston micro single-cylinder engine as the research object. Parameters such as misfire rate， average peak cylinder pressure， peak cylinder pressure cycle variation， and combustion duration were used to reflect combustion quality. Pure gasoline was denoted as M100 and pure methanol was denoted as G100. The results show that at high speeds， the misfire rate of the intermediate-scale engine is zero. Misfire phenomena occurs at lower speeds， and both λ and blending ratio have an impact on the misfire rate. The average peak cylinder pressure decreases with increasing air-fuel mixture concentration， with the maximum value observed at λ=1.2. When λ is constant， there is a trend of higher values at both ends and lower values in the middle， with M100 higher than G100. When the fuel blending ratio and λ are constant， the average peak cylinder pressure increases with increasing rotational speed. When λ and the rotational speed are constant， the variation of peak cylinder pressure cycle decreases with decreasing methanol blending ratio. And the higher the air-fuel mixture concentration， the greater the variation of peak cylinder pressure cycle. When the blending ratio and excess air coefficient are constant， the variation of peak cylinder pressure cycle decreases with the increase of the rotational speed. When λ is constant， the combustion duration of the intermediate-scale engine increases with the decrease of methanol blending ratio， and the combustion duration for G100 combustion is the longest. The combustion duration of the five fuels decreases with the increase of homogenous air-fuel mixture concentration， with the shortest duration observed at λ=0.8. When the fuel and homogenous air-fuel mixture concentration is constant， the combustion duration decreases with the increase of the rotational speed. |
|
查看全文 HTML
查看/发表评论 下载PDF阅读器 |