高活性低辛烷值汽油压燃着火特性与表征燃料构建

doi:10.3969/j.issn.1674-8484.2022.04.019

汽车安全与节能学报 ›› 2022, Vol. 13 ›› Issue (4): 778-784.DOI: 10.3969/j.issn.1674-8484.2022.04.019

高活性低辛烷值汽油压燃着火特性与表征燃料构建

果泽先¹(), 王步宇², 王博远¹, 张启航¹, 蔡开源¹, 王志¹, 帅石金¹^,²^,^*()

1.清华大学，汽车安全与节能国家重点实验室，北京 100084，中国
2.清华大学航空发动机研究院，北京 100084，中国

收稿日期:2022-10-06 修回日期:2022-10-24 出版日期:2022-12-31 发布日期:2023-01-01
通讯作者: 帅石金
作者简介:*帅石金(1965—)，男(汉)，江西，教授。E-mail：sjshuai@tsinghua.edu.cn。
果泽先(1993—)，男(汉)，辽宁，博士研究生。E-mail：gzx16@mails.tsinghua.edu.cn。
基金资助:
国家自然科学基金面上项目(NSFC 51976101)

Compression ignition characteristics and surrogate formulation of a high reactivity low research octane number (RON) gasoline

GUO Zexian¹(), WANG Buyu², WANG Boyuan¹, ZHANG Qihang¹, CAI Kaiyuan¹, WANG Zhi¹, SHUAI Shijin¹^,²^,^*()

1. State Key Laboratory of Automotive Safety and Energy, School of Vehicle and Mobility, Tsinghua University, Beijing 100084, China
2. Institute for Aero Engine, Tsinghua University, Beijing 100084, China

Received:2022-10-06 Revised:2022-10-24 Online:2022-12-31 Published:2023-01-01
Contact: SHUAI Shijin

摘要/Abstract

摘要：

为了解析汽油压燃（GCI）模式的燃烧排放特性，针对一种高活性低辛烷值汽油（HRG）开展了表征燃料设计研究。基于快速压缩机（RCM）平台，在有效温度690~920 K内，对该汽油燃料进行着火滞燃期试验；基于Chemkin软件对正庚烷/异辛烷（PRF）、正庚烷/异辛烷/甲苯（TRF）以及异己烷/正庚烷/异辛烷/甲苯（iso-HS）等3种表征燃料的滞燃期进行模拟。结果表明：与PRF及TRF相比，iso-HS呈现出更加显著的负温度系数（NTC）现象，且随着异己烷含量的提高，其负温度系数区域滞燃期变化幅度近似线性提高；组成为（按摩尔分数计）49.63%异己烷、18.30%异辛烷、26.29%正庚烷及5.78%甲苯的表征燃料iso-HS2具有更好的表征效果。

关键词: 高活性低辛烷值汽油（HRG）, 表征燃料, 着火滞燃期, 快速压缩机（RCM）

Abstract:

A surrogate design was conducted for a high reactivity low octane number gasoline (HRG) to investigate the combustion and emission characteristics of gasoline compression ignition (GCI) mode. The ignition delay times of the HRG were measured using a rapid compression machine (RCM) in the effective temperature range of 690~920 K. Kinetic modelling study was conducted using Chemkin software with 3 surrogate fuels: n-heptane/iso-octane (PRF), n-heptane/iso-octane/toluene (TRF), and iso-hexane surrogates (iso-HS) consisting of iso-hexane, n-heptane, iso-octane and toluene. The results show that compared with PRF and TRF, the iso-hexane surrogates show more obvious negative temperature coefficient (NTC) behavior; The variation amplitude of the ignition delay times within the NTC region increases approximately linearly with iso-hexane contents increasing; The surrogate iso-HS2 consisting of 49.63% iso-hexane, 18.30% iso-octane, 26.29% n-heptane and 5.78% toluene (by mole fraction) can better capture the ignition characteristics of the HRG.

Key words: high reactivity low research octane number gasoline (HRG), surrogate, ignition delay, rapid compression machine (RCM)

中图分类号:

TK428.9

果泽先, 王步宇, 王博远, 张启航, 蔡开源, 王志, 帅石金. 高活性低辛烷值汽油压燃着火特性与表征燃料构建[J]. 汽车安全与节能学报, 2022, 13(4): 778-784.

GUO Zexian, WANG Buyu, WANG Boyuan, ZHANG Qihang, CAI Kaiyuan, WANG Zhi, SHUAI Shijin. Compression ignition characteristics and surrogate formulation of a high reactivity low research octane number (RON) gasoline[J]. Journal of Automotive Safety and Energy, 2022, 13(4): 778-784.

图/表 9

参考文献 20

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RON	61
MON	61
H/C摩尔比	2.23
20 ℃密度 / (kg·m^-3)	685.0
20 ℃运动粘度/ (mm²·s^-1)	0.630 7
低热值 / (MJ·kg^-1)	44.90
10%蒸发温度 / ℃	71.9
50%蒸发温度 / ℃	82.3
90%蒸发温度 / ℃	101.8
终馏点 / ℃	119.0

RON	61
MON	61
H/C摩尔比	2.23
20 ℃密度 / (kg·m^-3)	685.0
20 ℃运动粘度/ (mm²·s^-1)	0.630 7
低热值 / (MJ·kg^-1)	44.90
10%蒸发温度 / ℃	71.9
50%蒸发温度 / ℃	82.3
90%蒸发温度 / ℃	101.8
终馏点 / ℃	119.0

组分	w_m / %	组分	w_m / %
3-甲基己烷	11.3	3-甲基庚烷	2.2
正己烷	10.0	正戊烷	2.1
2-甲基戊烷	9.6	正辛烷	2.1
2-甲基己烷	9.2	2,3-二甲基丁烷	1.9
正庚烷	8.4	2-甲基庚烷	1.8
3-甲基戊烷	7.9	2,4-二甲基戊烷	1.7
2,3-二甲基戊烷	3.4	2,2-二甲基戊烷	1.3
甲基环戊烷	2.7	3,3-二甲基戊烷	1.2
苯	2.6	2,2-二甲基丁烷	1.2
异戊烷	2.3	3-乙基戊烷	1.2

组分	w_m / %	组分	w_m / %
3-甲基己烷	11.3	3-甲基庚烷	2.2
正己烷	10.0	正戊烷	2.1
2-甲基戊烷	9.6	正辛烷	2.1
2-甲基己烷	9.2	2,3-二甲基丁烷	1.9
正庚烷	8.4	2-甲基庚烷	1.8
3-甲基戊烷	7.9	2,4-二甲基戊烷	1.7
2,3-二甲基戊烷	3.4	2,2-二甲基戊烷	1.3
甲基环戊烷	2.7	3,3-二甲基戊烷	1.2
苯	2.6	2,2-二甲基丁烷	1.2
异戊烷	2.3	3-乙基戊烷	1.2

	PRF	TRF	iso-HS1	iso-HS2	iso-HS3
正庚烷	0.418 4	0.418 0	0.185 4	0.262 9	0.340 5
异辛烷	0.581 6	0.549 0		0.183 0	0.365 9
甲苯	-	0.033 0	0.070 2	0.057 8	0.045 4
异己烷	-	-	0.744 5	0.496 3	0.248 2

高活性低辛烷值汽油压燃着火特性与表征燃料构建

Compression ignition characteristics and surrogate formulation of a high reactivity low research octane number (RON) gasoline

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