液氧固碳闭式循环柴油机着火机理研究

doi:10.3901/JME.2023.16.370

机械工程学报 ›› 2023, Vol. 59 ›› Issue (16): 370-378.doi: 10.3901/JME.2023.16.370

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液氧固碳闭式循环柴油机着火机理研究

丁乐康¹, 刘永峰¹, 毕贵军², 姚圣卓¹, 杨建伟¹, 刘海峰³, 宋金瓯³

1. 北京建筑大学北京市建筑安全监测工程技术研究中心北京 102616;
2. 新加坡制造技术研究所新加坡 637662 新加坡;
3. 天津大学先进内燃机动力全国重点实验室天津 300072

收稿日期:2022-08-06 修回日期:2022-11-05 出版日期:2023-08-20 发布日期:2023-11-15
通讯作者: 刘永峰(通信作者),男,1973年出生,博士,教授,博士研究生导师。主要研究方向为发动机节能与优化。E-mail:liuyongfeng@bucea.edu.cn
作者简介:丁乐康,男,1997年出生。主要研究方向为内燃机。E-mail:2108520119027@stu.bucea.edu.cn;毕贵军,男,1971年出生,博士,研究员,博士研究生导师。主要研究方向为激光增材及增减材制造技术。E-mail:gjbi@SIMTech.a-star.edu.Sg
基金资助:
国家自然科学基金(51976007);先进内燃动力全国重点实验室开放研究(K2023-04)资助项目。

Study on the Ignition Mechanism of Closed Cycle Diesel Engine System with Liquid Oxygen Carbon Sequestration

DING Lekang¹, LIU Yongfeng¹, BI Guijun², YAO Shengzhuo¹, YANG Jianwei¹, LIU Haifeng³, SONG Jinou³

1. Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing University of Civil Engineering and Architecture, Beijing 102616;
2. Singapore Institute of Manufacturing Technology, Singapore 637662 Singapore;
3. State Key Laboratory of Engines, Tianjin University, Tianjin 300072

Received:2022-08-06 Revised:2022-11-05 Online:2023-08-20 Published:2023-11-15

摘要/Abstract

摘要： 为研究液氧固碳闭式循环柴油机的着火特性，提出柴油表征燃料正庚烷(n-C₇H₁₆)在O₂/CO₂环境中的化学反应机理（简称COCD机理）。该机理考虑CO₂的两种效应（热效应和第三体效应）对正庚烷着火过程的影响，计算多个工况下的着火延迟时间，采用定容燃烧弹（Constant volume combustion chamber,CVCC）可视化试验平台模拟液氧固碳闭式循环柴油机的真实工况并进行试验，对COCD机理的计算结果进行验证。研究CO₂的两种效应对着火延迟时间的影响，采用敏感性分析和产率分析的方法研究不同工况下着火过程中的关键反应。结果表明，COCD机理的预测值在61% O₂/39% CO₂、53% O₂/47% CO₂、45% O₂/55% CO₂以及40% O₂/60% CO₂的工况下的最大误差为7.5%，最小误差为1.3%。在O₂/CO₂环境中，反应C₇H₁₄O₂H+O₂→C₇H₁₄O₂HO₂和H₂O₂+M→2OH分别是影响正庚烷第一阶段和第二阶段放热的主要反应。

关键词: 着火特性, O₂/CO₂环境, CVCC试验

Abstract: In order to study the ignition characteristics of liquid oxygen solid carbon closed cycle diesel engine,a diesel surrogate fuel n-heptane(n-C₇H₁₆) mechanism（COCD mechanism） in the O₂/CO₂ atmospheres is proposed.The mechanism considers two effects of CO₂（thermal third body effects） on n-heptane ignition process,which are employed to calculate the ignition delay time under multiple working conditions.The constant volume combustion chamber（CVCC） visual test platform are established to simulate the real working conditions of the liquid oxygen solid carbon closed cycle diesel engine for relevant experiment,which is also used for verifying the COCD mechanism.The two effects of CO₂ on the ignition delay time are compared and the key reactions in the ignition process under different conditions are studied by sensitivity analysis and rate of production（ROP） analysis.The maximum and minimum errors of the COCD mechanism predictions are 7.5%and 1.3%under the working conditions of 61%O₂/39%CO₂,53%O₂/47%CO₂,45%O₂/55%CO₂ and 40%O₂/60%CO₂.In the O₂/CO₂ atmospheres,the reaction C₇H₁₄O₂H+O₂→C₇H₁₄O₂HO₂ and H₂O+M→2OH are the main reactions that affect the n-heptane first and second stages heat release,respectively.

Key words: ignition characteristic, O₂/CO₂ atmosphere, CVCC experiment

中图分类号:

TK421

丁乐康, 刘永峰, 毕贵军, 姚圣卓, 杨建伟, 刘海峰, 宋金瓯. 液氧固碳闭式循环柴油机着火机理研究[J]. 机械工程学报, 2023, 59(16): 370-378.

DING Lekang, LIU Yongfeng, BI Guijun, YAO Shengzhuo, YANG Jianwei, LIU Haifeng, SONG Jinou. Study on the Ignition Mechanism of Closed Cycle Diesel Engine System with Liquid Oxygen Carbon Sequestration[J]. Journal of Mechanical Engineering, 2023, 59(16): 370-378.

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液氧固碳闭式循环柴油机着火机理研究

Study on the Ignition Mechanism of Closed Cycle Diesel Engine System with Liquid Oxygen Carbon Sequestration

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