Development of Numerical Method for the Analysis of Low Emission Combustion using Artificial Turbulence Stimulation

利用人工湍流刺激分析低排放燃烧的数值方法的开发

• 批准号: 13650238
• 负责人: NISHIWAKI Kazuie
• 金额: $ 0.51万
• 依托单位: Ritsumeikan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650238/
• 关键词: Premixed Charge Compression Ignition; Auto-Ignition Reaction; Large Eddy Simulation; Initial Turbulent Velocity Field; Low Emission Engine; Diesel Engine; Computational Fluid Dynamics; Homogeneous Charge Compression Ignition; 圧縮自着火燃焼; 自着火; 乱流

A new method for the computational analysis of premixed charge compression ignition combustion has been developed. The method employs Very Large Eddy Stimulation (VLES) in conjunction with chemical reactions, solving temporal and spatial fluctuations of velocities and temperatures in a numerical cell size, and simulating the random nature of the appearance of auto-ignition spots. Using a novel idea in the implementation of the simulation, we give statistically reasonable initial condition for a fluctuating turbulent flow field at intake valve closing time. The phase-averaged result of the VLES and the result of the k-epsilon model are well in agreement with respect to mean flow, mean temperature, cylinder-averaged turbulence kinetic energy and pressure during compression. The VLES exhibits the spatially random appearance of auto-ignition sites, which is similar to experimental observations shown in the literature. The analysis shows that the spatially random occurrence of the auto-ignition is due to the local wall heat transfer which changes randomly and generates temperature fluctuations. This study presents a new computational approach to analyze the mechanism of the premixed charge compression ignition combustion.

本文提出了一种新的预混压燃燃烧计算分析方法。该方法采用超大涡模拟（VLES）结合化学反应，解决时间和空间波动的速度和温度的数值细胞大小，并模拟随机性质的外观自燃点。采用一种新的思想，在模拟的实施，我们给了统计上合理的初始条件，在进气门关闭时的脉动湍流流场。压缩过程中的平均流量、平均温度、缸内平均湍流动能和压力等参数的相平均计算结果与k-S模型的计算结果吻合较好。的VLES表现出空间随机外观的自燃点，这是类似的文献中所示的实验观察。分析表明，自燃的空间随机发生是由于局部壁面传热的随机变化和产生的温度波动。本研究提供了一种新的计算方法来分析预混充量压缩着火燃烧的机理。

项目成果

西條克哉, 西脇一宇, 吉原福全: "予混合圧縮自着火機関における自着火開始の数値計算法の検討"日本機械学会論文集(B編). 68 676. 224-231 (2002)

Katsuya Saijo、Kazuu Nishiwaki、Fukuzen Yoshihara：“均质压缩自点火发动机中启动自点火的数值计算方法的研究”日本机械工程师学会会刊（B 版）68 676. 224-231（2002 年）。 ）

K. Saijyo, K. Nishiwaki, and Y. Yoshihara: "Numerical Analyses of the Interaction between Thermo-Fluid Dynamics and Auto-Ignition Reaction in Spark-Ignition Engines"JSME International Journal, Series B. Vol. 46, No. 1. 44-51 (2003)

K. Saijyo、K. Nishiwaki 和 Y. Yoshihara：“火花点火发动机中热流体动力学与自点火反应之间相互作用的数值分析”JSME 国际期刊，B 系列卷。

K.Saijyo, K.Nishiwaki, Y.Yoshihara: "Numerical Analyses of the Interaction between Thermo-Fluid Dynamics and Auto-Ignition Reaction in Spark-Ignition Engines"JSME International Journal-(Series B). 46・1. 44-51 (2003)

K.Saijyo、K.Nishiwaki、Y.Yoshihara：“火花点火发动机中热流体动力学与自点火反应之间相互作用的数值分析”JSME 国际期刊-（系列 B）44-51。 (2003)

K.Saijyo, K.Nishiwaki, Y.Yoshihara: "Numerical Analyses of the Interaction between Thermo-Fluid Dynamics and Auto-Ignition Reaction in Spark-Ignition Engines"JSME International Journal-(Series B). 46 1. 44-51 (2003)

K.Saijyo、K.Nishiwaki、Y.Yoshihara：“火花点火发动机中热流体动力学与自点火反应之间相互作用的数值分析”JSME 国际期刊-（B 系列）。

K.Nishiwaki, K.Saijyo, K.Nojiri, T.Kojima, Y.Yoshihara: "Random Motion Simulation for the Analyses of Auto-Ignition in HCCI Engines and S. I. Engines"Proceedings of FISITA 2002. F02 V288. 1-12 (2002)

K.Nishiwaki、K.Saijyo、K.Nojiri、T.Kojima、Y.Yoshihara：“HCCI 发动机和 S.I. 发动机自动点火分析的随机运动模拟”FISITA 2002 年论文集。F02 V288。