| 用单一循环LDA测量法研究四气门汽油机缸内滚流运动的湍流结构 |
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| 引用本文： | 史绍熙,刘书亮,李玉峰,许振忠.用单一循环LDA测量法研究四气门汽油机缸内滚流运动的湍流结构[J].工程热物理学报,1997(3). |
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| 作者姓名： | 史绍熙 刘书亮 李玉峰 许振忠 |
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| 作者单位： | 天津大学内燃机燃烧学国家重点实验室!天津，300072，天津大学内燃机燃烧学国家重点实验室!天津，300072，天津大学内燃机燃烧学国家重点实验室!天津，300072，天津大学内燃机燃烧学国家重点实验室!天津，300072 |
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| 基金项目： | 国家“八五”攀登计划，国家自然科学基金 |
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| 摘 要： | 本研究在一台四气门汽油机上对缸内滚流运动进行了LDA测量，通过改进测试系统提高了数据率，用低通滤波的单一循环分析法计算了湍流结构参数。结果发现，滚流的湍流结构具有尺度大、频率低的特点；滚流运动在压缩末期破碎时，湍流的自相关时间和积分时间尺度显著增加。
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| 关 键 词： | LDA循环分析法 滚流运动 湍流结构 四气门汽油机 |
A STUDY ON TURBULENCE STRUCTURE OF TUMBLE MOTION IN THE CYLINDER OF A FOUR-VAVLE SI ENGINE USING CYCLE-RESOLVED LDA MEASUREMENTS |
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| SHI Shaoxi, LIU Shuliang, LI Yufeng, XU Zhenzhong.A STUDY ON TURBULENCE STRUCTURE OF TUMBLE MOTION IN THE CYLINDER OF A FOUR-VAVLE SI ENGINE USING CYCLE-RESOLVED LDA MEASUREMENTS[J].Journal of Engineering Thermophysics,1997(3). |
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| Authors: | SHI Shaoxi LIU Shuliang LI Yufeng XU Zhenzhong |
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| Abstract: | In this work, LDA measurement of tumble motion in a 4-valve SI engine was carried out with sufficient data rate so that cycle-resolved turbulence parameters can be calculated by means of low-pass filter. These results show that turbulence structure generated by tumble has the characteristics of larger scale and lower frequency, and therefore autocorrelation coefficient and intergal time scale of turbulence are considerably increased when tumble breaks up at the end of compression. |
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| Keywords: | cycle-resolved LDA measurement tumble motion turbulence structure four-valve SI engine |
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