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首页> 外文会议>ASME Internal Combustion Engine Division Technical Conference >IN-CYLSNDER VELOCITY MEASUREMENTS AND ANALYSIS IN A BRIGGS AND STRATTON ENGINE
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IN-CYLSNDER VELOCITY MEASUREMENTS AND ANALYSIS IN A BRIGGS AND STRATTON ENGINE

机译：缸内速度测量和Briggs和Stratton发动机的分析

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Unsteady velocity measurements made near the spark-plug location of an IC engine using a single-component fiber-optic LDV probe are reported. Measurements were made within a motored Briggs and Stratton single-cylinder air-cooled engine at ～780RPM. Data obtained was analyzed using Ensemble averaging, High-pass filtering, Wavelet Decomposition (WD), Proper-Orthogonal Decomposition (POD), and Wavelet-decomposition together with Principal Component Analysis (WD/PCA) techniques to determine the unsteady mean velocity and unsteady turbulence variations in such an engine. The results of the analysis are compared to each other. WD/PCA technique recommended for future engine unsteady flow studies was used to determine the cycle-to-cycle variations. Results indicate to large cycle-to-cycle variations in such an engine.
机译：报告了使用单组分光纤LDV探针的IC发动机的火花塞位置附近的不稳定速度测量。在〜780rpm的电动Briggs和Stratton单缸空气冷却发动机内进行测量。使用集合平均，高通滤波，小波分解（WD），适当的正交分解（POD），与主成分分析（WD / PCA）技术一起分析所获得的数据，以确定不稳定的平均速度和不稳定这种发动机的湍流变化。分析结果彼此比较。推荐用于未来发动机非定常流量研究的WD / PCA技术用于确定周期到循环变化。结果表明这种发动机的大周期到循环变化。

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