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近十年来，由于能源和环保的要求，火花点火天然气发动机以高效、低污染燃烧的优点正在迅速发展。为了分析和研究这种发动机的燃烧过程，预测多种参数变化对性能的影响，建立了火花点火式天然气发动机的准维燃烧模型。根据倒拖发动机的实验结果，对缸内紊流的衰减和产生进行了模化，提出了缸内紊流强度计算的方法。试验表明，模型的计算值和试验值具有很好的一致性。该模型计算精度高、工程应用方便，为缸内燃烧过程分析、性能预测提供了一种有效的工具。
In the past decade, the advantages of spark ignition natural gas engines with high efficiency and low pollution combustion are rapidly developing because of energy and environmental requirements. In order to analyze and study the combustion process of this kind of engine and predict the influence of many parameters on the performance, a quasi-dimensional combustion model of a spark-ignition natural gas engine is established. According to the experimental results of inverted engine, the attenuation and generation of turbulence in the cylinder were modeled, and the method of calculating the turbulence intensity in the cylinder was put forward. Experiments show that the calculated value of the model is in good agreement with the experimental value. The model has high calculation accuracy and convenient application, which provides an effective tool for in-cylinder combustion process analysis and performance prediction.