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作者研制了可以用于测量柴油机缸内气体温度的铂--铂铑双丝热电偶传感器,文中叙述了这种热电偶传感器的结构特点。上述传感器与微机快速采样系统联合使用后.作者用双丝法对所采集到的瞬态温度数据进行了修正,从而实测得到双区计算模型所需的缸内气体的温度。本文提出了一种柴油机放热计算的双区计算模型。该模型以实测的未燃区的空气温度作为原始数据之一,与一般的放热计算方法相比,由于多用了一组未燃区的气体温度作为计算中输入的原始数据,它可以算出燃烧过程中任何时刻的燃烧区域的过量空气系数、燃烧区的扩展速率、空气向燃烧区的卷入速率等描述燃烧放热过程的有用参数,因而能够比一般的计算方法更深刻地揭示柴油机燃烧过程进展的特点。
The author has developed a platinum-platinum-rhodium twin wire thermocouple sensor that can be used to measure the gas temperature inside a diesel engine. The structural features of this thermocouple sensor are described. After the above sensor is used in combination with the fast sampling system of the computer, the author revised the transient temperature data collected by double-wire method, and obtained the temperature of the cylinder gas required by the dual-zone calculation model. In this paper, a two-zone calculation model for exothermic calculation of diesel engine is proposed. The model uses the measured air temperature of the unburned zone as one of the raw data. Compared with the general exothermic calculation method, the combustion temperature can be calculated by using the gas temperature of a set of unburned zones as the raw data input in the calculation The excess air coefficient of the combustion zone at any time in the process, the expansion rate of the combustion zone, the entrainment rate of the air into the combustion zone, and the like describe the useful parameters of the combustion exothermic process so that the combustion process of the diesel engine can be revealed more deeply than the general calculation method The characteristics of progress.