In this study, various investigations were performed on the reduction of calculation errors of compressor models which can calculate compressor performance (pressure ratio, rotational speed) at an arbitrary operating point. For this purpose, three compressor models, including the Jensen & Kristensen model and the newly modified model, are presented in this study. By applying these models, the compressor pressure ratio and rotational speed prediction calculation results are compared with four other compressors. From these, we confirmed the performance characteristics of each model and reduced calculation errors near the surge limit, near the choking limit, and in the high speed range, which was a problem in the standard J & K compressor model. Also, the application performance of the compressor model during actual engine operation is presented through an experiment with a 1.4 liter WGT diesel engine. The pressure measurement error had a large effect on the calculation error of the low rotational speed region, and the influence decreased as the rotational speed increased. The calculation error of the compressor rotational speed was less than 10 % when the rotational speed was higher than 33 % of the maximum rotational speed of the compressor, and accuracy was improved as the rotational speed increased.

中文翻译：

---

离心压缩机模型压力比和转速计算的性能改进

在这项研究中，对减少压缩机模型的计算误差进行了各种研究，这些模型可以计算任意工作点的压缩机性能（压力比，转速）。为此，本研究提出了三种压缩机模型，包括Jensen＆Kristensen模型和新修改的模型。通过应用这些模型，将压缩机的压力比和转速预测计算结果与其他四个压缩机进行了比较。由此，我们确定了每个模型的性能特征，并减少了在喘振极限附近，在节流极限附近以及在高速范围内的计算误差，这在标准的J＆K压缩机模型中是一个问题。也，通过一个1.4升WGT柴油发动机的实验，展示了压缩机模型在实际发动机运行中的应用性能。压力测量误差对低转速区域的计算误差有很大的影响，并且随着转速的增加影响减小。当转速高于压缩机最大转速的33％时，压缩机转速的计算误差小于10％，并且随着转速的增加，精度提高。