离心式压气机是柴油机的核心部件，其性能直接关系到柴油机效率和动力输出。传统的预测柴油机离心压气机二维计算方法存在精度与复杂度的限制，需改进才能提高预测准确性。本文基于改进的流线曲率法对2种离心式压气机通流特性进行预测分析，并与试验结果进行对比。结果表明，改进的流线曲率法对离心式压气机气动性能的预测结果与试验结果吻合较好，改进后的流线曲率法在近设计工况下的预测相对误差不超过5%，验证了该方法的可靠性和准确性，说明改进的流线曲率法不仅提高了离心式压气机性能预测的精度，还拓宽了适用工况范围，且该方法能够为柴油机离心压气机部件的设计及优化过程提供有力支持，缩短研制周期并降低研制费用。
The centrifugal compressor, as a key component of the diesel engine, directly affects the efficiency and power output of the diesel engine. The traditional two-dimensional calculation method for predicting the aerodynamic performance of the diesel centrifugal compressor needs to be improved to enhance the prediction accuracy. In this paper, the aerodynamic performance of two centrifugal compressors was predicted and analyzed based on the improved streamline curvature method, and the results were compared with the experimental data. The results show that the predicted aerodynamic performance of the centrifugal compressor using the improved streamline curvature method is in good agreement with the experimental results, and the relative error of the prediction at the near design condition is less than 5%. This verifies the reliability and accuracy of the improved method, indicating that the improved streamline curvature method not only improves the prediction accuracy of the centrifugal compressor performance, but also broadens the applicable operating range. The method can provide strong support for the design and optimization process of the centrifugal compressor of the diesel engine, shorten the research and development cycle, and reduce the research and development costs.
2025,47(9): 102-107 收稿日期：2024-7-8
DOI：10.3404/j.issn.1672-7649.2025.09.018
分类号：V231.3
基金项目：国家自然科学基金青年项目（52205271）
作者简介：解放（1994-）男，硕士，工程师，研究方向为机械结构设计
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