本文论述导致柴油机涡轮增压器导风轮叶片断裂的激振源问题,叙述了试验方法和结果。试验发现,在进气道出口截面,存在着周向总压畸变。它是引起叶片共振并导致其断裂的激振源。文中提出二次流流动模型来解释畸变形成的原因。作者试验了多种改善流场畸变的进气道方案,其中包括采用涡流发生器来消除畸变,并根据试验提出了能使畸变幅度减少原始值的13.2%的进气道方案。 This paper discusses the excitation source that leads to the breakage of the guide vane of a diesel turbocharger, and describes the test methods and results. The test found that at the inlet cross-section, there is a total circumferential pressure distortion. It is the excitation source that causes the blade to resonate and cause it to break. In this paper, a secondary flow model is proposed to explain the reason of distortion. The authors tested a number of inlet solutions to improve flow field distortion. These included the use of a vortex generator to eliminate distortion and based on experiments a 13.2% inlet approach was proposed that reduced the distortion by as much as its original value.