基于热流固耦合的无油螺杆压缩机流场数值模拟方法

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中图分类号：TQ051;TP391.9 文献标志码：A文章编号：1001-5922（2025）07-0133-03

Abstract： When the working speed of the oil-free twin-screw compressr rises，the higher working pressure requires a smallsealing gap in the working chamber.However，toosmall a sealing gap may cause the rotor to get stuck due to thermaldeformation and cause the operation failureof the whole machine.Therefore，the design of the sealing clearanceof the working chamberis atechnical difculty inthe designof this type of screw compresor.Inorder to solve this problem，athree-dimensional couplingsimulation model between the internalflow fieldandthesoliddeformationof the rotor was establishedthrough the weak coupling analysis method，based onthe hexahedral meshing technology and the conjugate heat transfer method.

Key words：oil-free screw compressor;conjugate heat transfer;thermal fluid structure coupling

在无油螺杆压缩机设计前期，由于无油螺杆没有喷液冷却措施，所以在工作状态下转子腔内温度分布极不均匀；其热变形程度又往往和设计固有间隙在一个数量级，若在压缩机设计时，忽略转子热变形和工作腔内流场间的相互影响，会大大降低设计结果的可靠性。（剩余4226字）