Abstract
The stable operation of a high-speed rotating rotor-bearing system is dependent on the internal damping of its materials. In this study, the dynamic behaviours of a rotor-shaft system with internal damping composite materials under the action of a temperature field are analysed. The temperature field will increase the tangential force generated by the internal damping of the composite material. The tangential force will also increase with the rotor speed, which can destabilise the rotor-shaft system. To better understand the dynamic behaviours of the system, we introduced a finite element calculation model of a rotor-shaft system based on a 3D high-order element (Solid186) to study the turbocharger rotor-bearing system in a temperature field. The analysis was done according to the modal damping coefficient, stability limit speed, and unbalance response. The results show that accurate prediction of internal damping energy dissipation in a temperature field is crucial for accurate prediction of rotor dynamic performance. This is an important step to understand dynamic rotor stress and rotor dynamic design.
Highlights
Turbochargers are mechanical devices that can improve fuel efficiency and reduce greenhouse gas emissions. e core component of a turbocharger is a rotor composed mainly of a turbine and a compressor. e turbine is crucial because it can recover energy from the exhaust gas and increase the intake air volume by driving the compressor [1]
We verified the numerical results of the mass flow and the supercharger ratio. e numerical results agreed with the experimental data, and the error control was approximately 7%, as Figure 12 shows
Conclusions is study used the conjugate heat transfer (CHT) numerical simulation method to obtain the temperature of a rotor-shaft system and found that there was a large temperature gradient when the system was in use
Summary
Turbochargers are mechanical devices that can improve fuel efficiency and reduce greenhouse gas emissions. e core component of a turbocharger is a rotor composed mainly of a turbine and a compressor. e turbine is crucial because it can recover energy from the exhaust gas and increase the intake air volume by driving the compressor [1]. E turbine is crucial because it can recover energy from the exhaust gas and increase the intake air volume by driving the compressor [1]. E core component of a turbocharger is a rotor composed mainly of a turbine and a compressor. It is characterized by light weight and high speed. Damping is divided into external damping, such as bearing damping, and internal damping, such as material damping, which in turn is mainly modelled by viscous damping and hysteretic damping [2]. Most single materials, such as metals, have vibration damping characteristics similar to those of hysteretic internal damping but not viscous internal damping [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
